diff --git a/.gitmodules b/.gitmodules
index 008bc5fae809b9327614df4a432c2d3d894f2c61..c37d0abdf0bdf70f9b97f16bf7ae6010d16c6eb5 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -14,3 +14,6 @@
 [submodule "third_party/boringssl"]
 	path = third_party/boringssl
 	url = https://boringssl.googlesource.com/boringssl
+[submodule "third_party/nanopb"]
+	path = third_party/nanopb
+	url = https://github.com/nanopb/nanopb.git
diff --git a/BUILD b/BUILD
index cbaad9bff278d05534f29ee3db9f0516eb97c997..91559ff98e15f4ea3c5919f0cc1d78e8aa0e5e8b 100644
--- a/BUILD
+++ b/BUILD
@@ -154,20 +154,6 @@ cc_library(
 cc_library(
   name = "grpc",
   srcs = [
-    "src/core/security/auth_filters.h",
-    "src/core/security/base64.h",
-    "src/core/security/credentials.h",
-    "src/core/security/handshake.h",
-    "src/core/security/json_token.h",
-    "src/core/security/jwt_verifier.h",
-    "src/core/security/secure_endpoint.h",
-    "src/core/security/security_connector.h",
-    "src/core/security/security_context.h",
-    "src/core/tsi/fake_transport_security.h",
-    "src/core/tsi/ssl_transport_security.h",
-    "src/core/tsi/ssl_types.h",
-    "src/core/tsi/transport_security.h",
-    "src/core/tsi/transport_security_interface.h",
     "src/core/census/grpc_filter.h",
     "src/core/channel/channel_args.h",
     "src/core/channel/channel_stack.h",
@@ -182,6 +168,7 @@ cc_library(
     "src/core/client_config/client_config.h",
     "src/core/client_config/connector.h",
     "src/core/client_config/initial_connect_string.h",
+    "src/core/client_config/lb_policies/load_balancer_api.h",
     "src/core/client_config/lb_policies/pick_first.h",
     "src/core/client_config/lb_policies/round_robin.h",
     "src/core/client_config/lb_policy.h",
@@ -242,6 +229,7 @@ cc_library(
     "src/core/json/json_common.h",
     "src/core/json/json_reader.h",
     "src/core/json/json_writer.h",
+    "src/core/proto/grpc/lb/v0/load_balancer.pb.h",
     "src/core/statistics/census_interface.h",
     "src/core/statistics/census_rpc_stats.h",
     "src/core/surface/api_trace.h",
@@ -281,30 +269,27 @@ cc_library(
     "src/core/transport/static_metadata.h",
     "src/core/transport/transport.h",
     "src/core/transport/transport_impl.h",
+    "src/core/security/auth_filters.h",
+    "src/core/security/base64.h",
+    "src/core/security/credentials.h",
+    "src/core/security/handshake.h",
+    "src/core/security/json_token.h",
+    "src/core/security/jwt_verifier.h",
+    "src/core/security/secure_endpoint.h",
+    "src/core/security/security_connector.h",
+    "src/core/security/security_context.h",
+    "src/core/tsi/fake_transport_security.h",
+    "src/core/tsi/ssl_transport_security.h",
+    "src/core/tsi/ssl_types.h",
+    "src/core/tsi/transport_security.h",
+    "src/core/tsi/transport_security_interface.h",
     "src/core/census/aggregation.h",
-    "src/core/census/log.h",
+    "src/core/census/mlog.h",
     "src/core/census/rpc_metric_id.h",
-    "src/core/httpcli/httpcli_security_connector.c",
-    "src/core/security/base64.c",
-    "src/core/security/client_auth_filter.c",
-    "src/core/security/credentials.c",
-    "src/core/security/credentials_metadata.c",
-    "src/core/security/credentials_posix.c",
-    "src/core/security/credentials_win32.c",
-    "src/core/security/google_default_credentials.c",
-    "src/core/security/handshake.c",
-    "src/core/security/json_token.c",
-    "src/core/security/jwt_verifier.c",
-    "src/core/security/secure_endpoint.c",
-    "src/core/security/security_connector.c",
-    "src/core/security/security_context.c",
-    "src/core/security/server_auth_filter.c",
-    "src/core/security/server_secure_chttp2.c",
-    "src/core/surface/init_secure.c",
-    "src/core/surface/secure_channel_create.c",
-    "src/core/tsi/fake_transport_security.c",
-    "src/core/tsi/ssl_transport_security.c",
-    "src/core/tsi/transport_security.c",
+    "third_party/nanopb/pb.h",
+    "third_party/nanopb/pb_common.h",
+    "third_party/nanopb/pb_decode.h",
+    "third_party/nanopb/pb_encode.h",
     "src/core/census/grpc_context.c",
     "src/core/census/grpc_filter.c",
     "src/core/channel/channel_args.c",
@@ -320,6 +305,7 @@ cc_library(
     "src/core/client_config/connector.c",
     "src/core/client_config/default_initial_connect_string.c",
     "src/core/client_config/initial_connect_string.c",
+    "src/core/client_config/lb_policies/load_balancer_api.c",
     "src/core/client_config/lb_policies/pick_first.c",
     "src/core/client_config/lb_policies/round_robin.c",
     "src/core/client_config/lb_policy.c",
@@ -384,6 +370,7 @@ cc_library(
     "src/core/json/json_reader.c",
     "src/core/json/json_string.c",
     "src/core/json/json_writer.c",
+    "src/core/proto/grpc/lb/v0/load_balancer.pb.c",
     "src/core/surface/alarm.c",
     "src/core/surface/api_trace.c",
     "src/core/surface/byte_buffer.c",
@@ -433,12 +420,36 @@ cc_library(
     "src/core/transport/static_metadata.c",
     "src/core/transport/transport.c",
     "src/core/transport/transport_op_string.c",
+    "src/core/httpcli/httpcli_security_connector.c",
+    "src/core/security/base64.c",
+    "src/core/security/client_auth_filter.c",
+    "src/core/security/credentials.c",
+    "src/core/security/credentials_metadata.c",
+    "src/core/security/credentials_posix.c",
+    "src/core/security/credentials_win32.c",
+    "src/core/security/google_default_credentials.c",
+    "src/core/security/handshake.c",
+    "src/core/security/json_token.c",
+    "src/core/security/jwt_verifier.c",
+    "src/core/security/secure_endpoint.c",
+    "src/core/security/security_connector.c",
+    "src/core/security/security_context.c",
+    "src/core/security/server_auth_filter.c",
+    "src/core/security/server_secure_chttp2.c",
+    "src/core/surface/init_secure.c",
+    "src/core/surface/secure_channel_create.c",
+    "src/core/tsi/fake_transport_security.c",
+    "src/core/tsi/ssl_transport_security.c",
+    "src/core/tsi/transport_security.c",
     "src/core/census/context.c",
     "src/core/census/initialize.c",
-    "src/core/census/log.c",
+    "src/core/census/mlog.c",
     "src/core/census/operation.c",
     "src/core/census/placeholders.c",
     "src/core/census/tracing.c",
+    "third_party/nanopb/pb_common.c",
+    "third_party/nanopb/pb_decode.c",
+    "third_party/nanopb/pb_encode.c",
   ],
   hdrs = [
     "include/grpc/grpc_security.h",
@@ -487,6 +498,7 @@ cc_library(
     "src/core/client_config/client_config.h",
     "src/core/client_config/connector.h",
     "src/core/client_config/initial_connect_string.h",
+    "src/core/client_config/lb_policies/load_balancer_api.h",
     "src/core/client_config/lb_policies/pick_first.h",
     "src/core/client_config/lb_policies/round_robin.h",
     "src/core/client_config/lb_policy.h",
@@ -547,6 +559,7 @@ cc_library(
     "src/core/json/json_common.h",
     "src/core/json/json_reader.h",
     "src/core/json/json_writer.h",
+    "src/core/proto/grpc/lb/v0/load_balancer.pb.h",
     "src/core/statistics/census_interface.h",
     "src/core/statistics/census_rpc_stats.h",
     "src/core/surface/api_trace.h",
@@ -587,8 +600,12 @@ cc_library(
     "src/core/transport/transport.h",
     "src/core/transport/transport_impl.h",
     "src/core/census/aggregation.h",
-    "src/core/census/log.h",
+    "src/core/census/mlog.h",
     "src/core/census/rpc_metric_id.h",
+    "third_party/nanopb/pb.h",
+    "third_party/nanopb/pb_common.h",
+    "third_party/nanopb/pb_decode.h",
+    "third_party/nanopb/pb_encode.h",
     "src/core/surface/init_unsecure.c",
     "src/core/census/grpc_context.c",
     "src/core/census/grpc_filter.c",
@@ -605,6 +622,7 @@ cc_library(
     "src/core/client_config/connector.c",
     "src/core/client_config/default_initial_connect_string.c",
     "src/core/client_config/initial_connect_string.c",
+    "src/core/client_config/lb_policies/load_balancer_api.c",
     "src/core/client_config/lb_policies/pick_first.c",
     "src/core/client_config/lb_policies/round_robin.c",
     "src/core/client_config/lb_policy.c",
@@ -669,6 +687,7 @@ cc_library(
     "src/core/json/json_reader.c",
     "src/core/json/json_string.c",
     "src/core/json/json_writer.c",
+    "src/core/proto/grpc/lb/v0/load_balancer.pb.c",
     "src/core/surface/alarm.c",
     "src/core/surface/api_trace.c",
     "src/core/surface/byte_buffer.c",
@@ -720,10 +739,13 @@ cc_library(
     "src/core/transport/transport_op_string.c",
     "src/core/census/context.c",
     "src/core/census/initialize.c",
-    "src/core/census/log.c",
+    "src/core/census/mlog.c",
     "src/core/census/operation.c",
     "src/core/census/placeholders.c",
     "src/core/census/tracing.c",
+    "third_party/nanopb/pb_common.c",
+    "third_party/nanopb/pb_decode.c",
+    "third_party/nanopb/pb_encode.c",
   ],
   hdrs = [
     "include/grpc/byte_buffer.h",
@@ -1247,27 +1269,6 @@ objc_library(
 objc_library(
   name = "grpc_objc",
   srcs = [
-    "src/core/httpcli/httpcli_security_connector.c",
-    "src/core/security/base64.c",
-    "src/core/security/client_auth_filter.c",
-    "src/core/security/credentials.c",
-    "src/core/security/credentials_metadata.c",
-    "src/core/security/credentials_posix.c",
-    "src/core/security/credentials_win32.c",
-    "src/core/security/google_default_credentials.c",
-    "src/core/security/handshake.c",
-    "src/core/security/json_token.c",
-    "src/core/security/jwt_verifier.c",
-    "src/core/security/secure_endpoint.c",
-    "src/core/security/security_connector.c",
-    "src/core/security/security_context.c",
-    "src/core/security/server_auth_filter.c",
-    "src/core/security/server_secure_chttp2.c",
-    "src/core/surface/init_secure.c",
-    "src/core/surface/secure_channel_create.c",
-    "src/core/tsi/fake_transport_security.c",
-    "src/core/tsi/ssl_transport_security.c",
-    "src/core/tsi/transport_security.c",
     "src/core/census/grpc_context.c",
     "src/core/census/grpc_filter.c",
     "src/core/channel/channel_args.c",
@@ -1283,6 +1284,7 @@ objc_library(
     "src/core/client_config/connector.c",
     "src/core/client_config/default_initial_connect_string.c",
     "src/core/client_config/initial_connect_string.c",
+    "src/core/client_config/lb_policies/load_balancer_api.c",
     "src/core/client_config/lb_policies/pick_first.c",
     "src/core/client_config/lb_policies/round_robin.c",
     "src/core/client_config/lb_policy.c",
@@ -1347,6 +1349,7 @@ objc_library(
     "src/core/json/json_reader.c",
     "src/core/json/json_string.c",
     "src/core/json/json_writer.c",
+    "src/core/proto/grpc/lb/v0/load_balancer.pb.c",
     "src/core/surface/alarm.c",
     "src/core/surface/api_trace.c",
     "src/core/surface/byte_buffer.c",
@@ -1396,12 +1399,36 @@ objc_library(
     "src/core/transport/static_metadata.c",
     "src/core/transport/transport.c",
     "src/core/transport/transport_op_string.c",
+    "src/core/httpcli/httpcli_security_connector.c",
+    "src/core/security/base64.c",
+    "src/core/security/client_auth_filter.c",
+    "src/core/security/credentials.c",
+    "src/core/security/credentials_metadata.c",
+    "src/core/security/credentials_posix.c",
+    "src/core/security/credentials_win32.c",
+    "src/core/security/google_default_credentials.c",
+    "src/core/security/handshake.c",
+    "src/core/security/json_token.c",
+    "src/core/security/jwt_verifier.c",
+    "src/core/security/secure_endpoint.c",
+    "src/core/security/security_connector.c",
+    "src/core/security/security_context.c",
+    "src/core/security/server_auth_filter.c",
+    "src/core/security/server_secure_chttp2.c",
+    "src/core/surface/init_secure.c",
+    "src/core/surface/secure_channel_create.c",
+    "src/core/tsi/fake_transport_security.c",
+    "src/core/tsi/ssl_transport_security.c",
+    "src/core/tsi/transport_security.c",
     "src/core/census/context.c",
     "src/core/census/initialize.c",
-    "src/core/census/log.c",
+    "src/core/census/mlog.c",
     "src/core/census/operation.c",
     "src/core/census/placeholders.c",
     "src/core/census/tracing.c",
+    "third_party/nanopb/pb_common.c",
+    "third_party/nanopb/pb_decode.c",
+    "third_party/nanopb/pb_encode.c",
   ],
   hdrs = [
     "include/grpc/grpc_security.h",
@@ -1417,20 +1444,6 @@ objc_library(
     "include/grpc/grpc.h",
     "include/grpc/status.h",
     "include/grpc/census.h",
-    "src/core/security/auth_filters.h",
-    "src/core/security/base64.h",
-    "src/core/security/credentials.h",
-    "src/core/security/handshake.h",
-    "src/core/security/json_token.h",
-    "src/core/security/jwt_verifier.h",
-    "src/core/security/secure_endpoint.h",
-    "src/core/security/security_connector.h",
-    "src/core/security/security_context.h",
-    "src/core/tsi/fake_transport_security.h",
-    "src/core/tsi/ssl_transport_security.h",
-    "src/core/tsi/ssl_types.h",
-    "src/core/tsi/transport_security.h",
-    "src/core/tsi/transport_security_interface.h",
     "src/core/census/grpc_filter.h",
     "src/core/channel/channel_args.h",
     "src/core/channel/channel_stack.h",
@@ -1445,6 +1458,7 @@ objc_library(
     "src/core/client_config/client_config.h",
     "src/core/client_config/connector.h",
     "src/core/client_config/initial_connect_string.h",
+    "src/core/client_config/lb_policies/load_balancer_api.h",
     "src/core/client_config/lb_policies/pick_first.h",
     "src/core/client_config/lb_policies/round_robin.h",
     "src/core/client_config/lb_policy.h",
@@ -1505,6 +1519,7 @@ objc_library(
     "src/core/json/json_common.h",
     "src/core/json/json_reader.h",
     "src/core/json/json_writer.h",
+    "src/core/proto/grpc/lb/v0/load_balancer.pb.h",
     "src/core/statistics/census_interface.h",
     "src/core/statistics/census_rpc_stats.h",
     "src/core/surface/api_trace.h",
@@ -1544,9 +1559,27 @@ objc_library(
     "src/core/transport/static_metadata.h",
     "src/core/transport/transport.h",
     "src/core/transport/transport_impl.h",
+    "src/core/security/auth_filters.h",
+    "src/core/security/base64.h",
+    "src/core/security/credentials.h",
+    "src/core/security/handshake.h",
+    "src/core/security/json_token.h",
+    "src/core/security/jwt_verifier.h",
+    "src/core/security/secure_endpoint.h",
+    "src/core/security/security_connector.h",
+    "src/core/security/security_context.h",
+    "src/core/tsi/fake_transport_security.h",
+    "src/core/tsi/ssl_transport_security.h",
+    "src/core/tsi/ssl_types.h",
+    "src/core/tsi/transport_security.h",
+    "src/core/tsi/transport_security_interface.h",
     "src/core/census/aggregation.h",
-    "src/core/census/log.h",
+    "src/core/census/mlog.h",
     "src/core/census/rpc_metric_id.h",
+    "third_party/nanopb/pb.h",
+    "third_party/nanopb/pb_common.h",
+    "third_party/nanopb/pb_decode.h",
+    "third_party/nanopb/pb_encode.h",
   ],
   includes = [
     "include",
diff --git a/Makefile b/Makefile
index 6c7febdabc32763474cb93d6e4a152ee950b49de..6ba96815e76b4bae0c4522dc6205e4ebec724f90 100644
--- a/Makefile
+++ b/Makefile
@@ -121,7 +121,7 @@ LD_asan-noleaks = clang
 LDXX_asan-noleaks = clang++
 CPPFLAGS_asan-noleaks = -O0 -fsanitize=address -fno-omit-frame-pointer -Wno-unused-command-line-argument -DGPR_NO_DIRECT_SYSCALLS
 LDFLAGS_asan-noleaks = -fsanitize=address
-DEFINES_asan-noleaks += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=1.5
+DEFINES_asan-noleaks += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=3
 
 VALID_CONFIG_ubsan = 1
 REQUIRE_CUSTOM_LIBRARIES_ubsan = 1
@@ -177,7 +177,7 @@ LD_asan = clang
 LDXX_asan = clang++
 CPPFLAGS_asan = -O0 -fsanitize=address -fno-omit-frame-pointer -Wno-unused-command-line-argument -DGPR_NO_DIRECT_SYSCALLS
 LDFLAGS_asan = -fsanitize=address
-DEFINES_asan += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=1.5
+DEFINES_asan += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=3
 
 VALID_CONFIG_tsan = 1
 REQUIRE_CUSTOM_LIBRARIES_tsan = 1
@@ -187,7 +187,7 @@ LD_tsan = clang
 LDXX_tsan = clang++
 CPPFLAGS_tsan = -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument -fPIE -pie -DGPR_NO_DIRECT_SYSCALLS
 LDFLAGS_tsan = -fsanitize=thread -fPIE -pie $(if $(JENKINS_BUILD),-Wl$(comma)-Ttext-segment=0x7e0000000000,)
-DEFINES_tsan += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=2
+DEFINES_tsan += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=5
 
 VALID_CONFIG_msan = 1
 REQUIRE_CUSTOM_LIBRARIES_msan = 1
@@ -198,7 +198,7 @@ LDXX_msan = clang++
 CPPFLAGS_msan = -O0 -fsanitize=memory -fsanitize-memory-track-origins -fno-omit-frame-pointer -DGTEST_HAS_TR1_TUPLE=0 -DGTEST_USE_OWN_TR1_TUPLE=1 -Wno-unused-command-line-argument -fPIE -pie -DGPR_NO_DIRECT_SYSCALLS
 LDFLAGS_msan = -fsanitize=memory -DGTEST_HAS_TR1_TUPLE=0 -DGTEST_USE_OWN_TR1_TUPLE=1 -fPIE -pie $(if $(JENKINS_BUILD),-Wl$(comma)-Ttext-segment=0x7e0000000000,)
 DEFINES_msan = NDEBUG
-DEFINES_msan += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=2
+DEFINES_msan += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=4
 
 VALID_CONFIG_mutrace = 1
 CC_mutrace = $(DEFAULT_CC)
@@ -247,7 +247,7 @@ STRIP ?= strip --strip-unneeded
 else
 ifeq ($(SYSTEM),Darwin)
 ifeq ($(origin AR), default)
-AR = libtool -o
+AR = libtool -no_warning_for_no_symbols -o
 endif
 STRIP ?= strip -x
 else
@@ -941,6 +941,7 @@ grpc_csharp_plugin: $(BINDIR)/$(CONFIG)/grpc_csharp_plugin
 grpc_objective_c_plugin: $(BINDIR)/$(CONFIG)/grpc_objective_c_plugin
 grpc_python_plugin: $(BINDIR)/$(CONFIG)/grpc_python_plugin
 grpc_ruby_plugin: $(BINDIR)/$(CONFIG)/grpc_ruby_plugin
+grpclb_api_test: $(BINDIR)/$(CONFIG)/grpclb_api_test
 hybrid_end2end_test: $(BINDIR)/$(CONFIG)/hybrid_end2end_test
 interop_client: $(BINDIR)/$(CONFIG)/interop_client
 interop_server: $(BINDIR)/$(CONFIG)/interop_server
@@ -1285,6 +1286,7 @@ buildtests_cxx: buildtests_zookeeper privatelibs_cxx \
   $(BINDIR)/$(CONFIG)/generic_async_streaming_ping_pong_test \
   $(BINDIR)/$(CONFIG)/generic_end2end_test \
   $(BINDIR)/$(CONFIG)/grpc_cli \
+  $(BINDIR)/$(CONFIG)/grpclb_api_test \
   $(BINDIR)/$(CONFIG)/hybrid_end2end_test \
   $(BINDIR)/$(CONFIG)/interop_client \
   $(BINDIR)/$(CONFIG)/interop_server \
@@ -1595,6 +1597,8 @@ test_cxx: test_zookeeper buildtests_cxx
 	$(Q) $(BINDIR)/$(CONFIG)/generic_async_streaming_ping_pong_test || ( echo test generic_async_streaming_ping_pong_test failed ; exit 1 )
 	$(E) "[RUN]     Testing generic_end2end_test"
 	$(Q) $(BINDIR)/$(CONFIG)/generic_end2end_test || ( echo test generic_end2end_test failed ; exit 1 )
+	$(E) "[RUN]     Testing grpclb_api_test"
+	$(Q) $(BINDIR)/$(CONFIG)/grpclb_api_test || ( echo test grpclb_api_test failed ; exit 1 )
 	$(E) "[RUN]     Testing hybrid_end2end_test"
 	$(Q) $(BINDIR)/$(CONFIG)/hybrid_end2end_test || ( echo test hybrid_end2end_test failed ; exit 1 )
 	$(E) "[RUN]     Testing interop_test"
@@ -1746,6 +1750,21 @@ $(LIBDIR)/$(CONFIG)/pkgconfig/grpc++_unsecure.pc:
 	$(Q) mkdir -p $(@D)
 	$(Q) echo "$(GRPCXX_UNSECURE_PC_FILE)" | tr , '\n' >$@
 
+ifeq ($(NO_PROTOC),true)
+$(GENDIR)/src/proto/grpc/lb/v0/load_balancer.pb.cc: protoc_dep_error
+$(GENDIR)/src/proto/grpc/lb/v0/load_balancer.grpc.pb.cc: protoc_dep_error
+else
+$(GENDIR)/src/proto/grpc/lb/v0/load_balancer.pb.cc: src/proto/grpc/lb/v0/load_balancer.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
+	$(E) "[PROTOC]  Generating protobuf CC file from $<"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+
+$(GENDIR)/src/proto/grpc/lb/v0/load_balancer.grpc.pb.cc: src/proto/grpc/lb/v0/load_balancer.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
+	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+endif
+
 ifeq ($(NO_PROTOC),true)
 $(GENDIR)/src/proto/grpc/testing/control.pb.cc: protoc_dep_error
 $(GENDIR)/src/proto/grpc/testing/control.grpc.pb.cc: protoc_dep_error
@@ -2265,7 +2284,7 @@ $(LIBDIR)/$(CONFIG)/libgpr.a: $(ZLIB_DEP)  $(LIBGPR_OBJS)
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBGPR_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgpr.a
 endif
 
 
@@ -2306,7 +2325,7 @@ $(LIBDIR)/$(CONFIG)/libgpr_test_util.a: $(ZLIB_DEP)  $(LIBGPR_TEST_UTIL_OBJS)
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgpr_test_util.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBGPR_TEST_UTIL_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libgpr_test_util.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgpr_test_util.a
 endif
 
 
@@ -2318,27 +2337,6 @@ endif
 
 
 LIBGRPC_SRC = \
-    src/core/httpcli/httpcli_security_connector.c \
-    src/core/security/base64.c \
-    src/core/security/client_auth_filter.c \
-    src/core/security/credentials.c \
-    src/core/security/credentials_metadata.c \
-    src/core/security/credentials_posix.c \
-    src/core/security/credentials_win32.c \
-    src/core/security/google_default_credentials.c \
-    src/core/security/handshake.c \
-    src/core/security/json_token.c \
-    src/core/security/jwt_verifier.c \
-    src/core/security/secure_endpoint.c \
-    src/core/security/security_connector.c \
-    src/core/security/security_context.c \
-    src/core/security/server_auth_filter.c \
-    src/core/security/server_secure_chttp2.c \
-    src/core/surface/init_secure.c \
-    src/core/surface/secure_channel_create.c \
-    src/core/tsi/fake_transport_security.c \
-    src/core/tsi/ssl_transport_security.c \
-    src/core/tsi/transport_security.c \
     src/core/census/grpc_context.c \
     src/core/census/grpc_filter.c \
     src/core/channel/channel_args.c \
@@ -2354,6 +2352,7 @@ LIBGRPC_SRC = \
     src/core/client_config/connector.c \
     src/core/client_config/default_initial_connect_string.c \
     src/core/client_config/initial_connect_string.c \
+    src/core/client_config/lb_policies/load_balancer_api.c \
     src/core/client_config/lb_policies/pick_first.c \
     src/core/client_config/lb_policies/round_robin.c \
     src/core/client_config/lb_policy.c \
@@ -2418,6 +2417,7 @@ LIBGRPC_SRC = \
     src/core/json/json_reader.c \
     src/core/json/json_string.c \
     src/core/json/json_writer.c \
+    src/core/proto/grpc/lb/v0/load_balancer.pb.c \
     src/core/surface/alarm.c \
     src/core/surface/api_trace.c \
     src/core/surface/byte_buffer.c \
@@ -2467,12 +2467,36 @@ LIBGRPC_SRC = \
     src/core/transport/static_metadata.c \
     src/core/transport/transport.c \
     src/core/transport/transport_op_string.c \
+    src/core/httpcli/httpcli_security_connector.c \
+    src/core/security/base64.c \
+    src/core/security/client_auth_filter.c \
+    src/core/security/credentials.c \
+    src/core/security/credentials_metadata.c \
+    src/core/security/credentials_posix.c \
+    src/core/security/credentials_win32.c \
+    src/core/security/google_default_credentials.c \
+    src/core/security/handshake.c \
+    src/core/security/json_token.c \
+    src/core/security/jwt_verifier.c \
+    src/core/security/secure_endpoint.c \
+    src/core/security/security_connector.c \
+    src/core/security/security_context.c \
+    src/core/security/server_auth_filter.c \
+    src/core/security/server_secure_chttp2.c \
+    src/core/surface/init_secure.c \
+    src/core/surface/secure_channel_create.c \
+    src/core/tsi/fake_transport_security.c \
+    src/core/tsi/ssl_transport_security.c \
+    src/core/tsi/transport_security.c \
     src/core/census/context.c \
     src/core/census/initialize.c \
-    src/core/census/log.c \
+    src/core/census/mlog.c \
     src/core/census/operation.c \
     src/core/census/placeholders.c \
     src/core/census/tracing.c \
+    third_party/nanopb/pb_common.c \
+    third_party/nanopb/pb_decode.c \
+    third_party/nanopb/pb_encode.c \
 
 PUBLIC_HEADERS_C += \
     include/grpc/grpc_security.h \
@@ -2509,7 +2533,7 @@ $(LIBDIR)/$(CONFIG)/libgrpc.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(LIBGRPC_OBJS)  $(LIB
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBGRPC_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(OPENSSL_MERGE_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libgrpc.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc.a
 endif
 
 
@@ -2576,7 +2600,7 @@ $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(LIBGRPC_TE
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBGRPC_TEST_UTIL_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a
 endif
 
 
@@ -2612,7 +2636,7 @@ $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a: $(ZLIB_DEP)  $(LIBGRPC_TEST_UT
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBGRPC_TEST_UTIL_UNSECURE_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a
 endif
 
 
@@ -2640,6 +2664,7 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/client_config/connector.c \
     src/core/client_config/default_initial_connect_string.c \
     src/core/client_config/initial_connect_string.c \
+    src/core/client_config/lb_policies/load_balancer_api.c \
     src/core/client_config/lb_policies/pick_first.c \
     src/core/client_config/lb_policies/round_robin.c \
     src/core/client_config/lb_policy.c \
@@ -2704,6 +2729,7 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/json/json_reader.c \
     src/core/json/json_string.c \
     src/core/json/json_writer.c \
+    src/core/proto/grpc/lb/v0/load_balancer.pb.c \
     src/core/surface/alarm.c \
     src/core/surface/api_trace.c \
     src/core/surface/byte_buffer.c \
@@ -2755,10 +2781,13 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/transport/transport_op_string.c \
     src/core/census/context.c \
     src/core/census/initialize.c \
-    src/core/census/log.c \
+    src/core/census/mlog.c \
     src/core/census/operation.c \
     src/core/census/placeholders.c \
     src/core/census/tracing.c \
+    third_party/nanopb/pb_common.c \
+    third_party/nanopb/pb_decode.c \
+    third_party/nanopb/pb_encode.c \
 
 PUBLIC_HEADERS_C += \
     include/grpc/byte_buffer.h \
@@ -2783,7 +2812,7 @@ $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a: $(ZLIB_DEP)  $(LIBGRPC_UNSECURE_OBJS)  $
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBGRPC_UNSECURE_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a
 endif
 
 
@@ -2826,7 +2855,7 @@ $(LIBDIR)/$(CONFIG)/libgrpc_zookeeper.a: $(ZLIB_DEP)  $(LIBGRPC_ZOOKEEPER_OBJS)
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc_zookeeper.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libgrpc_zookeeper.a $(LIBGRPC_ZOOKEEPER_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libgrpc_zookeeper.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc_zookeeper.a
 endif
 
 
@@ -2877,7 +2906,7 @@ $(LIBDIR)/$(CONFIG)/libreconnect_server.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(LIBRECON
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libreconnect_server.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libreconnect_server.a $(LIBRECONNECT_SERVER_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libreconnect_server.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libreconnect_server.a
 endif
 
 
@@ -2915,7 +2944,7 @@ $(LIBDIR)/$(CONFIG)/libtest_tcp_server.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(LIBTEST_T
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libtest_tcp_server.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libtest_tcp_server.a $(LIBTEST_TCP_SERVER_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libtest_tcp_server.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libtest_tcp_server.a
 endif
 
 
@@ -3070,7 +3099,7 @@ $(LIBDIR)/$(CONFIG)/libgrpc++.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(PROTOBUF_DEP) $(LI
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc++.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBGRPC++_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libgrpc++.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc++.a
 endif
 
 
@@ -3135,7 +3164,7 @@ $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(PROTOB
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a $(LIBGRPC++_TEST_CONFIG_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a
 endif
 
 
@@ -3162,6 +3191,7 @@ LIBGRPC++_TEST_UTIL_SRC = \
     test/cpp/util/create_test_channel.cc \
     test/cpp/util/string_ref_helper.cc \
     test/cpp/util/subprocess.cc \
+    test/cpp/util/test_credentials_provider.cc \
 
 
 LIBGRPC++_TEST_UTIL_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC++_TEST_UTIL_SRC))))
@@ -3191,7 +3221,7 @@ $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(PROTOBUF
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBGRPC++_TEST_UTIL_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a
 endif
 
 
@@ -3212,6 +3242,7 @@ $(OBJDIR)/$(CONFIG)/test/cpp/util/cli_call.o: $(GENDIR)/src/proto/grpc/testing/e
 $(OBJDIR)/$(CONFIG)/test/cpp/util/create_test_channel.o: $(GENDIR)/src/proto/grpc/testing/echo_messages.pb.cc $(GENDIR)/src/proto/grpc/testing/echo_messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.cc
 $(OBJDIR)/$(CONFIG)/test/cpp/util/string_ref_helper.o: $(GENDIR)/src/proto/grpc/testing/echo_messages.pb.cc $(GENDIR)/src/proto/grpc/testing/echo_messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.cc
 $(OBJDIR)/$(CONFIG)/test/cpp/util/subprocess.o: $(GENDIR)/src/proto/grpc/testing/echo_messages.pb.cc $(GENDIR)/src/proto/grpc/testing/echo_messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.cc
+$(OBJDIR)/$(CONFIG)/test/cpp/util/test_credentials_provider.o: $(GENDIR)/src/proto/grpc/testing/echo_messages.pb.cc $(GENDIR)/src/proto/grpc/testing/echo_messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.pb.cc $(GENDIR)/src/proto/grpc/testing/echo.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.pb.cc $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.cc
 
 
 LIBGRPC++_UNSECURE_SRC = \
@@ -3339,7 +3370,7 @@ $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBGRPC
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a $(LIBGRPC++_UNSECURE_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a
 endif
 
 
@@ -3447,7 +3478,7 @@ $(LIBDIR)/$(CONFIG)/libgrpc_plugin_support.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIB
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc_plugin_support.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libgrpc_plugin_support.a $(LIBGRPC_PLUGIN_SUPPORT_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libgrpc_plugin_support.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc_plugin_support.a
 endif
 
 
@@ -3492,7 +3523,7 @@ $(LIBDIR)/$(CONFIG)/libinterop_client_helper.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(PRO
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libinterop_client_helper.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libinterop_client_helper.a $(LIBINTEROP_CLIENT_HELPER_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libinterop_client_helper.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libinterop_client_helper.a
 endif
 
 
@@ -3545,7 +3576,7 @@ $(LIBDIR)/$(CONFIG)/libinterop_client_main.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(PROTO
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libinterop_client_main.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libinterop_client_main.a $(LIBINTEROP_CLIENT_MAIN_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libinterop_client_main.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libinterop_client_main.a
 endif
 
 
@@ -3595,7 +3626,7 @@ $(LIBDIR)/$(CONFIG)/libinterop_server_helper.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(PRO
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libinterop_server_helper.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libinterop_server_helper.a $(LIBINTEROP_SERVER_HELPER_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libinterop_server_helper.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libinterop_server_helper.a
 endif
 
 
@@ -3646,7 +3677,7 @@ $(LIBDIR)/$(CONFIG)/libinterop_server_main.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(PROTO
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libinterop_server_main.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libinterop_server_main.a $(LIBINTEROP_SERVER_MAIN_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libinterop_server_main.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libinterop_server_main.a
 endif
 
 
@@ -3711,7 +3742,7 @@ $(LIBDIR)/$(CONFIG)/libqps.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(PROTOBUF_DEP) $(LIBQP
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libqps.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libqps.a $(LIBQPS_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libqps.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libqps.a
 endif
 
 
@@ -3763,7 +3794,7 @@ $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(LIBGRPC_C
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext.a $(LIBGRPC_CSHARP_EXT_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc_csharp_ext.a
 endif
 
 
@@ -4103,7 +4134,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl.a: $(ZLIB_DEP)  $(LIBBORINGSSL_OBJS)
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl.a $(LIBBORINGSSL_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl.a
 endif
 
 
@@ -4140,7 +4171,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_test_util.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIB
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_test_util.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_test_util.a $(LIBBORINGSSL_TEST_UTIL_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_test_util.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_test_util.a
 endif
 
 
@@ -4177,7 +4208,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_aes_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_aes_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_aes_test_lib.a $(LIBBORINGSSL_AES_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_aes_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_aes_test_lib.a
 endif
 
 
@@ -4214,7 +4245,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_base64_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP)
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_base64_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_base64_test_lib.a $(LIBBORINGSSL_BASE64_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_base64_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_base64_test_lib.a
 endif
 
 
@@ -4251,7 +4282,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_bio_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_bio_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_bio_test_lib.a $(LIBBORINGSSL_BIO_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_bio_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_bio_test_lib.a
 endif
 
 
@@ -4288,7 +4319,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_bn_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(L
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_bn_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_bn_test_lib.a $(LIBBORINGSSL_BN_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_bn_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_bn_test_lib.a
 endif
 
 
@@ -4325,7 +4356,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_bytestring_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_bytestring_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_bytestring_test_lib.a $(LIBBORINGSSL_BYTESTRING_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_bytestring_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_bytestring_test_lib.a
 endif
 
 
@@ -4362,7 +4393,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_aead_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_aead_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_aead_test_lib.a $(LIBBORINGSSL_AEAD_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_aead_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_aead_test_lib.a
 endif
 
 
@@ -4399,7 +4430,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_cipher_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP)
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_cipher_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_cipher_test_lib.a $(LIBBORINGSSL_CIPHER_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_cipher_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_cipher_test_lib.a
 endif
 
 
@@ -4436,7 +4467,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_cmac_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_cmac_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_cmac_test_lib.a $(LIBBORINGSSL_CMAC_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_cmac_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_cmac_test_lib.a
 endif
 
 
@@ -4464,7 +4495,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_constant_time_test_lib.a: $(ZLIB_DEP)  $(LIBBOR
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_constant_time_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_constant_time_test_lib.a $(LIBBORINGSSL_CONSTANT_TIME_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_constant_time_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_constant_time_test_lib.a
 endif
 
 
@@ -4499,7 +4530,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_ed25519_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_ed25519_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_ed25519_test_lib.a $(LIBBORINGSSL_ED25519_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_ed25519_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_ed25519_test_lib.a
 endif
 
 
@@ -4536,7 +4567,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_x25519_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP)
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_x25519_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_x25519_test_lib.a $(LIBBORINGSSL_X25519_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_x25519_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_x25519_test_lib.a
 endif
 
 
@@ -4573,7 +4604,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_dh_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(L
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_dh_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_dh_test_lib.a $(LIBBORINGSSL_DH_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_dh_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_dh_test_lib.a
 endif
 
 
@@ -4610,7 +4641,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_digest_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP)
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_digest_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_digest_test_lib.a $(LIBBORINGSSL_DIGEST_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_digest_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_digest_test_lib.a
 endif
 
 
@@ -4638,7 +4669,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_dsa_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_DSA
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_dsa_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_dsa_test_lib.a $(LIBBORINGSSL_DSA_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_dsa_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_dsa_test_lib.a
 endif
 
 
@@ -4673,7 +4704,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_ec_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(L
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_ec_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_ec_test_lib.a $(LIBBORINGSSL_EC_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_ec_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_ec_test_lib.a
 endif
 
 
@@ -4701,7 +4732,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_example_mul_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_example_mul_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_example_mul_lib.a $(LIBBORINGSSL_EXAMPLE_MUL_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_example_mul_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_example_mul_lib.a
 endif
 
 
@@ -4736,7 +4767,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP)
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_test_lib.a $(LIBBORINGSSL_ECDSA_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_test_lib.a
 endif
 
 
@@ -4773,7 +4804,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_err_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_err_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_err_test_lib.a $(LIBBORINGSSL_ERR_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_err_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_err_test_lib.a
 endif
 
 
@@ -4810,7 +4841,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_evp_extra_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_D
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_evp_extra_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_evp_extra_test_lib.a $(LIBBORINGSSL_EVP_EXTRA_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_evp_extra_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_evp_extra_test_lib.a
 endif
 
 
@@ -4847,7 +4878,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_evp_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_evp_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_evp_test_lib.a $(LIBBORINGSSL_EVP_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_evp_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_evp_test_lib.a
 endif
 
 
@@ -4884,7 +4915,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_pbkdf_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP)
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_pbkdf_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_pbkdf_test_lib.a $(LIBBORINGSSL_PBKDF_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_pbkdf_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_pbkdf_test_lib.a
 endif
 
 
@@ -4912,7 +4943,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_hkdf_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_HK
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_hkdf_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_hkdf_test_lib.a $(LIBBORINGSSL_HKDF_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_hkdf_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_hkdf_test_lib.a
 endif
 
 
@@ -4947,7 +4978,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_hmac_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_hmac_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_hmac_test_lib.a $(LIBBORINGSSL_HMAC_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_hmac_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_hmac_test_lib.a
 endif
 
 
@@ -4975,7 +5006,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_lhash_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_L
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_lhash_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_lhash_test_lib.a $(LIBBORINGSSL_LHASH_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_lhash_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_lhash_test_lib.a
 endif
 
 
@@ -5001,7 +5032,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_gcm_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_GCM
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_gcm_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_gcm_test_lib.a $(LIBBORINGSSL_GCM_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_gcm_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_gcm_test_lib.a
 endif
 
 
@@ -5036,7 +5067,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_pkcs12_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP)
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_pkcs12_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_pkcs12_test_lib.a $(LIBBORINGSSL_PKCS12_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_pkcs12_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_pkcs12_test_lib.a
 endif
 
 
@@ -5073,7 +5104,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_pkcs8_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP)
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_pkcs8_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_pkcs8_test_lib.a $(LIBBORINGSSL_PKCS8_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_pkcs8_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_pkcs8_test_lib.a
 endif
 
 
@@ -5110,7 +5141,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_poly1305_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DE
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_poly1305_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_poly1305_test_lib.a $(LIBBORINGSSL_POLY1305_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_poly1305_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_poly1305_test_lib.a
 endif
 
 
@@ -5138,7 +5169,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_refcount_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSS
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_refcount_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_refcount_test_lib.a $(LIBBORINGSSL_REFCOUNT_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_refcount_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_refcount_test_lib.a
 endif
 
 
@@ -5173,7 +5204,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_rsa_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_rsa_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_rsa_test_lib.a $(LIBBORINGSSL_RSA_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_rsa_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_rsa_test_lib.a
 endif
 
 
@@ -5201,7 +5232,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_thread_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_thread_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_thread_test_lib.a $(LIBBORINGSSL_THREAD_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_thread_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_thread_test_lib.a
 endif
 
 
@@ -5227,7 +5258,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_pkcs7_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_P
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_pkcs7_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_pkcs7_test_lib.a $(LIBBORINGSSL_PKCS7_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_pkcs7_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_pkcs7_test_lib.a
 endif
 
 
@@ -5253,7 +5284,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_tab_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_TAB
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_tab_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_tab_test_lib.a $(LIBBORINGSSL_TAB_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_tab_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_tab_test_lib.a
 endif
 
 
@@ -5279,7 +5310,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_v3name_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_v3name_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_v3name_test_lib.a $(LIBBORINGSSL_V3NAME_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_v3name_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_v3name_test_lib.a
 endif
 
 
@@ -5305,7 +5336,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_pqueue_test_lib.a: $(ZLIB_DEP)  $(LIBBORINGSSL_
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_pqueue_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_pqueue_test_lib.a $(LIBBORINGSSL_PQUEUE_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_pqueue_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_pqueue_test_lib.a
 endif
 
 
@@ -5340,7 +5371,7 @@ $(LIBDIR)/$(CONFIG)/libboringssl_ssl_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_ssl_test_lib.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_ssl_test_lib.a $(LIBBORINGSSL_SSL_TEST_LIB_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libboringssl_ssl_test_lib.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_ssl_test_lib.a
 endif
 
 
@@ -5381,7 +5412,7 @@ $(LIBDIR)/$(CONFIG)/libz.a:  $(LIBZ_OBJS)
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libz.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libz.a $(LIBZ_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libz.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libz.a
 endif
 
 
@@ -5415,7 +5446,7 @@ $(LIBDIR)/$(CONFIG)/libbad_client_test.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(LIBBAD_CL
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libbad_client_test.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libbad_client_test.a $(LIBBAD_CLIENT_TEST_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libbad_client_test.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libbad_client_test.a
 endif
 
 
@@ -5453,7 +5484,7 @@ $(LIBDIR)/$(CONFIG)/libbad_ssl_test_server.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(LIBBA
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libbad_ssl_test_server.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libbad_ssl_test_server.a $(LIBBAD_SSL_TEST_SERVER_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libbad_ssl_test_server.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libbad_ssl_test_server.a
 endif
 
 
@@ -5527,7 +5558,7 @@ $(LIBDIR)/$(CONFIG)/libend2end_tests.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(LIBEND2END_
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libend2end_tests.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libend2end_tests.a $(LIBEND2END_TESTS_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libend2end_tests.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libend2end_tests.a
 endif
 
 
@@ -5590,7 +5621,7 @@ $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a: $(ZLIB_DEP)  $(LIBEND2END_NOSEC_TE
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a $(LIBEND2END_NOSEC_TESTS_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a
 endif
 
 
@@ -5626,7 +5657,7 @@ $(LIBDIR)/$(CONFIG)/libend2end_certs.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(LIBEND2END_
 	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libend2end_certs.a
 	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libend2end_certs.a $(LIBEND2END_CERTS_OBJS) 
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib $(LIBDIR)/$(CONFIG)/libend2end_certs.a
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libend2end_certs.a
 endif
 
 
@@ -5838,7 +5869,7 @@ endif
 
 
 CENSUS_LOG_TEST_SRC = \
-    test/core/census/log_test.c \
+    test/core/census/mlog_test.c \
 
 CENSUS_LOG_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(CENSUS_LOG_TEST_SRC))))
 ifeq ($(NO_SECURE),true)
@@ -5858,7 +5889,7 @@ $(BINDIR)/$(CONFIG)/census_log_test: $(CENSUS_LOG_TEST_OBJS) $(LIBDIR)/$(CONFIG)
 
 endif
 
-$(OBJDIR)/$(CONFIG)/test/core/census/log_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+$(OBJDIR)/$(CONFIG)/test/core/census/mlog_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 
 deps_census_log_test: $(CENSUS_LOG_TEST_OBJS:.o=.dep)
 
@@ -9710,6 +9741,53 @@ ifneq ($(NO_DEPS),true)
 endif
 
 
+GRPCLB_API_TEST_SRC = \
+    $(GENDIR)/src/proto/grpc/lb/v0/load_balancer.pb.cc $(GENDIR)/src/proto/grpc/lb/v0/load_balancer.grpc.pb.cc \
+    test/cpp/grpclb/grpclb_api_test.cc \
+
+GRPCLB_API_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(GRPCLB_API_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/grpclb_api_test: openssl_dep_error
+
+else
+
+
+
+
+ifeq ($(NO_PROTOBUF),true)
+
+# You can't build the protoc plugins or protobuf-enabled targets if you don't have protobuf 3.0.0+.
+
+$(BINDIR)/$(CONFIG)/grpclb_api_test: protobuf_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/grpclb_api_test: $(PROTOBUF_DEP) $(GRPCLB_API_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LDXX) $(LDFLAGS) $(GRPCLB_API_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) $(GTEST_LIB) -o $(BINDIR)/$(CONFIG)/grpclb_api_test
+
+endif
+
+endif
+
+$(OBJDIR)/$(CONFIG)/src/proto/grpc/lb/v0/load_balancer.o:  $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a
+
+$(OBJDIR)/$(CONFIG)/test/cpp/grpclb/grpclb_api_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a
+
+deps_grpclb_api_test: $(GRPCLB_API_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(GRPCLB_API_TEST_OBJS:.o=.dep)
+endif
+endif
+$(OBJDIR)/$(CONFIG)/test/cpp/grpclb/grpclb_api_test.o: $(GENDIR)/src/proto/grpc/lb/v0/load_balancer.pb.cc $(GENDIR)/src/proto/grpc/lb/v0/load_balancer.grpc.pb.cc
+
+
 HYBRID_END2END_TEST_SRC = \
     test/cpp/end2end/hybrid_end2end_test.cc \
 
@@ -13015,6 +13093,7 @@ test/cpp/util/create_test_channel.cc: $(OPENSSL_DEP)
 test/cpp/util/string_ref_helper.cc: $(OPENSSL_DEP)
 test/cpp/util/subprocess.cc: $(OPENSSL_DEP)
 test/cpp/util/test_config.cc: $(OPENSSL_DEP)
+test/cpp/util/test_credentials_provider.cc: $(OPENSSL_DEP)
 endif
 
 .PHONY: all strip tools dep_error openssl_dep_error openssl_dep_message git_update stop buildtests buildtests_c buildtests_cxx test test_c test_cxx install install_c install_cxx install-headers install-headers_c install-headers_cxx install-shared install-shared_c install-shared_cxx install-static install-static_c install-static_cxx strip strip-shared strip-static strip_c strip-shared_c strip-static_c strip_cxx strip-shared_cxx strip-static_cxx dep_c dep_cxx bins_dep_c bins_dep_cxx clean
diff --git a/binding.gyp b/binding.gyp
index 950e0dfe22abfb2093cdacd5609d502904d1d26c..35eede15d7a28131d85b488c9cd586f2464d296c 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -557,27 +557,6 @@
         'gpr',
       ],
       'sources': [
-        'src/core/httpcli/httpcli_security_connector.c',
-        'src/core/security/base64.c',
-        'src/core/security/client_auth_filter.c',
-        'src/core/security/credentials.c',
-        'src/core/security/credentials_metadata.c',
-        'src/core/security/credentials_posix.c',
-        'src/core/security/credentials_win32.c',
-        'src/core/security/google_default_credentials.c',
-        'src/core/security/handshake.c',
-        'src/core/security/json_token.c',
-        'src/core/security/jwt_verifier.c',
-        'src/core/security/secure_endpoint.c',
-        'src/core/security/security_connector.c',
-        'src/core/security/security_context.c',
-        'src/core/security/server_auth_filter.c',
-        'src/core/security/server_secure_chttp2.c',
-        'src/core/surface/init_secure.c',
-        'src/core/surface/secure_channel_create.c',
-        'src/core/tsi/fake_transport_security.c',
-        'src/core/tsi/ssl_transport_security.c',
-        'src/core/tsi/transport_security.c',
         'src/core/census/grpc_context.c',
         'src/core/census/grpc_filter.c',
         'src/core/channel/channel_args.c',
@@ -593,6 +572,7 @@
         'src/core/client_config/connector.c',
         'src/core/client_config/default_initial_connect_string.c',
         'src/core/client_config/initial_connect_string.c',
+        'src/core/client_config/lb_policies/load_balancer_api.c',
         'src/core/client_config/lb_policies/pick_first.c',
         'src/core/client_config/lb_policies/round_robin.c',
         'src/core/client_config/lb_policy.c',
@@ -657,6 +637,7 @@
         'src/core/json/json_reader.c',
         'src/core/json/json_string.c',
         'src/core/json/json_writer.c',
+        'src/core/proto/grpc/lb/v0/load_balancer.pb.c',
         'src/core/surface/alarm.c',
         'src/core/surface/api_trace.c',
         'src/core/surface/byte_buffer.c',
@@ -706,12 +687,36 @@
         'src/core/transport/static_metadata.c',
         'src/core/transport/transport.c',
         'src/core/transport/transport_op_string.c',
+        'src/core/httpcli/httpcli_security_connector.c',
+        'src/core/security/base64.c',
+        'src/core/security/client_auth_filter.c',
+        'src/core/security/credentials.c',
+        'src/core/security/credentials_metadata.c',
+        'src/core/security/credentials_posix.c',
+        'src/core/security/credentials_win32.c',
+        'src/core/security/google_default_credentials.c',
+        'src/core/security/handshake.c',
+        'src/core/security/json_token.c',
+        'src/core/security/jwt_verifier.c',
+        'src/core/security/secure_endpoint.c',
+        'src/core/security/security_connector.c',
+        'src/core/security/security_context.c',
+        'src/core/security/server_auth_filter.c',
+        'src/core/security/server_secure_chttp2.c',
+        'src/core/surface/init_secure.c',
+        'src/core/surface/secure_channel_create.c',
+        'src/core/tsi/fake_transport_security.c',
+        'src/core/tsi/ssl_transport_security.c',
+        'src/core/tsi/transport_security.c',
         'src/core/census/context.c',
         'src/core/census/initialize.c',
-        'src/core/census/log.c',
+        'src/core/census/mlog.c',
         'src/core/census/operation.c',
         'src/core/census/placeholders.c',
         'src/core/census/tracing.c',
+        'third_party/nanopb/pb_common.c',
+        'third_party/nanopb/pb_decode.c',
+        'third_party/nanopb/pb_encode.c',
       ],
       "conditions": [
         ['OS == "mac"', {
diff --git a/build.yaml b/build.yaml
index f899f8524dd302e67ec05202585fbcf255f2d529..b16cb162d4d51632fdad1d9bcf62f5756b1ac340 100644
--- a/build.yaml
+++ b/build.yaml
@@ -14,12 +14,12 @@ filegroups:
   - include/grpc/census.h
   headers:
   - src/core/census/aggregation.h
-  - src/core/census/log.h
+  - src/core/census/mlog.h
   - src/core/census/rpc_metric_id.h
   src:
   - src/core/census/context.c
   - src/core/census/initialize.c
-  - src/core/census/log.c
+  - src/core/census/mlog.c
   - src/core/census/operation.c
   - src/core/census/placeholders.c
   - src/core/census/tracing.c
@@ -258,6 +258,7 @@ filegroups:
   - src/core/client_config/client_config.h
   - src/core/client_config/connector.h
   - src/core/client_config/initial_connect_string.h
+  - src/core/client_config/lb_policies/load_balancer_api.h
   - src/core/client_config/lb_policies/pick_first.h
   - src/core/client_config/lb_policies/round_robin.h
   - src/core/client_config/lb_policy.h
@@ -318,6 +319,7 @@ filegroups:
   - src/core/json/json_common.h
   - src/core/json/json_reader.h
   - src/core/json/json_writer.h
+  - src/core/proto/grpc/lb/v0/load_balancer.pb.h
   - src/core/statistics/census_interface.h
   - src/core/statistics/census_rpc_stats.h
   - src/core/surface/api_trace.h
@@ -373,6 +375,7 @@ filegroups:
   - src/core/client_config/connector.c
   - src/core/client_config/default_initial_connect_string.c
   - src/core/client_config/initial_connect_string.c
+  - src/core/client_config/lb_policies/load_balancer_api.c
   - src/core/client_config/lb_policies/pick_first.c
   - src/core/client_config/lb_policies/round_robin.c
   - src/core/client_config/lb_policy.c
@@ -437,6 +440,7 @@ filegroups:
   - src/core/json/json_reader.c
   - src/core/json/json_string.c
   - src/core/json/json_writer.c
+  - src/core/proto/grpc/lb/v0/load_balancer.pb.c
   - src/core/surface/alarm.c
   - src/core/surface/api_trace.c
   - src/core/surface/byte_buffer.c
@@ -494,6 +498,44 @@ filegroups:
   - include/grpc/impl/codegen/grpc_types.h
   - include/grpc/impl/codegen/propagation_bits.h
   - include/grpc/impl/codegen/status.h
+- name: grpc_secure
+  headers:
+  - src/core/security/auth_filters.h
+  - src/core/security/base64.h
+  - src/core/security/credentials.h
+  - src/core/security/handshake.h
+  - src/core/security/json_token.h
+  - src/core/security/jwt_verifier.h
+  - src/core/security/secure_endpoint.h
+  - src/core/security/security_connector.h
+  - src/core/security/security_context.h
+  - src/core/tsi/fake_transport_security.h
+  - src/core/tsi/ssl_transport_security.h
+  - src/core/tsi/ssl_types.h
+  - src/core/tsi/transport_security.h
+  - src/core/tsi/transport_security_interface.h
+  src:
+  - src/core/httpcli/httpcli_security_connector.c
+  - src/core/security/base64.c
+  - src/core/security/client_auth_filter.c
+  - src/core/security/credentials.c
+  - src/core/security/credentials_metadata.c
+  - src/core/security/credentials_posix.c
+  - src/core/security/credentials_win32.c
+  - src/core/security/google_default_credentials.c
+  - src/core/security/handshake.c
+  - src/core/security/json_token.c
+  - src/core/security/jwt_verifier.c
+  - src/core/security/secure_endpoint.c
+  - src/core/security/security_connector.c
+  - src/core/security/security_context.c
+  - src/core/security/server_auth_filter.c
+  - src/core/security/server_secure_chttp2.c
+  - src/core/surface/init_secure.c
+  - src/core/surface/secure_channel_create.c
+  - src/core/tsi/fake_transport_security.c
+  - src/core/tsi/ssl_transport_security.c
+  - src/core/tsi/transport_security.c
 - name: grpc_test_util_base
   headers:
   - test/core/end2end/cq_verifier.h
@@ -512,6 +554,16 @@ filegroups:
   - test/core/util/port_posix.c
   - test/core/util/port_windows.c
   - test/core/util/slice_splitter.c
+- name: nanopb
+  headers:
+  - third_party/nanopb/pb.h
+  - third_party/nanopb/pb_common.h
+  - third_party/nanopb/pb_decode.h
+  - third_party/nanopb/pb_encode.h
+  src:
+  - third_party/nanopb/pb_common.c
+  - third_party/nanopb/pb_decode.c
+  - third_party/nanopb/pb_encode.c
 libs:
 - name: gpr
   build: all
@@ -537,43 +589,6 @@ libs:
   language: c
   public_headers:
   - include/grpc/grpc_security.h
-  headers:
-  - src/core/security/auth_filters.h
-  - src/core/security/base64.h
-  - src/core/security/credentials.h
-  - src/core/security/handshake.h
-  - src/core/security/json_token.h
-  - src/core/security/jwt_verifier.h
-  - src/core/security/secure_endpoint.h
-  - src/core/security/security_connector.h
-  - src/core/security/security_context.h
-  - src/core/tsi/fake_transport_security.h
-  - src/core/tsi/ssl_transport_security.h
-  - src/core/tsi/ssl_types.h
-  - src/core/tsi/transport_security.h
-  - src/core/tsi/transport_security_interface.h
-  src:
-  - src/core/httpcli/httpcli_security_connector.c
-  - src/core/security/base64.c
-  - src/core/security/client_auth_filter.c
-  - src/core/security/credentials.c
-  - src/core/security/credentials_metadata.c
-  - src/core/security/credentials_posix.c
-  - src/core/security/credentials_win32.c
-  - src/core/security/google_default_credentials.c
-  - src/core/security/handshake.c
-  - src/core/security/json_token.c
-  - src/core/security/jwt_verifier.c
-  - src/core/security/secure_endpoint.c
-  - src/core/security/security_connector.c
-  - src/core/security/security_context.c
-  - src/core/security/server_auth_filter.c
-  - src/core/security/server_secure_chttp2.c
-  - src/core/surface/init_secure.c
-  - src/core/surface/secure_channel_create.c
-  - src/core/tsi/fake_transport_security.c
-  - src/core/tsi/ssl_transport_security.c
-  - src/core/tsi/transport_security.c
   deps:
   - gpr
   baselib: true
@@ -582,12 +597,35 @@ libs:
   filegroups:
   - grpc_codegen
   - grpc_base
+  - grpc_secure
   - census
+  - nanopb
   secure: true
   vs_packages:
   - grpc.dependencies.openssl
   - grpc.dependencies.zlib
   vs_project_guid: '{29D16885-7228-4C31-81ED-5F9187C7F2A9}'
+- name: grpc_dll
+  build: private
+  language: c
+  src: []
+  deps:
+  - gpr
+  - grpc
+  build_system:
+  - visual_studio
+  deps_linkage: static
+  dll_def: grpc.def
+  vs_config_type: DynamicLibrary
+  vs_packages:
+  - grpc.dependencies.openssl
+  - grpc.dependencies.zlib
+  vs_project_guid: '{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}'
+  vs_props:
+  - zlib
+  - openssl
+  - winsock
+  - global
 - name: grpc_test_util
   build: private
   language: c
@@ -631,6 +669,7 @@ libs:
   - grpc_base
   - grpc_codegen
   - census
+  - nanopb
   secure: false
   vs_project_guid: '{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}'
 - name: grpc_zookeeper
@@ -715,6 +754,7 @@ libs:
   - test/cpp/util/create_test_channel.h
   - test/cpp/util/string_ref_helper.h
   - test/cpp/util/subprocess.h
+  - test/cpp/util/test_credentials_provider.h
   src:
   - src/proto/grpc/testing/echo_messages.proto
   - src/proto/grpc/testing/echo.proto
@@ -725,6 +765,7 @@ libs:
   - test/cpp/util/create_test_channel.cc
   - test/cpp/util/string_ref_helper.cc
   - test/cpp/util/subprocess.cc
+  - test/cpp/util/test_credentials_provider.cc
   deps:
   - grpc++
   - grpc_test_util
@@ -775,6 +816,8 @@ libs:
   - gpr_codegen
   secure: false
   vs_project_guid: '{B6E81D84-2ACB-41B8-8781-493A944C7817}'
+  vs_props:
+  - protoc
 - name: interop_client_helper
   build: private
   language: c++
@@ -958,7 +1001,7 @@ targets:
   build: test
   language: c
   src:
-  - test/core/census/log_test.c
+  - test/core/census/mlog_test.c
   deps:
   - grpc_test_util
   - grpc
@@ -2185,6 +2228,17 @@ targets:
   secure: false
   vs_config_type: Application
   vs_project_guid: '{069E9D05-B78B-4751-9252-D21EBAE7DE8E}'
+- name: grpclb_api_test
+  build: test
+  language: c++
+  src:
+  - src/proto/grpc/lb/v0/load_balancer.proto
+  - test/cpp/grpclb/grpclb_api_test.cc
+  deps:
+  - grpc++_test_util
+  - grpc_test_util
+  - grpc++
+  - grpc
 - name: hybrid_end2end_test
   build: test
   language: c++
@@ -2309,6 +2363,7 @@ targets:
   - linux
   - posix
 - name: qps_openloop_test
+  cpu_cost: 10
   build: test
   language: c++
   src:
@@ -2341,8 +2396,6 @@ targets:
   - gpr_test_util
   - gpr
   - grpc++_test_config
-  exclude_configs:
-  - tsan
   platforms:
   - mac
   - linux
@@ -2630,7 +2683,7 @@ configs:
     test_environ:
       ASAN_OPTIONS: detect_leaks=1:color=always
       LSAN_OPTIONS: suppressions=tools/lsan_suppressions.txt:report_objects=1
-    timeout_multiplier: 1.5
+    timeout_multiplier: 3
   asan-noleaks:
     CC: clang
     CPPFLAGS: -O0 -fsanitize=address -fno-omit-frame-pointer -Wno-unused-command-line-argument
@@ -2642,7 +2695,7 @@ configs:
     compile_the_world: true
     test_environ:
       ASAN_OPTIONS: detect_leaks=0:color=always
-    timeout_multiplier: 1.5
+    timeout_multiplier: 3
   basicprof:
     CPPFLAGS: -O2 -DGRPC_BASIC_PROFILER -DGRPC_TIMERS_RDTSC
     DEFINES: NDEBUG
@@ -2681,7 +2734,7 @@ configs:
       -fPIE -pie $(if $(JENKINS_BUILD),-Wl$(comma)-Ttext-segment=0x7e0000000000,)
     LDXX: clang++
     compile_the_world: true
-    timeout_multiplier: 2
+    timeout_multiplier: 4
   mutrace:
     CPPFLAGS: -O0
     DEFINES: _DEBUG DEBUG
@@ -2703,7 +2756,7 @@ configs:
     compile_the_world: true
     test_environ:
       TSAN_OPTIONS: suppressions=tools/tsan_suppressions.txt:halt_on_error=1:second_deadlock_stack=1
-    timeout_multiplier: 2
+    timeout_multiplier: 5
   ubsan:
     CC: clang
     CPPFLAGS: -O1 -fsanitize=undefined -fno-omit-frame-pointer -Wno-unused-command-line-argument
@@ -2762,6 +2815,34 @@ node_modules:
   - src/node/ext/server.cc
   - src/node/ext/server_credentials.cc
   - src/node/ext/timeval.cc
+php_config_m4:
+  deps:
+  - grpc
+  - gpr
+  - boringssl
+  - z
+  headers:
+  - src/php/ext/grpc/byte_buffer.h
+  - src/php/ext/grpc/call.h
+  - src/php/ext/grpc/call_credentials.h
+  - src/php/ext/grpc/channel.h
+  - src/php/ext/grpc/channel_credentials.h
+  - src/php/ext/grpc/completion_queue.h
+  - src/php/ext/grpc/php_grpc.h
+  - src/php/ext/grpc/server.h
+  - src/php/ext/grpc/server_credentials.h
+  - src/php/ext/grpc/timeval.h
+  src:
+  - src/php/ext/grpc/byte_buffer.c
+  - src/php/ext/grpc/call.c
+  - src/php/ext/grpc/call_credentials.c
+  - src/php/ext/grpc/channel.c
+  - src/php/ext/grpc/channel_credentials.c
+  - src/php/ext/grpc/completion_queue.c
+  - src/php/ext/grpc/php_grpc.c
+  - src/php/ext/grpc/server.c
+  - src/php/ext/grpc/server_credentials.c
+  - src/php/ext/grpc/timeval.c
 python_dependencies:
   deps:
   - grpc
diff --git a/config.m4 b/config.m4
new file mode 100644
index 0000000000000000000000000000000000000000..0323d5d2ad3b65392989b1ca104317b44fcd3747
--- /dev/null
+++ b/config.m4
@@ -0,0 +1,554 @@
+PHP_ARG_ENABLE(grpc, whether to enable grpc support,
+[  --enable-grpc           Enable grpc support])
+
+if test "$PHP_GRPC" != "no"; then
+  dnl Write more examples of tests here...
+
+  dnl # --with-grpc -> add include path
+  PHP_ADD_INCLUDE(../../grpc/include)
+  PHP_ADD_INCLUDE(../../grpc/src/php/ext/grpc)
+  PHP_ADD_INCLUDE(../../grpc/third_party/boringssl/include)
+
+  LIBS="-lpthread $LIBS"
+
+  GRPC_SHARED_LIBADD="-lpthread $GRPC_SHARED_LIBADD"
+  PHP_ADD_LIBRARY(pthread)
+
+  PHP_ADD_LIBRARY(dl,,GRPC_SHARED_LIBADD)
+  PHP_ADD_LIBRARY(dl)
+
+  case $host in
+    *darwin*) ;;
+    *)
+      PHP_ADD_LIBRARY(rt,,GRPC_SHARED_LIBADD)
+      PHP_ADD_LIBRARY(rt)
+      ;;
+  esac
+
+  PHP_NEW_EXTENSION(grpc,
+    src/php/ext/grpc/byte_buffer.c \
+    src/php/ext/grpc/call.c \
+    src/php/ext/grpc/call_credentials.c \
+    src/php/ext/grpc/channel.c \
+    src/php/ext/grpc/channel_credentials.c \
+    src/php/ext/grpc/completion_queue.c \
+    src/php/ext/grpc/php_grpc.c \
+    src/php/ext/grpc/server.c \
+    src/php/ext/grpc/server_credentials.c \
+    src/php/ext/grpc/timeval.c \
+    src/core/profiling/basic_timers.c \
+    src/core/profiling/stap_timers.c \
+    src/core/support/alloc.c \
+    src/core/support/avl.c \
+    src/core/support/cmdline.c \
+    src/core/support/cpu_iphone.c \
+    src/core/support/cpu_linux.c \
+    src/core/support/cpu_posix.c \
+    src/core/support/cpu_windows.c \
+    src/core/support/env_linux.c \
+    src/core/support/env_posix.c \
+    src/core/support/env_win32.c \
+    src/core/support/file.c \
+    src/core/support/file_posix.c \
+    src/core/support/file_win32.c \
+    src/core/support/histogram.c \
+    src/core/support/host_port.c \
+    src/core/support/log.c \
+    src/core/support/log_android.c \
+    src/core/support/log_linux.c \
+    src/core/support/log_posix.c \
+    src/core/support/log_win32.c \
+    src/core/support/murmur_hash.c \
+    src/core/support/slice.c \
+    src/core/support/slice_buffer.c \
+    src/core/support/stack_lockfree.c \
+    src/core/support/string.c \
+    src/core/support/string_posix.c \
+    src/core/support/string_win32.c \
+    src/core/support/subprocess_posix.c \
+    src/core/support/subprocess_windows.c \
+    src/core/support/sync.c \
+    src/core/support/sync_posix.c \
+    src/core/support/sync_win32.c \
+    src/core/support/thd.c \
+    src/core/support/thd_posix.c \
+    src/core/support/thd_win32.c \
+    src/core/support/time.c \
+    src/core/support/time_posix.c \
+    src/core/support/time_precise.c \
+    src/core/support/time_win32.c \
+    src/core/support/tls_pthread.c \
+    src/core/support/wrap_memcpy.c \
+    src/core/census/grpc_context.c \
+    src/core/census/grpc_filter.c \
+    src/core/channel/channel_args.c \
+    src/core/channel/channel_stack.c \
+    src/core/channel/client_channel.c \
+    src/core/channel/client_uchannel.c \
+    src/core/channel/compress_filter.c \
+    src/core/channel/connected_channel.c \
+    src/core/channel/http_client_filter.c \
+    src/core/channel/http_server_filter.c \
+    src/core/channel/subchannel_call_holder.c \
+    src/core/client_config/client_config.c \
+    src/core/client_config/connector.c \
+    src/core/client_config/default_initial_connect_string.c \
+    src/core/client_config/initial_connect_string.c \
+    src/core/client_config/lb_policies/load_balancer_api.c \
+    src/core/client_config/lb_policies/pick_first.c \
+    src/core/client_config/lb_policies/round_robin.c \
+    src/core/client_config/lb_policy.c \
+    src/core/client_config/lb_policy_factory.c \
+    src/core/client_config/lb_policy_registry.c \
+    src/core/client_config/resolver.c \
+    src/core/client_config/resolver_factory.c \
+    src/core/client_config/resolver_registry.c \
+    src/core/client_config/resolvers/dns_resolver.c \
+    src/core/client_config/resolvers/sockaddr_resolver.c \
+    src/core/client_config/subchannel.c \
+    src/core/client_config/subchannel_factory.c \
+    src/core/client_config/subchannel_index.c \
+    src/core/client_config/uri_parser.c \
+    src/core/compression/algorithm.c \
+    src/core/compression/message_compress.c \
+    src/core/debug/trace.c \
+    src/core/httpcli/format_request.c \
+    src/core/httpcli/httpcli.c \
+    src/core/httpcli/parser.c \
+    src/core/iomgr/closure.c \
+    src/core/iomgr/endpoint.c \
+    src/core/iomgr/endpoint_pair_posix.c \
+    src/core/iomgr/endpoint_pair_windows.c \
+    src/core/iomgr/exec_ctx.c \
+    src/core/iomgr/executor.c \
+    src/core/iomgr/fd_posix.c \
+    src/core/iomgr/iocp_windows.c \
+    src/core/iomgr/iomgr.c \
+    src/core/iomgr/iomgr_posix.c \
+    src/core/iomgr/iomgr_windows.c \
+    src/core/iomgr/pollset_multipoller_with_epoll.c \
+    src/core/iomgr/pollset_multipoller_with_poll_posix.c \
+    src/core/iomgr/pollset_posix.c \
+    src/core/iomgr/pollset_set_posix.c \
+    src/core/iomgr/pollset_set_windows.c \
+    src/core/iomgr/pollset_windows.c \
+    src/core/iomgr/resolve_address_posix.c \
+    src/core/iomgr/resolve_address_windows.c \
+    src/core/iomgr/sockaddr_utils.c \
+    src/core/iomgr/socket_utils_common_posix.c \
+    src/core/iomgr/socket_utils_linux.c \
+    src/core/iomgr/socket_utils_posix.c \
+    src/core/iomgr/socket_windows.c \
+    src/core/iomgr/tcp_client_posix.c \
+    src/core/iomgr/tcp_client_windows.c \
+    src/core/iomgr/tcp_posix.c \
+    src/core/iomgr/tcp_server_posix.c \
+    src/core/iomgr/tcp_server_windows.c \
+    src/core/iomgr/tcp_windows.c \
+    src/core/iomgr/time_averaged_stats.c \
+    src/core/iomgr/timer.c \
+    src/core/iomgr/timer_heap.c \
+    src/core/iomgr/udp_server.c \
+    src/core/iomgr/wakeup_fd_eventfd.c \
+    src/core/iomgr/wakeup_fd_nospecial.c \
+    src/core/iomgr/wakeup_fd_pipe.c \
+    src/core/iomgr/wakeup_fd_posix.c \
+    src/core/iomgr/workqueue_posix.c \
+    src/core/iomgr/workqueue_windows.c \
+    src/core/json/json.c \
+    src/core/json/json_reader.c \
+    src/core/json/json_string.c \
+    src/core/json/json_writer.c \
+    src/core/proto/grpc/lb/v0/load_balancer.pb.c \
+    src/core/surface/alarm.c \
+    src/core/surface/api_trace.c \
+    src/core/surface/byte_buffer.c \
+    src/core/surface/byte_buffer_reader.c \
+    src/core/surface/call.c \
+    src/core/surface/call_details.c \
+    src/core/surface/call_log_batch.c \
+    src/core/surface/channel.c \
+    src/core/surface/channel_connectivity.c \
+    src/core/surface/channel_create.c \
+    src/core/surface/channel_ping.c \
+    src/core/surface/completion_queue.c \
+    src/core/surface/event_string.c \
+    src/core/surface/init.c \
+    src/core/surface/lame_client.c \
+    src/core/surface/metadata_array.c \
+    src/core/surface/server.c \
+    src/core/surface/server_chttp2.c \
+    src/core/surface/server_create.c \
+    src/core/surface/validate_metadata.c \
+    src/core/surface/version.c \
+    src/core/transport/byte_stream.c \
+    src/core/transport/chttp2/alpn.c \
+    src/core/transport/chttp2/bin_encoder.c \
+    src/core/transport/chttp2/frame_data.c \
+    src/core/transport/chttp2/frame_goaway.c \
+    src/core/transport/chttp2/frame_ping.c \
+    src/core/transport/chttp2/frame_rst_stream.c \
+    src/core/transport/chttp2/frame_settings.c \
+    src/core/transport/chttp2/frame_window_update.c \
+    src/core/transport/chttp2/hpack_encoder.c \
+    src/core/transport/chttp2/hpack_parser.c \
+    src/core/transport/chttp2/hpack_table.c \
+    src/core/transport/chttp2/huffsyms.c \
+    src/core/transport/chttp2/incoming_metadata.c \
+    src/core/transport/chttp2/parsing.c \
+    src/core/transport/chttp2/status_conversion.c \
+    src/core/transport/chttp2/stream_lists.c \
+    src/core/transport/chttp2/stream_map.c \
+    src/core/transport/chttp2/timeout_encoding.c \
+    src/core/transport/chttp2/varint.c \
+    src/core/transport/chttp2/writing.c \
+    src/core/transport/chttp2_transport.c \
+    src/core/transport/connectivity_state.c \
+    src/core/transport/metadata.c \
+    src/core/transport/metadata_batch.c \
+    src/core/transport/static_metadata.c \
+    src/core/transport/transport.c \
+    src/core/transport/transport_op_string.c \
+    src/core/httpcli/httpcli_security_connector.c \
+    src/core/security/base64.c \
+    src/core/security/client_auth_filter.c \
+    src/core/security/credentials.c \
+    src/core/security/credentials_metadata.c \
+    src/core/security/credentials_posix.c \
+    src/core/security/credentials_win32.c \
+    src/core/security/google_default_credentials.c \
+    src/core/security/handshake.c \
+    src/core/security/json_token.c \
+    src/core/security/jwt_verifier.c \
+    src/core/security/secure_endpoint.c \
+    src/core/security/security_connector.c \
+    src/core/security/security_context.c \
+    src/core/security/server_auth_filter.c \
+    src/core/security/server_secure_chttp2.c \
+    src/core/surface/init_secure.c \
+    src/core/surface/secure_channel_create.c \
+    src/core/tsi/fake_transport_security.c \
+    src/core/tsi/ssl_transport_security.c \
+    src/core/tsi/transport_security.c \
+    src/core/census/context.c \
+    src/core/census/initialize.c \
+    src/core/census/mlog.c \
+    src/core/census/operation.c \
+    src/core/census/placeholders.c \
+    src/core/census/tracing.c \
+    third_party/nanopb/pb_common.c \
+    third_party/nanopb/pb_decode.c \
+    third_party/nanopb/pb_encode.c \
+    src/boringssl/err_data.c \
+    third_party/boringssl/crypto/aes/aes.c \
+    third_party/boringssl/crypto/aes/mode_wrappers.c \
+    third_party/boringssl/crypto/asn1/a_bitstr.c \
+    third_party/boringssl/crypto/asn1/a_bool.c \
+    third_party/boringssl/crypto/asn1/a_bytes.c \
+    third_party/boringssl/crypto/asn1/a_d2i_fp.c \
+    third_party/boringssl/crypto/asn1/a_dup.c \
+    third_party/boringssl/crypto/asn1/a_enum.c \
+    third_party/boringssl/crypto/asn1/a_gentm.c \
+    third_party/boringssl/crypto/asn1/a_i2d_fp.c \
+    third_party/boringssl/crypto/asn1/a_int.c \
+    third_party/boringssl/crypto/asn1/a_mbstr.c \
+    third_party/boringssl/crypto/asn1/a_object.c \
+    third_party/boringssl/crypto/asn1/a_octet.c \
+    third_party/boringssl/crypto/asn1/a_print.c \
+    third_party/boringssl/crypto/asn1/a_strnid.c \
+    third_party/boringssl/crypto/asn1/a_time.c \
+    third_party/boringssl/crypto/asn1/a_type.c \
+    third_party/boringssl/crypto/asn1/a_utctm.c \
+    third_party/boringssl/crypto/asn1/a_utf8.c \
+    third_party/boringssl/crypto/asn1/asn1_lib.c \
+    third_party/boringssl/crypto/asn1/asn1_par.c \
+    third_party/boringssl/crypto/asn1/asn_pack.c \
+    third_party/boringssl/crypto/asn1/bio_asn1.c \
+    third_party/boringssl/crypto/asn1/bio_ndef.c \
+    third_party/boringssl/crypto/asn1/f_enum.c \
+    third_party/boringssl/crypto/asn1/f_int.c \
+    third_party/boringssl/crypto/asn1/f_string.c \
+    third_party/boringssl/crypto/asn1/t_bitst.c \
+    third_party/boringssl/crypto/asn1/t_pkey.c \
+    third_party/boringssl/crypto/asn1/tasn_dec.c \
+    third_party/boringssl/crypto/asn1/tasn_enc.c \
+    third_party/boringssl/crypto/asn1/tasn_fre.c \
+    third_party/boringssl/crypto/asn1/tasn_new.c \
+    third_party/boringssl/crypto/asn1/tasn_prn.c \
+    third_party/boringssl/crypto/asn1/tasn_typ.c \
+    third_party/boringssl/crypto/asn1/tasn_utl.c \
+    third_party/boringssl/crypto/asn1/x_bignum.c \
+    third_party/boringssl/crypto/asn1/x_long.c \
+    third_party/boringssl/crypto/base64/base64.c \
+    third_party/boringssl/crypto/bio/bio.c \
+    third_party/boringssl/crypto/bio/bio_mem.c \
+    third_party/boringssl/crypto/bio/buffer.c \
+    third_party/boringssl/crypto/bio/connect.c \
+    third_party/boringssl/crypto/bio/fd.c \
+    third_party/boringssl/crypto/bio/file.c \
+    third_party/boringssl/crypto/bio/hexdump.c \
+    third_party/boringssl/crypto/bio/pair.c \
+    third_party/boringssl/crypto/bio/printf.c \
+    third_party/boringssl/crypto/bio/socket.c \
+    third_party/boringssl/crypto/bio/socket_helper.c \
+    third_party/boringssl/crypto/bn/add.c \
+    third_party/boringssl/crypto/bn/asm/x86_64-gcc.c \
+    third_party/boringssl/crypto/bn/bn.c \
+    third_party/boringssl/crypto/bn/bn_asn1.c \
+    third_party/boringssl/crypto/bn/cmp.c \
+    third_party/boringssl/crypto/bn/convert.c \
+    third_party/boringssl/crypto/bn/ctx.c \
+    third_party/boringssl/crypto/bn/div.c \
+    third_party/boringssl/crypto/bn/exponentiation.c \
+    third_party/boringssl/crypto/bn/gcd.c \
+    third_party/boringssl/crypto/bn/generic.c \
+    third_party/boringssl/crypto/bn/kronecker.c \
+    third_party/boringssl/crypto/bn/montgomery.c \
+    third_party/boringssl/crypto/bn/mul.c \
+    third_party/boringssl/crypto/bn/prime.c \
+    third_party/boringssl/crypto/bn/random.c \
+    third_party/boringssl/crypto/bn/rsaz_exp.c \
+    third_party/boringssl/crypto/bn/shift.c \
+    third_party/boringssl/crypto/bn/sqrt.c \
+    third_party/boringssl/crypto/buf/buf.c \
+    third_party/boringssl/crypto/bytestring/ber.c \
+    third_party/boringssl/crypto/bytestring/cbb.c \
+    third_party/boringssl/crypto/bytestring/cbs.c \
+    third_party/boringssl/crypto/chacha/chacha_generic.c \
+    third_party/boringssl/crypto/chacha/chacha_vec.c \
+    third_party/boringssl/crypto/cipher/aead.c \
+    third_party/boringssl/crypto/cipher/cipher.c \
+    third_party/boringssl/crypto/cipher/derive_key.c \
+    third_party/boringssl/crypto/cipher/e_aes.c \
+    third_party/boringssl/crypto/cipher/e_chacha20poly1305.c \
+    third_party/boringssl/crypto/cipher/e_des.c \
+    third_party/boringssl/crypto/cipher/e_null.c \
+    third_party/boringssl/crypto/cipher/e_rc2.c \
+    third_party/boringssl/crypto/cipher/e_rc4.c \
+    third_party/boringssl/crypto/cipher/e_ssl3.c \
+    third_party/boringssl/crypto/cipher/e_tls.c \
+    third_party/boringssl/crypto/cipher/tls_cbc.c \
+    third_party/boringssl/crypto/cmac/cmac.c \
+    third_party/boringssl/crypto/conf/conf.c \
+    third_party/boringssl/crypto/cpu-arm.c \
+    third_party/boringssl/crypto/cpu-intel.c \
+    third_party/boringssl/crypto/crypto.c \
+    third_party/boringssl/crypto/curve25519/curve25519.c \
+    third_party/boringssl/crypto/des/des.c \
+    third_party/boringssl/crypto/dh/check.c \
+    third_party/boringssl/crypto/dh/dh.c \
+    third_party/boringssl/crypto/dh/dh_asn1.c \
+    third_party/boringssl/crypto/dh/params.c \
+    third_party/boringssl/crypto/digest/digest.c \
+    third_party/boringssl/crypto/digest/digests.c \
+    third_party/boringssl/crypto/directory_posix.c \
+    third_party/boringssl/crypto/directory_win.c \
+    third_party/boringssl/crypto/dsa/dsa.c \
+    third_party/boringssl/crypto/dsa/dsa_asn1.c \
+    third_party/boringssl/crypto/ec/ec.c \
+    third_party/boringssl/crypto/ec/ec_asn1.c \
+    third_party/boringssl/crypto/ec/ec_key.c \
+    third_party/boringssl/crypto/ec/ec_montgomery.c \
+    third_party/boringssl/crypto/ec/oct.c \
+    third_party/boringssl/crypto/ec/p224-64.c \
+    third_party/boringssl/crypto/ec/p256-64.c \
+    third_party/boringssl/crypto/ec/p256-x86_64.c \
+    third_party/boringssl/crypto/ec/simple.c \
+    third_party/boringssl/crypto/ec/util-64.c \
+    third_party/boringssl/crypto/ec/wnaf.c \
+    third_party/boringssl/crypto/ecdh/ecdh.c \
+    third_party/boringssl/crypto/ecdsa/ecdsa.c \
+    third_party/boringssl/crypto/ecdsa/ecdsa_asn1.c \
+    third_party/boringssl/crypto/engine/engine.c \
+    third_party/boringssl/crypto/err/err.c \
+    third_party/boringssl/crypto/evp/algorithm.c \
+    third_party/boringssl/crypto/evp/digestsign.c \
+    third_party/boringssl/crypto/evp/evp.c \
+    third_party/boringssl/crypto/evp/evp_asn1.c \
+    third_party/boringssl/crypto/evp/evp_ctx.c \
+    third_party/boringssl/crypto/evp/p_dsa_asn1.c \
+    third_party/boringssl/crypto/evp/p_ec.c \
+    third_party/boringssl/crypto/evp/p_ec_asn1.c \
+    third_party/boringssl/crypto/evp/p_rsa.c \
+    third_party/boringssl/crypto/evp/p_rsa_asn1.c \
+    third_party/boringssl/crypto/evp/pbkdf.c \
+    third_party/boringssl/crypto/evp/sign.c \
+    third_party/boringssl/crypto/ex_data.c \
+    third_party/boringssl/crypto/hkdf/hkdf.c \
+    third_party/boringssl/crypto/hmac/hmac.c \
+    third_party/boringssl/crypto/lhash/lhash.c \
+    third_party/boringssl/crypto/md4/md4.c \
+    third_party/boringssl/crypto/md5/md5.c \
+    third_party/boringssl/crypto/mem.c \
+    third_party/boringssl/crypto/modes/cbc.c \
+    third_party/boringssl/crypto/modes/cfb.c \
+    third_party/boringssl/crypto/modes/ctr.c \
+    third_party/boringssl/crypto/modes/gcm.c \
+    third_party/boringssl/crypto/modes/ofb.c \
+    third_party/boringssl/crypto/obj/obj.c \
+    third_party/boringssl/crypto/obj/obj_xref.c \
+    third_party/boringssl/crypto/pem/pem_all.c \
+    third_party/boringssl/crypto/pem/pem_info.c \
+    third_party/boringssl/crypto/pem/pem_lib.c \
+    third_party/boringssl/crypto/pem/pem_oth.c \
+    third_party/boringssl/crypto/pem/pem_pk8.c \
+    third_party/boringssl/crypto/pem/pem_pkey.c \
+    third_party/boringssl/crypto/pem/pem_x509.c \
+    third_party/boringssl/crypto/pem/pem_xaux.c \
+    third_party/boringssl/crypto/pkcs8/p5_pbe.c \
+    third_party/boringssl/crypto/pkcs8/p5_pbev2.c \
+    third_party/boringssl/crypto/pkcs8/p8_pkey.c \
+    third_party/boringssl/crypto/pkcs8/pkcs8.c \
+    third_party/boringssl/crypto/poly1305/poly1305.c \
+    third_party/boringssl/crypto/poly1305/poly1305_arm.c \
+    third_party/boringssl/crypto/poly1305/poly1305_vec.c \
+    third_party/boringssl/crypto/rand/rand.c \
+    third_party/boringssl/crypto/rand/urandom.c \
+    third_party/boringssl/crypto/rand/windows.c \
+    third_party/boringssl/crypto/rc4/rc4.c \
+    third_party/boringssl/crypto/refcount_c11.c \
+    third_party/boringssl/crypto/refcount_lock.c \
+    third_party/boringssl/crypto/rsa/blinding.c \
+    third_party/boringssl/crypto/rsa/padding.c \
+    third_party/boringssl/crypto/rsa/rsa.c \
+    third_party/boringssl/crypto/rsa/rsa_asn1.c \
+    third_party/boringssl/crypto/rsa/rsa_impl.c \
+    third_party/boringssl/crypto/sha/sha1.c \
+    third_party/boringssl/crypto/sha/sha256.c \
+    third_party/boringssl/crypto/sha/sha512.c \
+    third_party/boringssl/crypto/stack/stack.c \
+    third_party/boringssl/crypto/thread.c \
+    third_party/boringssl/crypto/thread_none.c \
+    third_party/boringssl/crypto/thread_pthread.c \
+    third_party/boringssl/crypto/thread_win.c \
+    third_party/boringssl/crypto/time_support.c \
+    third_party/boringssl/crypto/x509/a_digest.c \
+    third_party/boringssl/crypto/x509/a_sign.c \
+    third_party/boringssl/crypto/x509/a_strex.c \
+    third_party/boringssl/crypto/x509/a_verify.c \
+    third_party/boringssl/crypto/x509/asn1_gen.c \
+    third_party/boringssl/crypto/x509/by_dir.c \
+    third_party/boringssl/crypto/x509/by_file.c \
+    third_party/boringssl/crypto/x509/i2d_pr.c \
+    third_party/boringssl/crypto/x509/pkcs7.c \
+    third_party/boringssl/crypto/x509/t_crl.c \
+    third_party/boringssl/crypto/x509/t_req.c \
+    third_party/boringssl/crypto/x509/t_x509.c \
+    third_party/boringssl/crypto/x509/t_x509a.c \
+    third_party/boringssl/crypto/x509/x509.c \
+    third_party/boringssl/crypto/x509/x509_att.c \
+    third_party/boringssl/crypto/x509/x509_cmp.c \
+    third_party/boringssl/crypto/x509/x509_d2.c \
+    third_party/boringssl/crypto/x509/x509_def.c \
+    third_party/boringssl/crypto/x509/x509_ext.c \
+    third_party/boringssl/crypto/x509/x509_lu.c \
+    third_party/boringssl/crypto/x509/x509_obj.c \
+    third_party/boringssl/crypto/x509/x509_r2x.c \
+    third_party/boringssl/crypto/x509/x509_req.c \
+    third_party/boringssl/crypto/x509/x509_set.c \
+    third_party/boringssl/crypto/x509/x509_trs.c \
+    third_party/boringssl/crypto/x509/x509_txt.c \
+    third_party/boringssl/crypto/x509/x509_v3.c \
+    third_party/boringssl/crypto/x509/x509_vfy.c \
+    third_party/boringssl/crypto/x509/x509_vpm.c \
+    third_party/boringssl/crypto/x509/x509cset.c \
+    third_party/boringssl/crypto/x509/x509name.c \
+    third_party/boringssl/crypto/x509/x509rset.c \
+    third_party/boringssl/crypto/x509/x509spki.c \
+    third_party/boringssl/crypto/x509/x509type.c \
+    third_party/boringssl/crypto/x509/x_algor.c \
+    third_party/boringssl/crypto/x509/x_all.c \
+    third_party/boringssl/crypto/x509/x_attrib.c \
+    third_party/boringssl/crypto/x509/x_crl.c \
+    third_party/boringssl/crypto/x509/x_exten.c \
+    third_party/boringssl/crypto/x509/x_info.c \
+    third_party/boringssl/crypto/x509/x_name.c \
+    third_party/boringssl/crypto/x509/x_pkey.c \
+    third_party/boringssl/crypto/x509/x_pubkey.c \
+    third_party/boringssl/crypto/x509/x_req.c \
+    third_party/boringssl/crypto/x509/x_sig.c \
+    third_party/boringssl/crypto/x509/x_spki.c \
+    third_party/boringssl/crypto/x509/x_val.c \
+    third_party/boringssl/crypto/x509/x_x509.c \
+    third_party/boringssl/crypto/x509/x_x509a.c \
+    third_party/boringssl/crypto/x509v3/pcy_cache.c \
+    third_party/boringssl/crypto/x509v3/pcy_data.c \
+    third_party/boringssl/crypto/x509v3/pcy_lib.c \
+    third_party/boringssl/crypto/x509v3/pcy_map.c \
+    third_party/boringssl/crypto/x509v3/pcy_node.c \
+    third_party/boringssl/crypto/x509v3/pcy_tree.c \
+    third_party/boringssl/crypto/x509v3/v3_akey.c \
+    third_party/boringssl/crypto/x509v3/v3_akeya.c \
+    third_party/boringssl/crypto/x509v3/v3_alt.c \
+    third_party/boringssl/crypto/x509v3/v3_bcons.c \
+    third_party/boringssl/crypto/x509v3/v3_bitst.c \
+    third_party/boringssl/crypto/x509v3/v3_conf.c \
+    third_party/boringssl/crypto/x509v3/v3_cpols.c \
+    third_party/boringssl/crypto/x509v3/v3_crld.c \
+    third_party/boringssl/crypto/x509v3/v3_enum.c \
+    third_party/boringssl/crypto/x509v3/v3_extku.c \
+    third_party/boringssl/crypto/x509v3/v3_genn.c \
+    third_party/boringssl/crypto/x509v3/v3_ia5.c \
+    third_party/boringssl/crypto/x509v3/v3_info.c \
+    third_party/boringssl/crypto/x509v3/v3_int.c \
+    third_party/boringssl/crypto/x509v3/v3_lib.c \
+    third_party/boringssl/crypto/x509v3/v3_ncons.c \
+    third_party/boringssl/crypto/x509v3/v3_pci.c \
+    third_party/boringssl/crypto/x509v3/v3_pcia.c \
+    third_party/boringssl/crypto/x509v3/v3_pcons.c \
+    third_party/boringssl/crypto/x509v3/v3_pku.c \
+    third_party/boringssl/crypto/x509v3/v3_pmaps.c \
+    third_party/boringssl/crypto/x509v3/v3_prn.c \
+    third_party/boringssl/crypto/x509v3/v3_purp.c \
+    third_party/boringssl/crypto/x509v3/v3_skey.c \
+    third_party/boringssl/crypto/x509v3/v3_sxnet.c \
+    third_party/boringssl/crypto/x509v3/v3_utl.c \
+    third_party/boringssl/ssl/custom_extensions.c \
+    third_party/boringssl/ssl/d1_both.c \
+    third_party/boringssl/ssl/d1_clnt.c \
+    third_party/boringssl/ssl/d1_lib.c \
+    third_party/boringssl/ssl/d1_meth.c \
+    third_party/boringssl/ssl/d1_pkt.c \
+    third_party/boringssl/ssl/d1_srtp.c \
+    third_party/boringssl/ssl/d1_srvr.c \
+    third_party/boringssl/ssl/dtls_record.c \
+    third_party/boringssl/ssl/pqueue/pqueue.c \
+    third_party/boringssl/ssl/s3_both.c \
+    third_party/boringssl/ssl/s3_clnt.c \
+    third_party/boringssl/ssl/s3_enc.c \
+    third_party/boringssl/ssl/s3_lib.c \
+    third_party/boringssl/ssl/s3_meth.c \
+    third_party/boringssl/ssl/s3_pkt.c \
+    third_party/boringssl/ssl/s3_srvr.c \
+    third_party/boringssl/ssl/ssl_aead_ctx.c \
+    third_party/boringssl/ssl/ssl_asn1.c \
+    third_party/boringssl/ssl/ssl_buffer.c \
+    third_party/boringssl/ssl/ssl_cert.c \
+    third_party/boringssl/ssl/ssl_cipher.c \
+    third_party/boringssl/ssl/ssl_file.c \
+    third_party/boringssl/ssl/ssl_lib.c \
+    third_party/boringssl/ssl/ssl_rsa.c \
+    third_party/boringssl/ssl/ssl_session.c \
+    third_party/boringssl/ssl/ssl_stat.c \
+    third_party/boringssl/ssl/t1_enc.c \
+    third_party/boringssl/ssl/t1_lib.c \
+    third_party/boringssl/ssl/tls_record.c \
+    third_party/zlib/adler32.c \
+    third_party/zlib/compress.c \
+    third_party/zlib/crc32.c \
+    third_party/zlib/deflate.c \
+    third_party/zlib/gzclose.c \
+    third_party/zlib/gzlib.c \
+    third_party/zlib/gzread.c \
+    third_party/zlib/gzwrite.c \
+    third_party/zlib/infback.c \
+    third_party/zlib/inffast.c \
+    third_party/zlib/inflate.c \
+    third_party/zlib/inftrees.c \
+    third_party/zlib/trees.c \
+    third_party/zlib/uncompr.c \
+    third_party/zlib/zutil.c \
+    , $ext_shared, , -Wall -Werror -std=c11 \
+    -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN \
+    -D_HAS_EXCEPTIONS=0 -DNOMINMAX)
+fi
diff --git a/doc/load-balancing.md b/doc/load-balancing.md
new file mode 100644
index 0000000000000000000000000000000000000000..681be02a72f04b5d8fbab2dc44095e299927b741
--- /dev/null
+++ b/doc/load-balancing.md
@@ -0,0 +1,97 @@
+Load Balancing in gRPC
+=======================
+
+# Objective
+
+To design a load balancing API between a gRPC client and a Load Balancer to
+instruct the client how to send load to multiple backend servers. 
+
+# Background
+
+Prior to any gRPC specifics, we explore some usual ways to approach load
+balancing.
+
+### Proxy Model
+
+Using a proxy provides a solid trustable client that can report load to the load
+balancing system. Proxies typically require more resources to operate since they
+have temporary copies of the RPC request and response. This model also increases
+latency to the RPCs.
+
+The proxy model was deemed inefficient when considering request heavy services
+like storage. 
+
+### Balancing-aware Client
+
+This thicker client places more of the load balancing logic in the client. For
+example, the client could contain many load balancing policies (Round Robin,
+Random, etc) used to select servers from a list. In this model, a list of
+servers would be either statically configured in the client, provided by the
+name resolution system, an external load balancer, etc. In any case, the client
+is responsible for choosing the preferred server from the list. 
+
+One of the drawbacks of this approach is writing and maintaining the load
+balancing policies in multiple languages and/or versions of the clients. These
+policies can be fairly complicated. Some of the algorithms also require client
+to server communication so the client would need to get thicker to support
+additional RPCs to get health or load information in addition to sending RPCs
+for user requests.
+
+It would also significantly complicate the client's code: the new design hides
+the load balancing complexity of multiple layers and presents it as a simple
+list of servers to the client.
+
+### External Load Balancing Service
+
+The client load balancing code is kept simple and portable, implementing
+well-known algorithms (ie, Round Robin) for server selection.
+Complex load balancing algorithms are instead provided by the load balancer. The
+client relies on the load balancer to provide _load balancing configuration_ and
+_the list of servers_ to which the client should send requests. The balancer
+updates the server list as needed to balance the load as well as handle server
+unavailability or health issues. The load balancer will make any necessary
+complex decisions and inform the client. The load balancer may communicate with
+the backend servers to collect load and health information.
+
+# Proposed Architecture
+
+The gRPC load balancing approach follows the third approach, by having an
+external load balancer which provides simple clients with a list of servers.
+
+## Client
+
+When establishing a gRPC stream to the balancer, the client will send an initial
+request to the load balancer (via a regular gRPC message). The load balancer
+will respond with client config (including, for example, settings for flow
+control, RPC deadlines, etc.) or a redirect to another load balancer. If the
+balancer did not redirect the client, it will then send a list of servers to the
+client. The client will contain simple load balancing logic for choosing the
+next server when it needs to send a request.
+
+## Load Balancer
+
+The Load Balancer is responsible for providing the client with a list of servers
+and client RPC parameters. The balancer chooses when to update the list of
+servers and can decide whether to provide a complete list, a subset, or a
+specific list of “picked” servers in a particular order. The balancer can
+optionally provide an expiration interval after which the server list should no
+longer be trusted and should be updated by the balancer.
+
+The load balancer may open reporting streams to each server contained in the
+server list. These streams are primarily used for load reporting. For example,
+Weighted Round Robin requires that the servers report utilization to the load
+balancer in order to compute the next list of servers.
+
+## Server
+
+The gRPC Server is responsible for answering RPC requests and providing
+responses to the client. The server will also report load to the load balancer
+if a reporting stream was opened for this purpose.
+
+### Security 
+
+The load balancer may be separate from the actual server backends and a
+compromise of the load balancer should only lead to a compromise of the
+loadbalancing functionality. In other words, a compromised load balancer should
+not be able to cause a client to trust a (potentially malicious) backend server
+any more than in a comparable situation without loadbalancing. 
diff --git a/gRPC.podspec b/gRPC.podspec
index 2c12403e5abc3ca752a1e6927402c58fe36b4c9b..d9c81ef88bd666aa1329960015cab4b562fcc815 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -158,20 +158,6 @@ Pod::Spec.new do |s|
                       'src/core/support/time_win32.c',
                       'src/core/support/tls_pthread.c',
                       'src/core/support/wrap_memcpy.c',
-                      'src/core/security/auth_filters.h',
-                      'src/core/security/base64.h',
-                      'src/core/security/credentials.h',
-                      'src/core/security/handshake.h',
-                      'src/core/security/json_token.h',
-                      'src/core/security/jwt_verifier.h',
-                      'src/core/security/secure_endpoint.h',
-                      'src/core/security/security_connector.h',
-                      'src/core/security/security_context.h',
-                      'src/core/tsi/fake_transport_security.h',
-                      'src/core/tsi/ssl_transport_security.h',
-                      'src/core/tsi/ssl_types.h',
-                      'src/core/tsi/transport_security.h',
-                      'src/core/tsi/transport_security_interface.h',
                       'src/core/census/grpc_filter.h',
                       'src/core/channel/channel_args.h',
                       'src/core/channel/channel_stack.h',
@@ -186,6 +172,7 @@ Pod::Spec.new do |s|
                       'src/core/client_config/client_config.h',
                       'src/core/client_config/connector.h',
                       'src/core/client_config/initial_connect_string.h',
+                      'src/core/client_config/lb_policies/load_balancer_api.h',
                       'src/core/client_config/lb_policies/pick_first.h',
                       'src/core/client_config/lb_policies/round_robin.h',
                       'src/core/client_config/lb_policy.h',
@@ -246,6 +233,7 @@ Pod::Spec.new do |s|
                       'src/core/json/json_common.h',
                       'src/core/json/json_reader.h',
                       'src/core/json/json_writer.h',
+                      'src/core/proto/grpc/lb/v0/load_balancer.pb.h',
                       'src/core/statistics/census_interface.h',
                       'src/core/statistics/census_rpc_stats.h',
                       'src/core/surface/api_trace.h',
@@ -285,9 +273,27 @@ Pod::Spec.new do |s|
                       'src/core/transport/static_metadata.h',
                       'src/core/transport/transport.h',
                       'src/core/transport/transport_impl.h',
+                      'src/core/security/auth_filters.h',
+                      'src/core/security/base64.h',
+                      'src/core/security/credentials.h',
+                      'src/core/security/handshake.h',
+                      'src/core/security/json_token.h',
+                      'src/core/security/jwt_verifier.h',
+                      'src/core/security/secure_endpoint.h',
+                      'src/core/security/security_connector.h',
+                      'src/core/security/security_context.h',
+                      'src/core/tsi/fake_transport_security.h',
+                      'src/core/tsi/ssl_transport_security.h',
+                      'src/core/tsi/ssl_types.h',
+                      'src/core/tsi/transport_security.h',
+                      'src/core/tsi/transport_security_interface.h',
                       'src/core/census/aggregation.h',
-                      'src/core/census/log.h',
+                      'src/core/census/mlog.h',
                       'src/core/census/rpc_metric_id.h',
+                      'third_party/nanopb/pb.h',
+                      'third_party/nanopb/pb_common.h',
+                      'third_party/nanopb/pb_decode.h',
+                      'third_party/nanopb/pb_encode.h',
                       'include/grpc/grpc_security.h',
                       'include/grpc/impl/codegen/byte_buffer.h',
                       'include/grpc/impl/codegen/compression_types.h',
@@ -301,27 +307,6 @@ Pod::Spec.new do |s|
                       'include/grpc/grpc.h',
                       'include/grpc/status.h',
                       'include/grpc/census.h',
-                      'src/core/httpcli/httpcli_security_connector.c',
-                      'src/core/security/base64.c',
-                      'src/core/security/client_auth_filter.c',
-                      'src/core/security/credentials.c',
-                      'src/core/security/credentials_metadata.c',
-                      'src/core/security/credentials_posix.c',
-                      'src/core/security/credentials_win32.c',
-                      'src/core/security/google_default_credentials.c',
-                      'src/core/security/handshake.c',
-                      'src/core/security/json_token.c',
-                      'src/core/security/jwt_verifier.c',
-                      'src/core/security/secure_endpoint.c',
-                      'src/core/security/security_connector.c',
-                      'src/core/security/security_context.c',
-                      'src/core/security/server_auth_filter.c',
-                      'src/core/security/server_secure_chttp2.c',
-                      'src/core/surface/init_secure.c',
-                      'src/core/surface/secure_channel_create.c',
-                      'src/core/tsi/fake_transport_security.c',
-                      'src/core/tsi/ssl_transport_security.c',
-                      'src/core/tsi/transport_security.c',
                       'src/core/census/grpc_context.c',
                       'src/core/census/grpc_filter.c',
                       'src/core/channel/channel_args.c',
@@ -337,6 +322,7 @@ Pod::Spec.new do |s|
                       'src/core/client_config/connector.c',
                       'src/core/client_config/default_initial_connect_string.c',
                       'src/core/client_config/initial_connect_string.c',
+                      'src/core/client_config/lb_policies/load_balancer_api.c',
                       'src/core/client_config/lb_policies/pick_first.c',
                       'src/core/client_config/lb_policies/round_robin.c',
                       'src/core/client_config/lb_policy.c',
@@ -401,6 +387,7 @@ Pod::Spec.new do |s|
                       'src/core/json/json_reader.c',
                       'src/core/json/json_string.c',
                       'src/core/json/json_writer.c',
+                      'src/core/proto/grpc/lb/v0/load_balancer.pb.c',
                       'src/core/surface/alarm.c',
                       'src/core/surface/api_trace.c',
                       'src/core/surface/byte_buffer.c',
@@ -450,12 +437,36 @@ Pod::Spec.new do |s|
                       'src/core/transport/static_metadata.c',
                       'src/core/transport/transport.c',
                       'src/core/transport/transport_op_string.c',
+                      'src/core/httpcli/httpcli_security_connector.c',
+                      'src/core/security/base64.c',
+                      'src/core/security/client_auth_filter.c',
+                      'src/core/security/credentials.c',
+                      'src/core/security/credentials_metadata.c',
+                      'src/core/security/credentials_posix.c',
+                      'src/core/security/credentials_win32.c',
+                      'src/core/security/google_default_credentials.c',
+                      'src/core/security/handshake.c',
+                      'src/core/security/json_token.c',
+                      'src/core/security/jwt_verifier.c',
+                      'src/core/security/secure_endpoint.c',
+                      'src/core/security/security_connector.c',
+                      'src/core/security/security_context.c',
+                      'src/core/security/server_auth_filter.c',
+                      'src/core/security/server_secure_chttp2.c',
+                      'src/core/surface/init_secure.c',
+                      'src/core/surface/secure_channel_create.c',
+                      'src/core/tsi/fake_transport_security.c',
+                      'src/core/tsi/ssl_transport_security.c',
+                      'src/core/tsi/transport_security.c',
                       'src/core/census/context.c',
                       'src/core/census/initialize.c',
-                      'src/core/census/log.c',
+                      'src/core/census/mlog.c',
                       'src/core/census/operation.c',
                       'src/core/census/placeholders.c',
-                      'src/core/census/tracing.c'
+                      'src/core/census/tracing.c',
+                      'third_party/nanopb/pb_common.c',
+                      'third_party/nanopb/pb_decode.c',
+                      'third_party/nanopb/pb_encode.c'
 
     ss.private_header_files = 'src/core/profiling/timers.h',
                               'src/core/support/block_annotate.h',
@@ -467,20 +478,6 @@ Pod::Spec.new do |s|
                               'src/core/support/string_win32.h',
                               'src/core/support/thd_internal.h',
                               'src/core/support/time_precise.h',
-                              'src/core/security/auth_filters.h',
-                              'src/core/security/base64.h',
-                              'src/core/security/credentials.h',
-                              'src/core/security/handshake.h',
-                              'src/core/security/json_token.h',
-                              'src/core/security/jwt_verifier.h',
-                              'src/core/security/secure_endpoint.h',
-                              'src/core/security/security_connector.h',
-                              'src/core/security/security_context.h',
-                              'src/core/tsi/fake_transport_security.h',
-                              'src/core/tsi/ssl_transport_security.h',
-                              'src/core/tsi/ssl_types.h',
-                              'src/core/tsi/transport_security.h',
-                              'src/core/tsi/transport_security_interface.h',
                               'src/core/census/grpc_filter.h',
                               'src/core/channel/channel_args.h',
                               'src/core/channel/channel_stack.h',
@@ -495,6 +492,7 @@ Pod::Spec.new do |s|
                               'src/core/client_config/client_config.h',
                               'src/core/client_config/connector.h',
                               'src/core/client_config/initial_connect_string.h',
+                              'src/core/client_config/lb_policies/load_balancer_api.h',
                               'src/core/client_config/lb_policies/pick_first.h',
                               'src/core/client_config/lb_policies/round_robin.h',
                               'src/core/client_config/lb_policy.h',
@@ -555,6 +553,7 @@ Pod::Spec.new do |s|
                               'src/core/json/json_common.h',
                               'src/core/json/json_reader.h',
                               'src/core/json/json_writer.h',
+                              'src/core/proto/grpc/lb/v0/load_balancer.pb.h',
                               'src/core/statistics/census_interface.h',
                               'src/core/statistics/census_rpc_stats.h',
                               'src/core/surface/api_trace.h',
@@ -594,9 +593,27 @@ Pod::Spec.new do |s|
                               'src/core/transport/static_metadata.h',
                               'src/core/transport/transport.h',
                               'src/core/transport/transport_impl.h',
+                              'src/core/security/auth_filters.h',
+                              'src/core/security/base64.h',
+                              'src/core/security/credentials.h',
+                              'src/core/security/handshake.h',
+                              'src/core/security/json_token.h',
+                              'src/core/security/jwt_verifier.h',
+                              'src/core/security/secure_endpoint.h',
+                              'src/core/security/security_connector.h',
+                              'src/core/security/security_context.h',
+                              'src/core/tsi/fake_transport_security.h',
+                              'src/core/tsi/ssl_transport_security.h',
+                              'src/core/tsi/ssl_types.h',
+                              'src/core/tsi/transport_security.h',
+                              'src/core/tsi/transport_security_interface.h',
                               'src/core/census/aggregation.h',
-                              'src/core/census/log.h',
-                              'src/core/census/rpc_metric_id.h'
+                              'src/core/census/mlog.h',
+                              'src/core/census/rpc_metric_id.h',
+                              'third_party/nanopb/pb.h',
+                              'third_party/nanopb/pb_common.h',
+                              'third_party/nanopb/pb_decode.h',
+                              'third_party/nanopb/pb_encode.h'
 
     ss.header_mappings_dir = '.'
     # This isn't officially supported in Cocoapods. We've asked for an alternative:
diff --git a/grpc.gemspec b/grpc.gemspec
index 1c20932641a717a622cf60d9becedccc00132891..6a0cd6a93436c8a1f118579c011ce74430d4349c 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -154,20 +154,6 @@ Gem::Specification.new do |s|
   s.files += %w( include/grpc/grpc.h )
   s.files += %w( include/grpc/status.h )
   s.files += %w( include/grpc/census.h )
-  s.files += %w( src/core/security/auth_filters.h )
-  s.files += %w( src/core/security/base64.h )
-  s.files += %w( src/core/security/credentials.h )
-  s.files += %w( src/core/security/handshake.h )
-  s.files += %w( src/core/security/json_token.h )
-  s.files += %w( src/core/security/jwt_verifier.h )
-  s.files += %w( src/core/security/secure_endpoint.h )
-  s.files += %w( src/core/security/security_connector.h )
-  s.files += %w( src/core/security/security_context.h )
-  s.files += %w( src/core/tsi/fake_transport_security.h )
-  s.files += %w( src/core/tsi/ssl_transport_security.h )
-  s.files += %w( src/core/tsi/ssl_types.h )
-  s.files += %w( src/core/tsi/transport_security.h )
-  s.files += %w( src/core/tsi/transport_security_interface.h )
   s.files += %w( src/core/census/grpc_filter.h )
   s.files += %w( src/core/channel/channel_args.h )
   s.files += %w( src/core/channel/channel_stack.h )
@@ -182,6 +168,7 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/client_config/client_config.h )
   s.files += %w( src/core/client_config/connector.h )
   s.files += %w( src/core/client_config/initial_connect_string.h )
+  s.files += %w( src/core/client_config/lb_policies/load_balancer_api.h )
   s.files += %w( src/core/client_config/lb_policies/pick_first.h )
   s.files += %w( src/core/client_config/lb_policies/round_robin.h )
   s.files += %w( src/core/client_config/lb_policy.h )
@@ -242,6 +229,7 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/json/json_common.h )
   s.files += %w( src/core/json/json_reader.h )
   s.files += %w( src/core/json/json_writer.h )
+  s.files += %w( src/core/proto/grpc/lb/v0/load_balancer.pb.h )
   s.files += %w( src/core/statistics/census_interface.h )
   s.files += %w( src/core/statistics/census_rpc_stats.h )
   s.files += %w( src/core/surface/api_trace.h )
@@ -281,30 +269,27 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/transport/static_metadata.h )
   s.files += %w( src/core/transport/transport.h )
   s.files += %w( src/core/transport/transport_impl.h )
+  s.files += %w( src/core/security/auth_filters.h )
+  s.files += %w( src/core/security/base64.h )
+  s.files += %w( src/core/security/credentials.h )
+  s.files += %w( src/core/security/handshake.h )
+  s.files += %w( src/core/security/json_token.h )
+  s.files += %w( src/core/security/jwt_verifier.h )
+  s.files += %w( src/core/security/secure_endpoint.h )
+  s.files += %w( src/core/security/security_connector.h )
+  s.files += %w( src/core/security/security_context.h )
+  s.files += %w( src/core/tsi/fake_transport_security.h )
+  s.files += %w( src/core/tsi/ssl_transport_security.h )
+  s.files += %w( src/core/tsi/ssl_types.h )
+  s.files += %w( src/core/tsi/transport_security.h )
+  s.files += %w( src/core/tsi/transport_security_interface.h )
   s.files += %w( src/core/census/aggregation.h )
-  s.files += %w( src/core/census/log.h )
+  s.files += %w( src/core/census/mlog.h )
   s.files += %w( src/core/census/rpc_metric_id.h )
-  s.files += %w( src/core/httpcli/httpcli_security_connector.c )
-  s.files += %w( src/core/security/base64.c )
-  s.files += %w( src/core/security/client_auth_filter.c )
-  s.files += %w( src/core/security/credentials.c )
-  s.files += %w( src/core/security/credentials_metadata.c )
-  s.files += %w( src/core/security/credentials_posix.c )
-  s.files += %w( src/core/security/credentials_win32.c )
-  s.files += %w( src/core/security/google_default_credentials.c )
-  s.files += %w( src/core/security/handshake.c )
-  s.files += %w( src/core/security/json_token.c )
-  s.files += %w( src/core/security/jwt_verifier.c )
-  s.files += %w( src/core/security/secure_endpoint.c )
-  s.files += %w( src/core/security/security_connector.c )
-  s.files += %w( src/core/security/security_context.c )
-  s.files += %w( src/core/security/server_auth_filter.c )
-  s.files += %w( src/core/security/server_secure_chttp2.c )
-  s.files += %w( src/core/surface/init_secure.c )
-  s.files += %w( src/core/surface/secure_channel_create.c )
-  s.files += %w( src/core/tsi/fake_transport_security.c )
-  s.files += %w( src/core/tsi/ssl_transport_security.c )
-  s.files += %w( src/core/tsi/transport_security.c )
+  s.files += %w( third_party/nanopb/pb.h )
+  s.files += %w( third_party/nanopb/pb_common.h )
+  s.files += %w( third_party/nanopb/pb_decode.h )
+  s.files += %w( third_party/nanopb/pb_encode.h )
   s.files += %w( src/core/census/grpc_context.c )
   s.files += %w( src/core/census/grpc_filter.c )
   s.files += %w( src/core/channel/channel_args.c )
@@ -320,6 +305,7 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/client_config/connector.c )
   s.files += %w( src/core/client_config/default_initial_connect_string.c )
   s.files += %w( src/core/client_config/initial_connect_string.c )
+  s.files += %w( src/core/client_config/lb_policies/load_balancer_api.c )
   s.files += %w( src/core/client_config/lb_policies/pick_first.c )
   s.files += %w( src/core/client_config/lb_policies/round_robin.c )
   s.files += %w( src/core/client_config/lb_policy.c )
@@ -384,6 +370,7 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/json/json_reader.c )
   s.files += %w( src/core/json/json_string.c )
   s.files += %w( src/core/json/json_writer.c )
+  s.files += %w( src/core/proto/grpc/lb/v0/load_balancer.pb.c )
   s.files += %w( src/core/surface/alarm.c )
   s.files += %w( src/core/surface/api_trace.c )
   s.files += %w( src/core/surface/byte_buffer.c )
@@ -433,12 +420,36 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/transport/static_metadata.c )
   s.files += %w( src/core/transport/transport.c )
   s.files += %w( src/core/transport/transport_op_string.c )
+  s.files += %w( src/core/httpcli/httpcli_security_connector.c )
+  s.files += %w( src/core/security/base64.c )
+  s.files += %w( src/core/security/client_auth_filter.c )
+  s.files += %w( src/core/security/credentials.c )
+  s.files += %w( src/core/security/credentials_metadata.c )
+  s.files += %w( src/core/security/credentials_posix.c )
+  s.files += %w( src/core/security/credentials_win32.c )
+  s.files += %w( src/core/security/google_default_credentials.c )
+  s.files += %w( src/core/security/handshake.c )
+  s.files += %w( src/core/security/json_token.c )
+  s.files += %w( src/core/security/jwt_verifier.c )
+  s.files += %w( src/core/security/secure_endpoint.c )
+  s.files += %w( src/core/security/security_connector.c )
+  s.files += %w( src/core/security/security_context.c )
+  s.files += %w( src/core/security/server_auth_filter.c )
+  s.files += %w( src/core/security/server_secure_chttp2.c )
+  s.files += %w( src/core/surface/init_secure.c )
+  s.files += %w( src/core/surface/secure_channel_create.c )
+  s.files += %w( src/core/tsi/fake_transport_security.c )
+  s.files += %w( src/core/tsi/ssl_transport_security.c )
+  s.files += %w( src/core/tsi/transport_security.c )
   s.files += %w( src/core/census/context.c )
   s.files += %w( src/core/census/initialize.c )
-  s.files += %w( src/core/census/log.c )
+  s.files += %w( src/core/census/mlog.c )
   s.files += %w( src/core/census/operation.c )
   s.files += %w( src/core/census/placeholders.c )
   s.files += %w( src/core/census/tracing.c )
+  s.files += %w( third_party/nanopb/pb_common.c )
+  s.files += %w( third_party/nanopb/pb_decode.c )
+  s.files += %w( third_party/nanopb/pb_encode.c )
   s.files += %w( third_party/boringssl/crypto/aes/internal.h )
   s.files += %w( third_party/boringssl/crypto/asn1/asn1_locl.h )
   s.files += %w( third_party/boringssl/crypto/bio/internal.h )
diff --git a/include/grpc++/impl/codegen/call.h b/include/grpc++/impl/codegen/call.h
index e65349ddd3a2d94ede564683edd4cbb0a86d3924..5e450b0d248a3253f16ab7ebadf30c890d496717 100644
--- a/include/grpc++/impl/codegen/call.h
+++ b/include/grpc++/impl/codegen/call.h
@@ -272,6 +272,7 @@ namespace CallOpGenericRecvMessageHelper {
 class DeserializeFunc {
  public:
   virtual Status Deserialize(grpc_byte_buffer* buf, int max_message_size) = 0;
+  virtual ~DeserializeFunc() {}
 };
 
 template <class R>
@@ -283,6 +284,8 @@ class DeserializeFuncType GRPC_FINAL : public DeserializeFunc {
     return SerializationTraits<R>::Deserialize(buf, message_, max_message_size);
   }
 
+  ~DeserializeFuncType() override {}
+
  private:
   R* message_;  // Not a managed pointer because management is external to this
 };
diff --git a/include/grpc++/server.h b/include/grpc++/server.h
index 2a71073a7e2f89852e6bc9342417420c702b6228..c177805236b62f50c50cdd31f56494ee5e682132 100644
--- a/include/grpc++/server.h
+++ b/include/grpc++/server.h
@@ -79,6 +79,8 @@ class Server GRPC_FINAL : public ServerInterface, private GrpcLibrary {
   class GlobalCallbacks {
    public:
     virtual ~GlobalCallbacks() {}
+    /// Called before server is created.
+    virtual void UpdateArguments(ChannelArguments* args) {}
     /// Called before application callback for each synchronous server request
     virtual void PreSynchronousRequest(ServerContext* context) = 0;
     /// Called after application callback for each synchronous server request
@@ -108,7 +110,7 @@ class Server GRPC_FINAL : public ServerInterface, private GrpcLibrary {
   /// \param max_message_size Maximum message length that the channel can
   /// receive.
   Server(ThreadPoolInterface* thread_pool, bool thread_pool_owned,
-         int max_message_size, const ChannelArguments& args);
+         int max_message_size, ChannelArguments* args);
 
   /// Register a service. This call does not take ownership of the service.
   /// The service must exist for the lifetime of the Server instance.
@@ -177,7 +179,7 @@ class Server GRPC_FINAL : public ServerInterface, private GrpcLibrary {
   bool has_generic_service_;
 
   // Pointer to the c grpc server.
-  grpc_server* const server_;
+  grpc_server* server_;
 
   ThreadPoolInterface* thread_pool_;
   // Whether the thread pool is created and owned by the server.
diff --git a/package.json b/package.json
index 76c0ffea468cbb57b54575b657e67f18b0944dde..bc58e3d337010662ef39881c54c189b2ec90a8bc 100644
--- a/package.json
+++ b/package.json
@@ -99,20 +99,6 @@
     "include/grpc/grpc.h",
     "include/grpc/status.h",
     "include/grpc/census.h",
-    "src/core/security/auth_filters.h",
-    "src/core/security/base64.h",
-    "src/core/security/credentials.h",
-    "src/core/security/handshake.h",
-    "src/core/security/json_token.h",
-    "src/core/security/jwt_verifier.h",
-    "src/core/security/secure_endpoint.h",
-    "src/core/security/security_connector.h",
-    "src/core/security/security_context.h",
-    "src/core/tsi/fake_transport_security.h",
-    "src/core/tsi/ssl_transport_security.h",
-    "src/core/tsi/ssl_types.h",
-    "src/core/tsi/transport_security.h",
-    "src/core/tsi/transport_security_interface.h",
     "src/core/census/grpc_filter.h",
     "src/core/channel/channel_args.h",
     "src/core/channel/channel_stack.h",
@@ -127,6 +113,7 @@
     "src/core/client_config/client_config.h",
     "src/core/client_config/connector.h",
     "src/core/client_config/initial_connect_string.h",
+    "src/core/client_config/lb_policies/load_balancer_api.h",
     "src/core/client_config/lb_policies/pick_first.h",
     "src/core/client_config/lb_policies/round_robin.h",
     "src/core/client_config/lb_policy.h",
@@ -187,6 +174,7 @@
     "src/core/json/json_common.h",
     "src/core/json/json_reader.h",
     "src/core/json/json_writer.h",
+    "src/core/proto/grpc/lb/v0/load_balancer.pb.h",
     "src/core/statistics/census_interface.h",
     "src/core/statistics/census_rpc_stats.h",
     "src/core/surface/api_trace.h",
@@ -226,30 +214,27 @@
     "src/core/transport/static_metadata.h",
     "src/core/transport/transport.h",
     "src/core/transport/transport_impl.h",
+    "src/core/security/auth_filters.h",
+    "src/core/security/base64.h",
+    "src/core/security/credentials.h",
+    "src/core/security/handshake.h",
+    "src/core/security/json_token.h",
+    "src/core/security/jwt_verifier.h",
+    "src/core/security/secure_endpoint.h",
+    "src/core/security/security_connector.h",
+    "src/core/security/security_context.h",
+    "src/core/tsi/fake_transport_security.h",
+    "src/core/tsi/ssl_transport_security.h",
+    "src/core/tsi/ssl_types.h",
+    "src/core/tsi/transport_security.h",
+    "src/core/tsi/transport_security_interface.h",
     "src/core/census/aggregation.h",
-    "src/core/census/log.h",
+    "src/core/census/mlog.h",
     "src/core/census/rpc_metric_id.h",
-    "src/core/httpcli/httpcli_security_connector.c",
-    "src/core/security/base64.c",
-    "src/core/security/client_auth_filter.c",
-    "src/core/security/credentials.c",
-    "src/core/security/credentials_metadata.c",
-    "src/core/security/credentials_posix.c",
-    "src/core/security/credentials_win32.c",
-    "src/core/security/google_default_credentials.c",
-    "src/core/security/handshake.c",
-    "src/core/security/json_token.c",
-    "src/core/security/jwt_verifier.c",
-    "src/core/security/secure_endpoint.c",
-    "src/core/security/security_connector.c",
-    "src/core/security/security_context.c",
-    "src/core/security/server_auth_filter.c",
-    "src/core/security/server_secure_chttp2.c",
-    "src/core/surface/init_secure.c",
-    "src/core/surface/secure_channel_create.c",
-    "src/core/tsi/fake_transport_security.c",
-    "src/core/tsi/ssl_transport_security.c",
-    "src/core/tsi/transport_security.c",
+    "third_party/nanopb/pb.h",
+    "third_party/nanopb/pb_common.h",
+    "third_party/nanopb/pb_decode.h",
+    "third_party/nanopb/pb_encode.h",
     "src/core/census/grpc_context.c",
     "src/core/census/grpc_filter.c",
     "src/core/channel/channel_args.c",
@@ -265,6 +250,7 @@
     "src/core/client_config/connector.c",
     "src/core/client_config/default_initial_connect_string.c",
     "src/core/client_config/initial_connect_string.c",
+    "src/core/client_config/lb_policies/load_balancer_api.c",
     "src/core/client_config/lb_policies/pick_first.c",
     "src/core/client_config/lb_policies/round_robin.c",
     "src/core/client_config/lb_policy.c",
@@ -329,6 +315,7 @@
     "src/core/json/json_reader.c",
     "src/core/json/json_string.c",
     "src/core/json/json_writer.c",
+    "src/core/proto/grpc/lb/v0/load_balancer.pb.c",
     "src/core/surface/alarm.c",
     "src/core/surface/api_trace.c",
     "src/core/surface/byte_buffer.c",
@@ -378,12 +365,36 @@
     "src/core/transport/static_metadata.c",
     "src/core/transport/transport.c",
     "src/core/transport/transport_op_string.c",
+    "src/core/httpcli/httpcli_security_connector.c",
+    "src/core/security/base64.c",
+    "src/core/security/client_auth_filter.c",
+    "src/core/security/credentials.c",
+    "src/core/security/credentials_metadata.c",
+    "src/core/security/credentials_posix.c",
+    "src/core/security/credentials_win32.c",
+    "src/core/security/google_default_credentials.c",
+    "src/core/security/handshake.c",
+    "src/core/security/json_token.c",
+    "src/core/security/jwt_verifier.c",
+    "src/core/security/secure_endpoint.c",
+    "src/core/security/security_connector.c",
+    "src/core/security/security_context.c",
+    "src/core/security/server_auth_filter.c",
+    "src/core/security/server_secure_chttp2.c",
+    "src/core/surface/init_secure.c",
+    "src/core/surface/secure_channel_create.c",
+    "src/core/tsi/fake_transport_security.c",
+    "src/core/tsi/ssl_transport_security.c",
+    "src/core/tsi/transport_security.c",
     "src/core/census/context.c",
     "src/core/census/initialize.c",
-    "src/core/census/log.c",
+    "src/core/census/mlog.c",
     "src/core/census/operation.c",
     "src/core/census/placeholders.c",
     "src/core/census/tracing.c",
+    "third_party/nanopb/pb_common.c",
+    "third_party/nanopb/pb_decode.c",
+    "third_party/nanopb/pb_encode.c",
     "third_party/zlib/crc32.h",
     "third_party/zlib/deflate.h",
     "third_party/zlib/gzguts.h",
diff --git a/package.xml b/package.xml
new file mode 100644
index 0000000000000000000000000000000000000000..99109ada8fd2eed100f4bdc8bb8b70175fec76bd
--- /dev/null
+++ b/package.xml
@@ -0,0 +1,998 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<package packagerversion="1.9.5" version="2.0" xmlns="http://pear.php.net/dtd/package-2.0" xmlns:tasks="http://pear.php.net/dtd/tasks-1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://pear.php.net/dtd/tasks-1.0 http://pear.php.net/dtd/tasks-1.0.xsd http://pear.php.net/dtd/package-2.0 http://pear.php.net/dtd/package-2.0.xsd">
+ <name>grpc</name>
+ <channel>pecl.php.net</channel>
+ <summary>A high performance, open source, general RPC framework that puts mobile and HTTP/2 first.</summary>
+ <description>Remote Procedure Calls (RPCs) provide a useful abstraction for building distributed applications and services. The libraries in this repository provide a concrete implementation of the gRPC protocol, layered over HTTP/2. These libraries enable communication between clients and servers using any combination of the supported languages.</description>
+ <lead>
+  <name>Stanley Cheung</name>
+  <user>stanleycheung</user>
+  <email>grpc-packages@google.com</email>
+  <active>yes</active>
+ </lead>
+ <date>2016-02-23</date>
+ <time>16:06:07</time>
+ <version>
+  <release>0.8.0</release>
+  <api>0.8.0</api>
+ </version>
+ <stability>
+  <release>beta</release>
+  <api>beta</api>
+ </stability>
+ <license>BSD</license>
+ <notes>
+- Simplify gRPC PHP installation #4517
+ </notes>
+ <contents>
+  <dir baseinstalldir="/" name="/">
+    <file baseinstalldir="/" name="config.m4" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/CREDITS" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/LICENSE" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/README.md" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/byte_buffer.c" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/call.c" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/call_credentials.c" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/channel.c" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/channel_credentials.c" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/completion_queue.c" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/php_grpc.c" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/server.c" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/server_credentials.c" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/timeval.c" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/byte_buffer.h" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/call.h" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/call_credentials.h" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/channel.h" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/channel_credentials.h" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/completion_queue.h" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/php_grpc.h" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/server.h" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/server_credentials.h" role="src" />
+    <file baseinstalldir="/" name="src/php/ext/grpc/timeval.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/alloc.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/atm.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/atm_gcc_atomic.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/atm_gcc_sync.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/atm_win32.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/avl.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/cmdline.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/cpu.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/histogram.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/host_port.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/log.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/log_win32.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/port_platform.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/slice.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/slice_buffer.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/string_util.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/subprocess.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/sync.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/sync_generic.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/sync_posix.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/sync_win32.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/thd.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/time.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/tls.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/tls_gcc.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/tls_msvc.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/tls_pthread.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/useful.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/alloc.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/atm.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/atm_gcc_atomic.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/atm_gcc_sync.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/atm_win32.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/log.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/port_platform.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/slice.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/slice_buffer.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/sync.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_generic.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_posix.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_win32.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/time.h" role="src" />
+    <file baseinstalldir="/" name="src/core/profiling/timers.h" role="src" />
+    <file baseinstalldir="/" name="src/core/support/block_annotate.h" role="src" />
+    <file baseinstalldir="/" name="src/core/support/env.h" role="src" />
+    <file baseinstalldir="/" name="src/core/support/file.h" role="src" />
+    <file baseinstalldir="/" name="src/core/support/murmur_hash.h" role="src" />
+    <file baseinstalldir="/" name="src/core/support/stack_lockfree.h" role="src" />
+    <file baseinstalldir="/" name="src/core/support/string.h" role="src" />
+    <file baseinstalldir="/" name="src/core/support/string_win32.h" role="src" />
+    <file baseinstalldir="/" name="src/core/support/thd_internal.h" role="src" />
+    <file baseinstalldir="/" name="src/core/support/time_precise.h" role="src" />
+    <file baseinstalldir="/" name="src/core/profiling/basic_timers.c" role="src" />
+    <file baseinstalldir="/" name="src/core/profiling/stap_timers.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/alloc.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/avl.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/cmdline.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/cpu_iphone.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/cpu_linux.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/cpu_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/cpu_windows.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/env_linux.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/env_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/env_win32.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/file.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/file_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/file_win32.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/histogram.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/host_port.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/log.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/log_android.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/log_linux.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/log_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/log_win32.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/murmur_hash.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/slice.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/slice_buffer.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/stack_lockfree.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/string.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/string_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/string_win32.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/subprocess_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/subprocess_windows.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/sync.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/sync_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/sync_win32.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/thd.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/thd_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/thd_win32.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/time.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/time_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/time_precise.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/time_win32.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/tls_pthread.c" role="src" />
+    <file baseinstalldir="/" name="src/core/support/wrap_memcpy.c" role="src" />
+    <file baseinstalldir="/" name="include/grpc/grpc_security.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/byte_buffer.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/compression_types.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/connectivity_state.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/grpc_types.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/propagation_bits.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/status.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/byte_buffer.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/byte_buffer_reader.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/compression.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/grpc.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/status.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/census.h" role="src" />
+    <file baseinstalldir="/" name="src/core/census/grpc_filter.h" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/channel_args.h" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/channel_stack.h" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/client_channel.h" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/client_uchannel.h" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/compress_filter.h" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/connected_channel.h" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/context.h" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/http_client_filter.h" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/http_server_filter.h" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/subchannel_call_holder.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/client_config.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/connector.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/initial_connect_string.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/lb_policies/load_balancer_api.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/lb_policies/pick_first.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/lb_policies/round_robin.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/lb_policy.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/lb_policy_factory.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/lb_policy_registry.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/resolver.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/resolver_factory.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/resolver_registry.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/resolvers/dns_resolver.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/resolvers/sockaddr_resolver.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/subchannel.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/subchannel_factory.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/subchannel_index.h" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/uri_parser.h" role="src" />
+    <file baseinstalldir="/" name="src/core/compression/algorithm_metadata.h" role="src" />
+    <file baseinstalldir="/" name="src/core/compression/message_compress.h" role="src" />
+    <file baseinstalldir="/" name="src/core/debug/trace.h" role="src" />
+    <file baseinstalldir="/" name="src/core/httpcli/format_request.h" role="src" />
+    <file baseinstalldir="/" name="src/core/httpcli/httpcli.h" role="src" />
+    <file baseinstalldir="/" name="src/core/httpcli/parser.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/closure.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/endpoint.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/endpoint_pair.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/exec_ctx.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/executor.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/fd_posix.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/iocp_windows.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/iomgr.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/iomgr_internal.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/iomgr_posix.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/pollset.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/pollset_posix.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/pollset_set.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/pollset_set_posix.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/pollset_set_windows.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/pollset_windows.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/resolve_address.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/sockaddr.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/sockaddr_posix.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/sockaddr_utils.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/sockaddr_win32.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/socket_utils_posix.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/socket_windows.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/tcp_client.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/tcp_posix.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/tcp_server.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/tcp_windows.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/time_averaged_stats.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/timer.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/timer_heap.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/udp_server.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/wakeup_fd_pipe.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/wakeup_fd_posix.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/workqueue.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/workqueue_posix.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/workqueue_windows.h" role="src" />
+    <file baseinstalldir="/" name="src/core/json/json.h" role="src" />
+    <file baseinstalldir="/" name="src/core/json/json_common.h" role="src" />
+    <file baseinstalldir="/" name="src/core/json/json_reader.h" role="src" />
+    <file baseinstalldir="/" name="src/core/json/json_writer.h" role="src" />
+    <file baseinstalldir="/" name="src/core/proto/grpc/lb/v0/load_balancer.pb.h" role="src" />
+    <file baseinstalldir="/" name="src/core/statistics/census_interface.h" role="src" />
+    <file baseinstalldir="/" name="src/core/statistics/census_rpc_stats.h" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/api_trace.h" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/call.h" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/call_test_only.h" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/channel.h" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/completion_queue.h" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/event_string.h" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/init.h" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/server.h" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/surface_trace.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/byte_stream.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/alpn.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/bin_encoder.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/frame.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/frame_data.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/frame_goaway.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/frame_ping.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/frame_rst_stream.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/frame_settings.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/frame_window_update.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/hpack_encoder.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/hpack_parser.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/hpack_table.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/http2_errors.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/huffsyms.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/incoming_metadata.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/internal.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/status_conversion.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/stream_map.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/timeout_encoding.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/varint.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2_transport.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/connectivity_state.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/metadata.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/metadata_batch.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/static_metadata.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/transport.h" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/transport_impl.h" role="src" />
+    <file baseinstalldir="/" name="src/core/security/auth_filters.h" role="src" />
+    <file baseinstalldir="/" name="src/core/security/base64.h" role="src" />
+    <file baseinstalldir="/" name="src/core/security/credentials.h" role="src" />
+    <file baseinstalldir="/" name="src/core/security/handshake.h" role="src" />
+    <file baseinstalldir="/" name="src/core/security/json_token.h" role="src" />
+    <file baseinstalldir="/" name="src/core/security/jwt_verifier.h" role="src" />
+    <file baseinstalldir="/" name="src/core/security/secure_endpoint.h" role="src" />
+    <file baseinstalldir="/" name="src/core/security/security_connector.h" role="src" />
+    <file baseinstalldir="/" name="src/core/security/security_context.h" role="src" />
+    <file baseinstalldir="/" name="src/core/tsi/fake_transport_security.h" role="src" />
+    <file baseinstalldir="/" name="src/core/tsi/ssl_transport_security.h" role="src" />
+    <file baseinstalldir="/" name="src/core/tsi/ssl_types.h" role="src" />
+    <file baseinstalldir="/" name="src/core/tsi/transport_security.h" role="src" />
+    <file baseinstalldir="/" name="src/core/tsi/transport_security_interface.h" role="src" />
+    <file baseinstalldir="/" name="src/core/census/aggregation.h" role="src" />
+    <file baseinstalldir="/" name="src/core/census/mlog.h" role="src" />
+    <file baseinstalldir="/" name="src/core/census/rpc_metric_id.h" role="src" />
+    <file baseinstalldir="/" name="third_party/nanopb/pb.h" role="src" />
+    <file baseinstalldir="/" name="third_party/nanopb/pb_common.h" role="src" />
+    <file baseinstalldir="/" name="third_party/nanopb/pb_decode.h" role="src" />
+    <file baseinstalldir="/" name="third_party/nanopb/pb_encode.h" role="src" />
+    <file baseinstalldir="/" name="src/core/census/grpc_context.c" role="src" />
+    <file baseinstalldir="/" name="src/core/census/grpc_filter.c" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/channel_args.c" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/channel_stack.c" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/client_channel.c" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/client_uchannel.c" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/compress_filter.c" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/connected_channel.c" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/http_client_filter.c" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/http_server_filter.c" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/subchannel_call_holder.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/client_config.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/connector.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/default_initial_connect_string.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/initial_connect_string.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/lb_policies/load_balancer_api.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/lb_policies/pick_first.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/lb_policies/round_robin.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/lb_policy.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/lb_policy_factory.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/lb_policy_registry.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/resolver.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/resolver_factory.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/resolver_registry.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/resolvers/dns_resolver.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/resolvers/sockaddr_resolver.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/subchannel.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/subchannel_factory.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/subchannel_index.c" role="src" />
+    <file baseinstalldir="/" name="src/core/client_config/uri_parser.c" role="src" />
+    <file baseinstalldir="/" name="src/core/compression/algorithm.c" role="src" />
+    <file baseinstalldir="/" name="src/core/compression/message_compress.c" role="src" />
+    <file baseinstalldir="/" name="src/core/debug/trace.c" role="src" />
+    <file baseinstalldir="/" name="src/core/httpcli/format_request.c" role="src" />
+    <file baseinstalldir="/" name="src/core/httpcli/httpcli.c" role="src" />
+    <file baseinstalldir="/" name="src/core/httpcli/parser.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/closure.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/endpoint.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/endpoint_pair_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/endpoint_pair_windows.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/exec_ctx.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/executor.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/fd_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/iocp_windows.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/iomgr.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/iomgr_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/iomgr_windows.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/pollset_multipoller_with_epoll.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/pollset_multipoller_with_poll_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/pollset_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/pollset_set_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/pollset_set_windows.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/pollset_windows.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/resolve_address_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/resolve_address_windows.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/sockaddr_utils.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/socket_utils_common_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/socket_utils_linux.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/socket_utils_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/socket_windows.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/tcp_client_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/tcp_client_windows.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/tcp_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/tcp_server_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/tcp_server_windows.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/tcp_windows.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/time_averaged_stats.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/timer.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/timer_heap.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/udp_server.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/wakeup_fd_eventfd.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/wakeup_fd_nospecial.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/wakeup_fd_pipe.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/wakeup_fd_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/workqueue_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/workqueue_windows.c" role="src" />
+    <file baseinstalldir="/" name="src/core/json/json.c" role="src" />
+    <file baseinstalldir="/" name="src/core/json/json_reader.c" role="src" />
+    <file baseinstalldir="/" name="src/core/json/json_string.c" role="src" />
+    <file baseinstalldir="/" name="src/core/json/json_writer.c" role="src" />
+    <file baseinstalldir="/" name="src/core/proto/grpc/lb/v0/load_balancer.pb.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/alarm.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/api_trace.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/byte_buffer.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/byte_buffer_reader.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/call.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/call_details.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/call_log_batch.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/channel.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/channel_connectivity.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/channel_create.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/channel_ping.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/completion_queue.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/event_string.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/init.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/lame_client.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/metadata_array.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/server.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/server_chttp2.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/server_create.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/validate_metadata.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/version.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/byte_stream.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/alpn.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/bin_encoder.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/frame_data.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/frame_goaway.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/frame_ping.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/frame_rst_stream.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/frame_settings.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/frame_window_update.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/hpack_encoder.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/hpack_parser.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/hpack_table.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/huffsyms.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/incoming_metadata.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/parsing.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/status_conversion.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/stream_lists.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/stream_map.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/timeout_encoding.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/varint.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2/writing.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/chttp2_transport.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/connectivity_state.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/metadata.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/metadata_batch.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/static_metadata.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/transport.c" role="src" />
+    <file baseinstalldir="/" name="src/core/transport/transport_op_string.c" role="src" />
+    <file baseinstalldir="/" name="src/core/httpcli/httpcli_security_connector.c" role="src" />
+    <file baseinstalldir="/" name="src/core/security/base64.c" role="src" />
+    <file baseinstalldir="/" name="src/core/security/client_auth_filter.c" role="src" />
+    <file baseinstalldir="/" name="src/core/security/credentials.c" role="src" />
+    <file baseinstalldir="/" name="src/core/security/credentials_metadata.c" role="src" />
+    <file baseinstalldir="/" name="src/core/security/credentials_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/security/credentials_win32.c" role="src" />
+    <file baseinstalldir="/" name="src/core/security/google_default_credentials.c" role="src" />
+    <file baseinstalldir="/" name="src/core/security/handshake.c" role="src" />
+    <file baseinstalldir="/" name="src/core/security/json_token.c" role="src" />
+    <file baseinstalldir="/" name="src/core/security/jwt_verifier.c" role="src" />
+    <file baseinstalldir="/" name="src/core/security/secure_endpoint.c" role="src" />
+    <file baseinstalldir="/" name="src/core/security/security_connector.c" role="src" />
+    <file baseinstalldir="/" name="src/core/security/security_context.c" role="src" />
+    <file baseinstalldir="/" name="src/core/security/server_auth_filter.c" role="src" />
+    <file baseinstalldir="/" name="src/core/security/server_secure_chttp2.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/init_secure.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/secure_channel_create.c" role="src" />
+    <file baseinstalldir="/" name="src/core/tsi/fake_transport_security.c" role="src" />
+    <file baseinstalldir="/" name="src/core/tsi/ssl_transport_security.c" role="src" />
+    <file baseinstalldir="/" name="src/core/tsi/transport_security.c" role="src" />
+    <file baseinstalldir="/" name="src/core/census/context.c" role="src" />
+    <file baseinstalldir="/" name="src/core/census/initialize.c" role="src" />
+    <file baseinstalldir="/" name="src/core/census/mlog.c" role="src" />
+    <file baseinstalldir="/" name="src/core/census/operation.c" role="src" />
+    <file baseinstalldir="/" name="src/core/census/placeholders.c" role="src" />
+    <file baseinstalldir="/" name="src/core/census/tracing.c" role="src" />
+    <file baseinstalldir="/" name="third_party/nanopb/pb_common.c" role="src" />
+    <file baseinstalldir="/" name="third_party/nanopb/pb_decode.c" role="src" />
+    <file baseinstalldir="/" name="third_party/nanopb/pb_encode.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/aes/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/asn1_locl.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bio/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/rsaz_exp.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bytestring/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/cipher/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/conf/conf_def.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/conf/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/des/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/dh/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/digest/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/digest/md32_common.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/directory.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/dsa/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ec/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ec/p256-x86_64-table.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/evp/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/modes/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/obj/obj_dat.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/obj/obj_xref.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/pkcs8/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/rand/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/rsa/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/test/scoped_types.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/test/test_util.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/charmap.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/vpm_int.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/ext_dat.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/pcy_int.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/aead.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/aes.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/arm_arch.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/asn1.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/asn1_mac.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/asn1t.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/base.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/base64.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/bio.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/blowfish.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/bn.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/buf.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/buffer.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/bytestring.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/cast.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/chacha.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/cipher.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/cmac.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/conf.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/cpu.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/crypto.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/curve25519.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/des.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/dh.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/digest.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/dsa.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/dtls1.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/ec.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/ec_key.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/ecdh.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/ecdsa.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/engine.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/err.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/evp.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/ex_data.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/hkdf.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/hmac.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/lhash.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/lhash_macros.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/md4.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/md5.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/mem.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/obj.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/obj_mac.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/objects.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/opensslfeatures.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/opensslv.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/ossl_typ.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/pem.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/pkcs12.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/pkcs7.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/pkcs8.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/poly1305.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/pqueue.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/rand.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/rc4.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/rsa.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/safestack.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/sha.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/srtp.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/ssl.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/ssl3.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/stack.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/stack_macros.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/thread.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/time_support.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/tls1.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/type_check.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/x509.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/x509_vfy.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/include/openssl/x509v3.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/internal.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/test/async_bio.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/test/packeted_bio.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/test/scoped_types.h" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/test/test_config.h" role="src" />
+    <file baseinstalldir="/" name="src/boringssl/err_data.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/aes/aes.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/aes/mode_wrappers.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_bitstr.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_bool.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_bytes.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_d2i_fp.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_dup.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_enum.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_gentm.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_i2d_fp.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_int.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_mbstr.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_object.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_octet.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_print.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_strnid.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_time.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_type.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_utctm.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/a_utf8.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/asn1_lib.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/asn1_par.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/asn_pack.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/bio_asn1.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/bio_ndef.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/f_enum.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/f_int.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/f_string.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/t_bitst.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/t_pkey.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/tasn_dec.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/tasn_enc.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/tasn_fre.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/tasn_new.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/tasn_prn.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/tasn_typ.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/tasn_utl.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/x_bignum.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/asn1/x_long.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/base64/base64.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bio/bio.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bio/bio_mem.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bio/buffer.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bio/connect.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bio/fd.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bio/file.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bio/hexdump.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bio/pair.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bio/printf.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bio/socket.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bio/socket_helper.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/add.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/asm/x86_64-gcc.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/bn.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/bn_asn1.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/cmp.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/convert.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/ctx.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/div.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/exponentiation.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/gcd.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/generic.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/kronecker.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/montgomery.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/mul.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/prime.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/random.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/rsaz_exp.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/shift.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bn/sqrt.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/buf/buf.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bytestring/ber.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bytestring/cbb.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/bytestring/cbs.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/chacha/chacha_generic.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/chacha/chacha_vec.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/cipher/aead.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/cipher/cipher.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/cipher/derive_key.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/cipher/e_aes.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/cipher/e_chacha20poly1305.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/cipher/e_des.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/cipher/e_null.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/cipher/e_rc2.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/cipher/e_rc4.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/cipher/e_ssl3.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/cipher/e_tls.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/cipher/tls_cbc.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/cmac/cmac.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/conf/conf.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/cpu-arm.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/cpu-intel.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/crypto.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/curve25519/curve25519.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/des/des.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/dh/check.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/dh/dh.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/dh/dh_asn1.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/dh/params.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/digest/digest.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/digest/digests.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/directory_posix.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/directory_win.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/dsa/dsa.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/dsa/dsa_asn1.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ec/ec.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ec/ec_asn1.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ec/ec_key.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ec/ec_montgomery.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ec/oct.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ec/p224-64.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ec/p256-64.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ec/p256-x86_64.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ec/simple.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ec/util-64.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ec/wnaf.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ecdh/ecdh.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ecdsa/ecdsa.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ecdsa/ecdsa_asn1.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/engine/engine.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/err/err.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/evp/algorithm.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/evp/digestsign.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/evp/evp.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/evp/evp_asn1.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/evp/evp_ctx.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/evp/p_dsa_asn1.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/evp/p_ec.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/evp/p_ec_asn1.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/evp/p_rsa.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/evp/p_rsa_asn1.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/evp/pbkdf.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/evp/sign.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/ex_data.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/hkdf/hkdf.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/hmac/hmac.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/lhash/lhash.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/md4/md4.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/md5/md5.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/mem.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/modes/cbc.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/modes/cfb.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/modes/ctr.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/modes/gcm.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/modes/ofb.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/obj/obj.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/obj/obj_xref.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/pem/pem_all.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/pem/pem_info.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/pem/pem_lib.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/pem/pem_oth.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/pem/pem_pk8.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/pem/pem_pkey.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/pem/pem_x509.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/pem/pem_xaux.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/pkcs8/p5_pbe.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/pkcs8/p5_pbev2.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/pkcs8/p8_pkey.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/pkcs8/pkcs8.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/poly1305/poly1305.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/poly1305/poly1305_arm.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/poly1305/poly1305_vec.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/rand/rand.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/rand/urandom.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/rand/windows.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/rc4/rc4.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/refcount_c11.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/refcount_lock.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/rsa/blinding.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/rsa/padding.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/rsa/rsa.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/rsa/rsa_asn1.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/rsa/rsa_impl.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/sha/sha1.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/sha/sha256.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/sha/sha512.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/stack/stack.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/thread.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/thread_none.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/thread_pthread.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/thread_win.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/time_support.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/a_digest.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/a_sign.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/a_strex.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/a_verify.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/asn1_gen.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/by_dir.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/by_file.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/i2d_pr.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/pkcs7.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/t_crl.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/t_req.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/t_x509.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/t_x509a.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509_att.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509_cmp.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509_d2.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509_def.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509_ext.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509_lu.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509_obj.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509_r2x.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509_req.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509_set.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509_trs.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509_txt.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509_v3.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509_vfy.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509_vpm.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509cset.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509name.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509rset.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509spki.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x509type.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x_algor.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x_all.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x_attrib.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x_crl.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x_exten.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x_info.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x_name.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x_pkey.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x_pubkey.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x_req.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x_sig.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x_spki.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x_val.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x_x509.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509/x_x509a.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/pcy_cache.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/pcy_data.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/pcy_lib.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/pcy_map.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/pcy_node.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/pcy_tree.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_akey.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_akeya.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_alt.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_bcons.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_bitst.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_conf.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_cpols.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_crld.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_enum.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_extku.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_genn.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_ia5.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_info.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_int.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_lib.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_ncons.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_pci.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_pcia.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_pcons.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_pku.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_pmaps.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_prn.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_purp.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_skey.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_sxnet.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/crypto/x509v3/v3_utl.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/custom_extensions.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/d1_both.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/d1_clnt.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/d1_lib.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/d1_meth.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/d1_pkt.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/d1_srtp.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/d1_srvr.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/dtls_record.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/pqueue/pqueue.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/s3_both.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/s3_clnt.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/s3_enc.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/s3_lib.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/s3_meth.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/s3_pkt.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/s3_srvr.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/ssl_aead_ctx.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/ssl_asn1.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/ssl_buffer.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/ssl_cert.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/ssl_cipher.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/ssl_file.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/ssl_lib.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/ssl_rsa.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/ssl_session.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/ssl_stat.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/t1_enc.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/t1_lib.c" role="src" />
+    <file baseinstalldir="/" name="third_party/boringssl/ssl/tls_record.c" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/crc32.h" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/deflate.h" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/gzguts.h" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/inffast.h" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/inffixed.h" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/inflate.h" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/inftrees.h" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/trees.h" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/zconf.h" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/zlib.h" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/zutil.h" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/adler32.c" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/compress.c" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/crc32.c" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/deflate.c" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/gzclose.c" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/gzlib.c" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/gzread.c" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/gzwrite.c" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/infback.c" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/inffast.c" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/inflate.c" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/inftrees.c" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/trees.c" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/uncompr.c" role="src" />
+    <file baseinstalldir="/" name="third_party/zlib/zutil.c" role="src" />
+  </dir>
+ </contents>
+ <dependencies>
+  <required>
+   <php>
+    <min>5.5.0</min>
+   </php>
+   <pearinstaller>
+    <min>1.4.0</min>
+   </pearinstaller>
+  </required>
+ </dependencies>
+ <providesextension>grpc</providesextension>
+ <extsrcrelease />
+ <changelog>
+  <release>
+   <version>
+    <release>0.5.0</release>
+    <api>0.5.0</api>
+   </version>
+   <stability>
+    <release>alpha</release>
+    <api>alpha</api>
+   </stability>
+   <date>2015-06-16</date>
+   <license>BSD</license>
+   <notes>
+First alpha release
+   </notes>
+  </release>
+  <release>
+   <version>
+    <release>0.5.1</release>
+    <api>0.5.1</api>
+   </version>
+   <stability>
+    <release>alpha</release>
+    <api>alpha</api>
+   </stability>
+   <date>2015-07-09</date>
+   <license>BSD</license>
+   <notes>
+Update to wrap gRPC C Core version 0.10.0
+   </notes>
+  </release>
+  <release>
+   <version>
+    <release>0.6.0</release>
+    <api>0.6.0</api>
+   </version>
+   <stability>
+    <release>beta</release>
+    <api>beta</api>
+   </stability>
+   <date>2015-09-24</date>
+   <license>BSD</license>
+   <notes>
+- support per message compression disable
+- expose per-call host override option
+- expose connectivity API
+- expose channel target and call peer
+- add user-agent
+- update to wrap gRPC C core library beta version 0.11.0
+   </notes>
+  </release>
+  <release>
+   <version>
+    <release>0.6.1</release>
+    <api>0.6.0</api>
+   </version>
+   <stability>
+    <release>beta</release>
+    <api>beta</api>
+   </stability>
+   <date>2015-10-21</date>
+   <license>BSD</license>
+   <notes>
+- fixed undefined constant fatal error when run with apache/nginx #2275
+   </notes>
+  </release>
+  <release>
+   <version>
+    <release>0.7.0</release>
+    <api>0.7.0</api>
+   </version>
+   <stability>
+    <release>beta</release>
+    <api>beta</api>
+   </stability>
+   <date>2016-01-13</date>
+   <license>BSD</license>
+   <notes>
+- Breaking change to Credentials class (removed) #3765
+- Replaced by ChannelCredentials and CallCredentials class #3765
+- New plugin based metadata auth API #4394
+- Explicit ChannelCredentials::createInsecure() call
+   </notes>
+  </release>
+  <release>
+   <version>
+    <release>0.8.0</release>
+    <api>0.8.0</api>
+   </version>
+   <stability>
+    <release>beta</release>
+    <api>beta</api>
+   </stability>
+   <date>2016-02-23</date>
+   <license>BSD</license>
+   <notes>
+- Simplify gRPC PHP installation #4517
+   </notes>
+  </release>
+ </changelog>
+</package>
diff --git a/src/core/census/log.c b/src/core/census/mlog.c
similarity index 99%
rename from src/core/census/log.c
rename to src/core/census/mlog.c
index 91b26941b83a38ac8ff3518717b471306d7abfc8..a2cc46d3f261c06df0446567807fdc6a7163eb51 100644
--- a/src/core/census/log.c
+++ b/src/core/census/mlog.c
@@ -88,7 +88,7 @@
 // include the name of the structure, which will be passed as the first
 // argument. E.g. cl_block_initialize() will initialize a cl_block.
 
-#include "src/core/census/log.h"
+#include "src/core/census/mlog.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/atm.h>
 #include <grpc/support/cpu.h>
diff --git a/src/core/census/log.h b/src/core/census/mlog.h
similarity index 96%
rename from src/core/census/log.h
rename to src/core/census/mlog.h
index 05daea066f597d8905fa2d60b8f2e3061ccbd904..aaba9e15356223b466b97f32de4af96fd17ec71f 100644
--- a/src/core/census/log.h
+++ b/src/core/census/mlog.h
@@ -31,8 +31,10 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CENSUS_LOG_H
-#define GRPC_INTERNAL_CORE_CENSUS_LOG_H
+/* A very fast in-memory log, optimized for multiple writers. */
+
+#ifndef GRPC_INTERNAL_CORE_CENSUS_MLOG_H
+#define GRPC_INTERNAL_CORE_CENSUS_MLOG_H
 
 #include <grpc/support/port_platform.h>
 #include <stddef.h>
diff --git a/src/core/client_config/lb_policies/load_balancer_api.c b/src/core/client_config/lb_policies/load_balancer_api.c
new file mode 100644
index 0000000000000000000000000000000000000000..a6b5785fe4ed088eeacb0d19154facdf809760ba
--- /dev/null
+++ b/src/core/client_config/lb_policies/load_balancer_api.c
@@ -0,0 +1,163 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/client_config/lb_policies/load_balancer_api.h"
+#include "third_party/nanopb/pb_decode.h"
+#include "third_party/nanopb/pb_encode.h"
+
+#include <grpc/support/alloc.h>
+
+typedef struct decode_serverlist_arg {
+  int first_pass;
+  int i;
+  size_t num_servers;
+  grpc_grpclb_server **servers;
+} decode_serverlist_arg;
+
+/* invoked once for every Server in ServerList */
+static bool decode_serverlist(pb_istream_t *stream, const pb_field_t *field,
+                              void **arg) {
+  decode_serverlist_arg *dec_arg = *arg;
+  if (dec_arg->first_pass != 0) { /* first pass */
+    grpc_grpclb_server server;
+    if (!pb_decode(stream, grpc_lb_v0_Server_fields, &server)) {
+      return false;
+    }
+    dec_arg->num_servers++;
+  } else { /* second pass */
+    grpc_grpclb_server *server = gpr_malloc(sizeof(grpc_grpclb_server));
+    GPR_ASSERT(dec_arg->num_servers > 0);
+    if (dec_arg->i == 0) { /* first iteration of second pass */
+      dec_arg->servers =
+          gpr_malloc(sizeof(grpc_grpclb_server *) * dec_arg->num_servers);
+    }
+    if (!pb_decode(stream, grpc_lb_v0_Server_fields, server)) {
+      return false;
+    }
+    dec_arg->servers[dec_arg->i++] = server;
+  }
+
+  return true;
+}
+
+grpc_grpclb_request *grpc_grpclb_request_create(const char *lb_service_name) {
+  grpc_grpclb_request *req = gpr_malloc(sizeof(grpc_grpclb_request));
+
+  req->has_client_stats = 0; /* TODO(dgq): add support for stats once defined */
+  req->has_initial_request = 1;
+  req->initial_request.has_name = 1;
+  strncpy(req->initial_request.name, lb_service_name,
+          GRPC_GRPCLB_SERVICE_NAME_MAX_LENGTH);
+  return req;
+}
+
+gpr_slice grpc_grpclb_request_encode(const grpc_grpclb_request *request) {
+  size_t encoded_length;
+  pb_ostream_t sizestream;
+  pb_ostream_t outputstream;
+  gpr_slice slice;
+  memset(&sizestream, 0, sizeof(pb_ostream_t));
+  pb_encode(&sizestream, grpc_lb_v0_LoadBalanceRequest_fields, request);
+  encoded_length = sizestream.bytes_written;
+
+  slice = gpr_slice_malloc(encoded_length);
+  outputstream =
+      pb_ostream_from_buffer(GPR_SLICE_START_PTR(slice), encoded_length);
+  GPR_ASSERT(pb_encode(&outputstream, grpc_lb_v0_LoadBalanceRequest_fields,
+                       request) != 0);
+  return slice;
+}
+
+void grpc_grpclb_request_destroy(grpc_grpclb_request *request) {
+  gpr_free(request);
+}
+
+grpc_grpclb_response *grpc_grpclb_response_parse(gpr_slice encoded_response) {
+  bool status;
+  pb_istream_t stream =
+      pb_istream_from_buffer(GPR_SLICE_START_PTR(encoded_response),
+                             GPR_SLICE_LENGTH(encoded_response));
+  grpc_grpclb_response *res = gpr_malloc(sizeof(grpc_grpclb_response));
+  memset(res, 0, sizeof(*res));
+  status = pb_decode(&stream, grpc_lb_v0_LoadBalanceResponse_fields, res);
+  GPR_ASSERT(status == true);
+  return res;
+}
+
+grpc_grpclb_serverlist *grpc_grpclb_response_parse_serverlist(
+    gpr_slice encoded_response) {
+  grpc_grpclb_serverlist *sl = gpr_malloc(sizeof(grpc_grpclb_serverlist));
+  bool status;
+  decode_serverlist_arg arg;
+  pb_istream_t stream =
+      pb_istream_from_buffer(GPR_SLICE_START_PTR(encoded_response),
+                             GPR_SLICE_LENGTH(encoded_response));
+  pb_istream_t stream_at_start = stream;
+  grpc_grpclb_response *res = gpr_malloc(sizeof(grpc_grpclb_response));
+  memset(res, 0, sizeof(*res));
+  memset(&arg, 0, sizeof(decode_serverlist_arg));
+
+  res->server_list.servers.funcs.decode = decode_serverlist;
+  res->server_list.servers.arg = &arg;
+  arg.first_pass = 1;
+  status = pb_decode(&stream, grpc_lb_v0_LoadBalanceResponse_fields, res);
+  GPR_ASSERT(status == true);
+  GPR_ASSERT(arg.num_servers > 0);
+
+  arg.first_pass = 0;
+  status =
+      pb_decode(&stream_at_start, grpc_lb_v0_LoadBalanceResponse_fields, res);
+  GPR_ASSERT(status == true);
+  GPR_ASSERT(arg.servers != NULL);
+
+  sl->num_servers = arg.num_servers;
+  sl->servers = arg.servers;
+  if (res->server_list.has_expiration_interval) {
+    sl->expiration_interval = res->server_list.expiration_interval;
+  }
+  grpc_grpclb_response_destroy(res);
+  return sl;
+}
+
+void grpc_grpclb_destroy_serverlist(grpc_grpclb_serverlist *serverlist) {
+  size_t i;
+  for (i = 0; i < serverlist->num_servers; i++) {
+    gpr_free(serverlist->servers[i]);
+  }
+  gpr_free(serverlist->servers);
+  gpr_free(serverlist);
+}
+
+void grpc_grpclb_response_destroy(grpc_grpclb_response *response) {
+  gpr_free(response);
+}
diff --git a/src/core/client_config/lb_policies/load_balancer_api.h b/src/core/client_config/lb_policies/load_balancer_api.h
new file mode 100644
index 0000000000000000000000000000000000000000..4dbe1d6c224ef595fe82cf3812c25f0293ae78c9
--- /dev/null
+++ b/src/core/client_config/lb_policies/load_balancer_api.h
@@ -0,0 +1,85 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_LB_POLICIES_LOAD_BALANCER_API_H
+#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_LB_POLICIES_LOAD_BALANCER_API_H
+
+#include <grpc/support/slice_buffer.h>
+
+#include "src/core/client_config/lb_policy_factory.h"
+#include "src/core/proto/grpc/lb/v0/load_balancer.pb.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define GRPC_GRPCLB_SERVICE_NAME_MAX_LENGTH 128
+
+typedef grpc_lb_v0_LoadBalanceRequest grpc_grpclb_request;
+typedef grpc_lb_v0_LoadBalanceResponse grpc_grpclb_response;
+typedef grpc_lb_v0_Server grpc_grpclb_server;
+typedef grpc_lb_v0_Duration grpc_grpclb_duration;
+typedef struct grpc_grpclb_serverlist {
+  grpc_grpclb_server **servers;
+  size_t num_servers;
+  grpc_grpclb_duration expiration_interval;
+} grpc_grpclb_serverlist;
+
+/** Create a request for a gRPC LB service under \a lb_service_name */
+grpc_grpclb_request *grpc_grpclb_request_create(const char *lb_service_name);
+
+/** Protocol Buffers v3-encode \a request */
+gpr_slice grpc_grpclb_request_encode(const grpc_grpclb_request *request);
+
+/** Destroy \a request */
+void grpc_grpclb_request_destroy(grpc_grpclb_request *request);
+
+/** Parse (ie, decode) the bytes in \a encoded_response as a \a
+ * grpc_grpclb_response */
+grpc_grpclb_response *grpc_grpclb_response_parse(gpr_slice encoded_response);
+
+/** Destroy \a serverlist */
+void grpc_grpclb_destroy_serverlist(grpc_grpclb_serverlist *serverlist);
+
+/** Parse the list of servers from an encoded \a grpc_grpclb_response */
+grpc_grpclb_serverlist *grpc_grpclb_response_parse_serverlist(
+    gpr_slice encoded_response);
+
+/** Destroy \a response */
+void grpc_grpclb_response_destroy(grpc_grpclb_response *response);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_INTERNAL_CORE_CLIENT_CONFIG_LB_POLICIES_LOAD_BALANCER_API_H */
diff --git a/src/core/iomgr/pollset_posix.h b/src/core/iomgr/pollset_posix.h
index 58158e3d46a4cce94a5dbb30af26be1e6b58f861..ed7eb5cb7dbdd6ef325d69f098115f11327c9ba2 100644
--- a/src/core/iomgr/pollset_posix.h
+++ b/src/core/iomgr/pollset_posix.h
@@ -142,6 +142,10 @@ int grpc_pollset_has_workers(grpc_pollset *pollset);
 void grpc_remove_fd_from_all_epoll_sets(int fd);
 
 /* override to allow tests to hook poll() usage */
+/* NOTE: Any changes to grpc_poll_function must take place when the gRPC
+   is certainly not doing any polling anywhere.
+   Otherwise, there might be a race between changing the variable and actually
+   doing a polling operation */
 typedef int (*grpc_poll_function_type)(struct pollfd *, nfds_t, int);
 extern grpc_poll_function_type grpc_poll_function;
 extern grpc_wakeup_fd grpc_global_wakeup_fd;
diff --git a/src/core/iomgr/pollset_windows.c b/src/core/iomgr/pollset_windows.c
index 8f35a465091e521db88db60627f50d5cbb0b280e..bbce23b46a76d6c1dc2bf21bc84a39b22d9da1e6 100644
--- a/src/core/iomgr/pollset_windows.c
+++ b/src/core/iomgr/pollset_windows.c
@@ -192,7 +192,7 @@ done:
     remove_worker(&worker, GRPC_POLLSET_WORKER_LINK_GLOBAL);
     remove_worker(&worker, GRPC_POLLSET_WORKER_LINK_POLLSET);
   }
-  gpr_cv_destroy(&worker->cv);
+  gpr_cv_destroy(&worker.cv);
   *worker_hdl = NULL;
 }
 
diff --git a/src/core/proto/grpc/lb/v0/load_balancer.pb.c b/src/core/proto/grpc/lb/v0/load_balancer.pb.c
new file mode 100644
index 0000000000000000000000000000000000000000..59aae30cff97c35d1b98b7bb7613199b53c725f7
--- /dev/null
+++ b/src/core/proto/grpc/lb/v0/load_balancer.pb.c
@@ -0,0 +1,119 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+/* Automatically generated nanopb constant definitions */
+/* Generated by nanopb-0.3.5-dev */
+
+#include "src/core/proto/grpc/lb/v0/load_balancer.pb.h"
+
+#if PB_PROTO_HEADER_VERSION != 30
+#error Regenerate this file with the current version of nanopb generator.
+#endif
+
+
+
+const pb_field_t grpc_lb_v0_Duration_fields[3] = {
+    PB_FIELD(  1, INT64   , OPTIONAL, STATIC  , FIRST, grpc_lb_v0_Duration, seconds, seconds, 0),
+    PB_FIELD(  2, INT32   , OPTIONAL, STATIC  , OTHER, grpc_lb_v0_Duration, nanos, seconds, 0),
+    PB_LAST_FIELD
+};
+
+const pb_field_t grpc_lb_v0_LoadBalanceRequest_fields[3] = {
+    PB_FIELD(  1, MESSAGE , OPTIONAL, STATIC  , FIRST, grpc_lb_v0_LoadBalanceRequest, initial_request, initial_request, &grpc_lb_v0_InitialLoadBalanceRequest_fields),
+    PB_FIELD(  2, MESSAGE , OPTIONAL, STATIC  , OTHER, grpc_lb_v0_LoadBalanceRequest, client_stats, initial_request, &grpc_lb_v0_ClientStats_fields),
+    PB_LAST_FIELD
+};
+
+const pb_field_t grpc_lb_v0_InitialLoadBalanceRequest_fields[2] = {
+    PB_FIELD(  1, STRING  , OPTIONAL, STATIC  , FIRST, grpc_lb_v0_InitialLoadBalanceRequest, name, name, 0),
+    PB_LAST_FIELD
+};
+
+const pb_field_t grpc_lb_v0_ClientStats_fields[4] = {
+    PB_FIELD(  1, INT64   , OPTIONAL, STATIC  , FIRST, grpc_lb_v0_ClientStats, total_requests, total_requests, 0),
+    PB_FIELD(  2, INT64   , OPTIONAL, STATIC  , OTHER, grpc_lb_v0_ClientStats, client_rpc_errors, total_requests, 0),
+    PB_FIELD(  3, INT64   , OPTIONAL, STATIC  , OTHER, grpc_lb_v0_ClientStats, dropped_requests, client_rpc_errors, 0),
+    PB_LAST_FIELD
+};
+
+const pb_field_t grpc_lb_v0_LoadBalanceResponse_fields[3] = {
+    PB_FIELD(  1, MESSAGE , OPTIONAL, STATIC  , FIRST, grpc_lb_v0_LoadBalanceResponse, initial_response, initial_response, &grpc_lb_v0_InitialLoadBalanceResponse_fields),
+    PB_FIELD(  2, MESSAGE , OPTIONAL, STATIC  , OTHER, grpc_lb_v0_LoadBalanceResponse, server_list, initial_response, &grpc_lb_v0_ServerList_fields),
+    PB_LAST_FIELD
+};
+
+const pb_field_t grpc_lb_v0_InitialLoadBalanceResponse_fields[4] = {
+    PB_FIELD(  1, STRING  , OPTIONAL, STATIC  , FIRST, grpc_lb_v0_InitialLoadBalanceResponse, client_config, client_config, 0),
+    PB_FIELD(  2, STRING  , OPTIONAL, STATIC  , OTHER, grpc_lb_v0_InitialLoadBalanceResponse, load_balancer_delegate, client_config, 0),
+    PB_FIELD(  3, MESSAGE , OPTIONAL, STATIC  , OTHER, grpc_lb_v0_InitialLoadBalanceResponse, client_stats_report_interval, load_balancer_delegate, &grpc_lb_v0_Duration_fields),
+    PB_LAST_FIELD
+};
+
+const pb_field_t grpc_lb_v0_ServerList_fields[3] = {
+    PB_FIELD(  1, MESSAGE , REPEATED, CALLBACK, FIRST, grpc_lb_v0_ServerList, servers, servers, &grpc_lb_v0_Server_fields),
+    PB_FIELD(  3, MESSAGE , OPTIONAL, STATIC  , OTHER, grpc_lb_v0_ServerList, expiration_interval, servers, &grpc_lb_v0_Duration_fields),
+    PB_LAST_FIELD
+};
+
+const pb_field_t grpc_lb_v0_Server_fields[5] = {
+    PB_FIELD(  1, STRING  , OPTIONAL, STATIC  , FIRST, grpc_lb_v0_Server, ip_address, ip_address, 0),
+    PB_FIELD(  2, INT32   , OPTIONAL, STATIC  , OTHER, grpc_lb_v0_Server, port, ip_address, 0),
+    PB_FIELD(  3, BYTES   , OPTIONAL, STATIC  , OTHER, grpc_lb_v0_Server, load_balance_token, port, 0),
+    PB_FIELD(  4, BOOL    , OPTIONAL, STATIC  , OTHER, grpc_lb_v0_Server, drop_request, load_balance_token, 0),
+    PB_LAST_FIELD
+};
+
+
+/* Check that field information fits in pb_field_t */
+#if !defined(PB_FIELD_32BIT)
+/* If you get an error here, it means that you need to define PB_FIELD_32BIT
+ * compile-time option. You can do that in pb.h or on compiler command line.
+ * 
+ * The reason you need to do this is that some of your messages contain tag
+ * numbers or field sizes that are larger than what can fit in 8 or 16 bit
+ * field descriptors.
+ */
+PB_STATIC_ASSERT((pb_membersize(grpc_lb_v0_LoadBalanceRequest, initial_request) < 65536 && pb_membersize(grpc_lb_v0_LoadBalanceRequest, client_stats) < 65536 && pb_membersize(grpc_lb_v0_LoadBalanceResponse, initial_response) < 65536 && pb_membersize(grpc_lb_v0_LoadBalanceResponse, server_list) < 65536 && pb_membersize(grpc_lb_v0_InitialLoadBalanceResponse, client_stats_report_interval) < 65536 && pb_membersize(grpc_lb_v0_ServerList, servers) < 65536 && pb_membersize(grpc_lb_v0_ServerList, expiration_interval) < 65536), YOU_MUST_DEFINE_PB_FIELD_32BIT_FOR_MESSAGES_grpc_lb_v0_Duration_grpc_lb_v0_LoadBalanceRequest_grpc_lb_v0_InitialLoadBalanceRequest_grpc_lb_v0_ClientStats_grpc_lb_v0_LoadBalanceResponse_grpc_lb_v0_InitialLoadBalanceResponse_grpc_lb_v0_ServerList_grpc_lb_v0_Server)
+#endif
+
+#if !defined(PB_FIELD_16BIT) && !defined(PB_FIELD_32BIT)
+/* If you get an error here, it means that you need to define PB_FIELD_16BIT
+ * compile-time option. You can do that in pb.h or on compiler command line.
+ * 
+ * The reason you need to do this is that some of your messages contain tag
+ * numbers or field sizes that are larger than what can fit in the default
+ * 8 bit descriptors.
+ */
+PB_STATIC_ASSERT((pb_membersize(grpc_lb_v0_LoadBalanceRequest, initial_request) < 256 && pb_membersize(grpc_lb_v0_LoadBalanceRequest, client_stats) < 256 && pb_membersize(grpc_lb_v0_LoadBalanceResponse, initial_response) < 256 && pb_membersize(grpc_lb_v0_LoadBalanceResponse, server_list) < 256 && pb_membersize(grpc_lb_v0_InitialLoadBalanceResponse, client_stats_report_interval) < 256 && pb_membersize(grpc_lb_v0_ServerList, servers) < 256 && pb_membersize(grpc_lb_v0_ServerList, expiration_interval) < 256), YOU_MUST_DEFINE_PB_FIELD_16BIT_FOR_MESSAGES_grpc_lb_v0_Duration_grpc_lb_v0_LoadBalanceRequest_grpc_lb_v0_InitialLoadBalanceRequest_grpc_lb_v0_ClientStats_grpc_lb_v0_LoadBalanceResponse_grpc_lb_v0_InitialLoadBalanceResponse_grpc_lb_v0_ServerList_grpc_lb_v0_Server)
+#endif
+
+
diff --git a/src/core/proto/grpc/lb/v0/load_balancer.pb.h b/src/core/proto/grpc/lb/v0/load_balancer.pb.h
new file mode 100644
index 0000000000000000000000000000000000000000..3599f881bb17e328389f01ce9493cd42f4184490
--- /dev/null
+++ b/src/core/proto/grpc/lb/v0/load_balancer.pb.h
@@ -0,0 +1,182 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+/* Automatically generated nanopb header */
+/* Generated by nanopb-0.3.5-dev */
+
+#ifndef PB_LOAD_BALANCER_PB_H_INCLUDED
+#define PB_LOAD_BALANCER_PB_H_INCLUDED
+#include "third_party/nanopb/pb.h"
+#if PB_PROTO_HEADER_VERSION != 30
+#error Regenerate this file with the current version of nanopb generator.
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Struct definitions */
+typedef struct _grpc_lb_v0_ClientStats {
+    bool has_total_requests;
+    int64_t total_requests;
+    bool has_client_rpc_errors;
+    int64_t client_rpc_errors;
+    bool has_dropped_requests;
+    int64_t dropped_requests;
+} grpc_lb_v0_ClientStats;
+
+typedef struct _grpc_lb_v0_Duration {
+    bool has_seconds;
+    int64_t seconds;
+    bool has_nanos;
+    int32_t nanos;
+} grpc_lb_v0_Duration;
+
+typedef struct _grpc_lb_v0_InitialLoadBalanceRequest {
+    bool has_name;
+    char name[128];
+} grpc_lb_v0_InitialLoadBalanceRequest;
+
+typedef PB_BYTES_ARRAY_T(64) grpc_lb_v0_Server_load_balance_token_t;
+typedef struct _grpc_lb_v0_Server {
+    bool has_ip_address;
+    char ip_address[46];
+    bool has_port;
+    int32_t port;
+    bool has_load_balance_token;
+    grpc_lb_v0_Server_load_balance_token_t load_balance_token;
+    bool has_drop_request;
+    bool drop_request;
+} grpc_lb_v0_Server;
+
+typedef struct _grpc_lb_v0_InitialLoadBalanceResponse {
+    bool has_client_config;
+    char client_config[64];
+    bool has_load_balancer_delegate;
+    char load_balancer_delegate[64];
+    bool has_client_stats_report_interval;
+    grpc_lb_v0_Duration client_stats_report_interval;
+} grpc_lb_v0_InitialLoadBalanceResponse;
+
+typedef struct _grpc_lb_v0_LoadBalanceRequest {
+    bool has_initial_request;
+    grpc_lb_v0_InitialLoadBalanceRequest initial_request;
+    bool has_client_stats;
+    grpc_lb_v0_ClientStats client_stats;
+} grpc_lb_v0_LoadBalanceRequest;
+
+typedef struct _grpc_lb_v0_ServerList {
+    pb_callback_t servers;
+    bool has_expiration_interval;
+    grpc_lb_v0_Duration expiration_interval;
+} grpc_lb_v0_ServerList;
+
+typedef struct _grpc_lb_v0_LoadBalanceResponse {
+    bool has_initial_response;
+    grpc_lb_v0_InitialLoadBalanceResponse initial_response;
+    bool has_server_list;
+    grpc_lb_v0_ServerList server_list;
+} grpc_lb_v0_LoadBalanceResponse;
+
+/* Default values for struct fields */
+
+/* Initializer values for message structs */
+#define grpc_lb_v0_Duration_init_default         {false, 0, false, 0}
+#define grpc_lb_v0_LoadBalanceRequest_init_default {false, grpc_lb_v0_InitialLoadBalanceRequest_init_default, false, grpc_lb_v0_ClientStats_init_default}
+#define grpc_lb_v0_InitialLoadBalanceRequest_init_default {false, ""}
+#define grpc_lb_v0_ClientStats_init_default      {false, 0, false, 0, false, 0}
+#define grpc_lb_v0_LoadBalanceResponse_init_default {false, grpc_lb_v0_InitialLoadBalanceResponse_init_default, false, grpc_lb_v0_ServerList_init_default}
+#define grpc_lb_v0_InitialLoadBalanceResponse_init_default {false, "", false, "", false, grpc_lb_v0_Duration_init_default}
+#define grpc_lb_v0_ServerList_init_default       {{{NULL}, NULL}, false, grpc_lb_v0_Duration_init_default}
+#define grpc_lb_v0_Server_init_default           {false, "", false, 0, false, {0, {0}}, false, 0}
+#define grpc_lb_v0_Duration_init_zero            {false, 0, false, 0}
+#define grpc_lb_v0_LoadBalanceRequest_init_zero  {false, grpc_lb_v0_InitialLoadBalanceRequest_init_zero, false, grpc_lb_v0_ClientStats_init_zero}
+#define grpc_lb_v0_InitialLoadBalanceRequest_init_zero {false, ""}
+#define grpc_lb_v0_ClientStats_init_zero         {false, 0, false, 0, false, 0}
+#define grpc_lb_v0_LoadBalanceResponse_init_zero {false, grpc_lb_v0_InitialLoadBalanceResponse_init_zero, false, grpc_lb_v0_ServerList_init_zero}
+#define grpc_lb_v0_InitialLoadBalanceResponse_init_zero {false, "", false, "", false, grpc_lb_v0_Duration_init_zero}
+#define grpc_lb_v0_ServerList_init_zero          {{{NULL}, NULL}, false, grpc_lb_v0_Duration_init_zero}
+#define grpc_lb_v0_Server_init_zero              {false, "", false, 0, false, {0, {0}}, false, 0}
+
+/* Field tags (for use in manual encoding/decoding) */
+#define grpc_lb_v0_ClientStats_total_requests_tag 1
+#define grpc_lb_v0_ClientStats_client_rpc_errors_tag 2
+#define grpc_lb_v0_ClientStats_dropped_requests_tag 3
+#define grpc_lb_v0_Duration_seconds_tag          1
+#define grpc_lb_v0_Duration_nanos_tag            2
+#define grpc_lb_v0_InitialLoadBalanceRequest_name_tag 1
+#define grpc_lb_v0_Server_ip_address_tag         1
+#define grpc_lb_v0_Server_port_tag               2
+#define grpc_lb_v0_Server_load_balance_token_tag 3
+#define grpc_lb_v0_Server_drop_request_tag       4
+#define grpc_lb_v0_InitialLoadBalanceResponse_client_config_tag 1
+#define grpc_lb_v0_InitialLoadBalanceResponse_load_balancer_delegate_tag 2
+#define grpc_lb_v0_InitialLoadBalanceResponse_client_stats_report_interval_tag 3
+#define grpc_lb_v0_LoadBalanceRequest_initial_request_tag 1
+#define grpc_lb_v0_LoadBalanceRequest_client_stats_tag 2
+#define grpc_lb_v0_ServerList_servers_tag        1
+#define grpc_lb_v0_ServerList_expiration_interval_tag 3
+#define grpc_lb_v0_LoadBalanceResponse_initial_response_tag 1
+#define grpc_lb_v0_LoadBalanceResponse_server_list_tag 2
+
+/* Struct field encoding specification for nanopb */
+extern const pb_field_t grpc_lb_v0_Duration_fields[3];
+extern const pb_field_t grpc_lb_v0_LoadBalanceRequest_fields[3];
+extern const pb_field_t grpc_lb_v0_InitialLoadBalanceRequest_fields[2];
+extern const pb_field_t grpc_lb_v0_ClientStats_fields[4];
+extern const pb_field_t grpc_lb_v0_LoadBalanceResponse_fields[3];
+extern const pb_field_t grpc_lb_v0_InitialLoadBalanceResponse_fields[4];
+extern const pb_field_t grpc_lb_v0_ServerList_fields[3];
+extern const pb_field_t grpc_lb_v0_Server_fields[5];
+
+/* Maximum encoded size of messages (where known) */
+#define grpc_lb_v0_Duration_size                 22
+#define grpc_lb_v0_LoadBalanceRequest_size       169
+#define grpc_lb_v0_InitialLoadBalanceRequest_size 131
+#define grpc_lb_v0_ClientStats_size              33
+#define grpc_lb_v0_LoadBalanceResponse_size      (165 + grpc_lb_v0_ServerList_size)
+#define grpc_lb_v0_InitialLoadBalanceResponse_size 156
+#define grpc_lb_v0_Server_size                   127
+
+/* Message IDs (where set with "msgid" option) */
+#ifdef PB_MSGID
+
+#define LOAD_BALANCER_MESSAGES \
+
+
+#endif
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif
diff --git a/src/core/surface/completion_queue.c b/src/core/surface/completion_queue.c
index d0659c7e5226206a43a18d3c31915ce5a1a82eed..41449fb4a6b3f8d9e66deb489fe8ae4e05ca277e 100644
--- a/src/core/surface/completion_queue.c
+++ b/src/core/surface/completion_queue.c
@@ -339,9 +339,10 @@ grpc_event grpc_completion_queue_next(grpc_completion_queue *cc,
       grpc_exec_ctx_flush(&exec_ctx);
       gpr_mu_lock(&cc->mu);
       continue;
+    } else {
+      grpc_pollset_work(&exec_ctx, POLLSET_FROM_CQ(cc), &worker, now,
+                        iteration_deadline);
     }
-    grpc_pollset_work(&exec_ctx, POLLSET_FROM_CQ(cc), &worker, now,
-                      iteration_deadline);
   }
   GRPC_SURFACE_TRACE_RETURNED_EVENT(cc, &ret);
   GRPC_CQ_INTERNAL_UNREF(cc, "next");
@@ -456,9 +457,10 @@ grpc_event grpc_completion_queue_pluck(grpc_completion_queue *cc, void *tag,
       grpc_exec_ctx_flush(&exec_ctx);
       gpr_mu_lock(&cc->mu);
       continue;
+    } else {
+      grpc_pollset_work(&exec_ctx, POLLSET_FROM_CQ(cc), &worker, now,
+                        iteration_deadline);
     }
-    grpc_pollset_work(&exec_ctx, POLLSET_FROM_CQ(cc), &worker, now,
-                      iteration_deadline);
     del_plucker(cc, tag, &worker);
   }
 done:
diff --git a/src/core/transport/chttp2/internal.h b/src/core/transport/chttp2/internal.h
index 0e1e2c42650f855f6d12b5b131cab3fc842d6221..d76d31be23f2f4f31c8aec172b580a8a8741d8fe 100644
--- a/src/core/transport/chttp2/internal.h
+++ b/src/core/transport/chttp2/internal.h
@@ -485,7 +485,8 @@ struct grpc_chttp2_stream {
 
 /** Someone is unlocking the transport mutex: check to see if writes
     are required, and schedule them if so */
-int grpc_chttp2_unlocking_check_writes(grpc_chttp2_transport_global *global,
+int grpc_chttp2_unlocking_check_writes(grpc_exec_ctx *exec_ctx,
+                                       grpc_chttp2_transport_global *global,
                                        grpc_chttp2_transport_writing *writing,
                                        int is_parsing);
 void grpc_chttp2_perform_writes(
@@ -568,8 +569,12 @@ void grpc_chttp2_list_add_writing_stalled_by_transport(
     grpc_chttp2_transport_writing *transport_writing,
     grpc_chttp2_stream_writing *stream_writing);
 void grpc_chttp2_list_flush_writing_stalled_by_transport(
-    grpc_chttp2_transport_writing *transport_writing, bool is_window_available);
+    grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_writing *transport_writing,
+    bool is_window_available);
 
+void grpc_chttp2_list_add_stalled_by_transport(
+    grpc_chttp2_transport_writing *transport_writing,
+    grpc_chttp2_stream_writing *stream_writing);
 int grpc_chttp2_list_pop_stalled_by_transport(
     grpc_chttp2_transport_global *transport_global,
     grpc_chttp2_stream_global **stream_global);
diff --git a/src/core/transport/chttp2/stream_lists.c b/src/core/transport/chttp2/stream_lists.c
index 2f31a47cb3df6a177edcc567f618426532757fc4..b284c7881838174ea878075cc4bc547a59e3cc94 100644
--- a/src/core/transport/chttp2/stream_lists.c
+++ b/src/core/transport/chttp2/stream_lists.c
@@ -316,13 +316,16 @@ int grpc_chttp2_list_pop_check_read_ops(
 void grpc_chttp2_list_add_writing_stalled_by_transport(
     grpc_chttp2_transport_writing *transport_writing,
     grpc_chttp2_stream_writing *stream_writing) {
-  stream_list_add(TRANSPORT_FROM_WRITING(transport_writing),
-                  STREAM_FROM_WRITING(stream_writing),
+  grpc_chttp2_stream *stream = STREAM_FROM_WRITING(stream_writing);
+  if (!stream->included[GRPC_CHTTP2_LIST_WRITING_STALLED_BY_TRANSPORT]) {
+    GRPC_CHTTP2_STREAM_REF(&stream->global, "chttp2_writing_stalled");
+  }
+  stream_list_add(TRANSPORT_FROM_WRITING(transport_writing), stream,
                   GRPC_CHTTP2_LIST_WRITING_STALLED_BY_TRANSPORT);
 }
 
 void grpc_chttp2_list_flush_writing_stalled_by_transport(
-    grpc_chttp2_transport_writing *transport_writing,
+    grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_writing *transport_writing,
     bool is_window_available) {
   grpc_chttp2_stream *stream;
   grpc_chttp2_transport *transport = TRANSPORT_FROM_WRITING(transport_writing);
@@ -331,11 +334,22 @@ void grpc_chttp2_list_flush_writing_stalled_by_transport(
     if (is_window_available) {
       grpc_chttp2_list_add_writable_stream(&transport->global, &stream->global);
     } else {
-      stream_list_add(transport, stream, GRPC_CHTTP2_LIST_STALLED_BY_TRANSPORT);
+      grpc_chttp2_list_add_stalled_by_transport(transport_writing,
+                                                &stream->writing);
     }
+    GRPC_CHTTP2_STREAM_UNREF(exec_ctx, &stream->global,
+                             "chttp2_writing_stalled");
   }
 }
 
+void grpc_chttp2_list_add_stalled_by_transport(
+    grpc_chttp2_transport_writing *transport_writing,
+    grpc_chttp2_stream_writing *stream_writing) {
+  stream_list_add(TRANSPORT_FROM_WRITING(transport_writing),
+                  STREAM_FROM_WRITING(stream_writing),
+                  GRPC_CHTTP2_LIST_STALLED_BY_TRANSPORT);
+}
+
 int grpc_chttp2_list_pop_stalled_by_transport(
     grpc_chttp2_transport_global *transport_global,
     grpc_chttp2_stream_global **stream_global) {
diff --git a/src/core/transport/chttp2/writing.c b/src/core/transport/chttp2/writing.c
index cafecf10465818fd93c63e0cccd1fb4604b3f289..356fd8174a76942b20e65409b63d049a0bcdacac 100644
--- a/src/core/transport/chttp2/writing.c
+++ b/src/core/transport/chttp2/writing.c
@@ -44,7 +44,7 @@ static void finalize_outbuf(grpc_exec_ctx *exec_ctx,
                             grpc_chttp2_transport_writing *transport_writing);
 
 int grpc_chttp2_unlocking_check_writes(
-    grpc_chttp2_transport_global *transport_global,
+    grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_global *transport_global,
     grpc_chttp2_transport_writing *transport_writing, int is_parsing) {
   grpc_chttp2_stream_global *stream_global;
   grpc_chttp2_stream_writing *stream_writing;
@@ -76,8 +76,8 @@ int grpc_chttp2_unlocking_check_writes(
   GRPC_CHTTP2_FLOW_MOVE_TRANSPORT("write", transport_writing, outgoing_window,
                                   transport_global, outgoing_window);
   bool is_window_available = transport_writing->outgoing_window > 0;
-  grpc_chttp2_list_flush_writing_stalled_by_transport(transport_writing,
-                                                      is_window_available);
+  grpc_chttp2_list_flush_writing_stalled_by_transport(
+      exec_ctx, transport_writing, is_window_available);
 
   /* for each grpc_chttp2_stream that's become writable, frame it's data
      (according to available window sizes) and add to the output buffer */
@@ -133,8 +133,8 @@ int grpc_chttp2_unlocking_check_writes(
             GRPC_CHTTP2_STREAM_REF(stream_global, "chttp2_writing");
           }
         } else {
-          grpc_chttp2_list_add_writing_stalled_by_transport(transport_writing,
-                                                            stream_writing);
+          grpc_chttp2_list_add_stalled_by_transport(transport_writing,
+                                                    stream_writing);
         }
       }
       if (stream_global->send_trailing_metadata) {
diff --git a/src/core/transport/chttp2_transport.c b/src/core/transport/chttp2_transport.c
index 617d98875c301e2eb5a381d9dc6cd3837b3a4d20..b9f511e9460fc1d1fc9c7c32d39a340ee58961f2 100644
--- a/src/core/transport/chttp2_transport.c
+++ b/src/core/transport/chttp2_transport.c
@@ -598,7 +598,7 @@ static void lock(grpc_chttp2_transport *t) { gpr_mu_lock(&t->mu); }
 static void unlock(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t) {
   GPR_TIMER_BEGIN("unlock", 0);
   if (!t->writing_active && !t->closed &&
-      grpc_chttp2_unlocking_check_writes(&t->global, &t->writing,
+      grpc_chttp2_unlocking_check_writes(exec_ctx, &t->global, &t->writing,
                                          t->parsing_active)) {
     t->writing_active = 1;
     REF_TRANSPORT(t, "writing");
@@ -1019,6 +1019,11 @@ static void check_read_ops(grpc_exec_ctx *exec_ctx,
       stream_global->recv_initial_metadata_ready = NULL;
     }
     if (stream_global->recv_message_ready != NULL) {
+      while (stream_global->seen_error &&
+             (bs = grpc_chttp2_incoming_frame_queue_pop(
+                  &stream_global->incoming_frames)) != NULL) {
+        grpc_byte_stream_destroy(exec_ctx, bs);
+      }
       if (stream_global->incoming_frames.head != NULL) {
         *stream_global->recv_message = grpc_chttp2_incoming_frame_queue_pop(
             &stream_global->incoming_frames);
diff --git a/src/cpp/server/server.cc b/src/cpp/server/server.cc
index 0d31140924bfcc8286a0b5c9467f06cc89af7801..6d31a608c803ded3b473e1a9ba8e9fa60e277bf1 100644
--- a/src/cpp/server/server.cc
+++ b/src/cpp/server/server.cc
@@ -272,27 +272,25 @@ class Server::SyncRequest GRPC_FINAL : public CompletionQueueTag {
   grpc_completion_queue* cq_;
 };
 
-static grpc_server* CreateServer(const ChannelArguments& args) {
-  grpc_channel_args channel_args;
-  args.SetChannelArgs(&channel_args);
-  return grpc_server_create(&channel_args, nullptr);
-}
-
 static internal::GrpcLibraryInitializer g_gli_initializer;
 Server::Server(ThreadPoolInterface* thread_pool, bool thread_pool_owned,
-               int max_message_size, const ChannelArguments& args)
+               int max_message_size, ChannelArguments* args)
     : max_message_size_(max_message_size),
       started_(false),
       shutdown_(false),
       num_running_cb_(0),
       sync_methods_(new std::list<SyncRequest>),
       has_generic_service_(false),
-      server_(CreateServer(args)),
+      server_(nullptr),
       thread_pool_(thread_pool),
       thread_pool_owned_(thread_pool_owned) {
   g_gli_initializer.summon();
   gpr_once_init(&g_once_init_callbacks, InitGlobalCallbacks);
   global_callbacks_ = g_callbacks;
+  global_callbacks_->UpdateArguments(args);
+  grpc_channel_args channel_args;
+  args->SetChannelArgs(&channel_args);
+  server_ = grpc_server_create(&channel_args, nullptr);
   grpc_server_register_completion_queue(server_, cq_.cq(), nullptr);
 }
 
diff --git a/src/cpp/server/server_builder.cc b/src/cpp/server/server_builder.cc
index c54cf6474f1af1116d6de72c305424d2559c948a..134e5f1d5ff2e4fd08029413a6e5c6a189583c76 100644
--- a/src/cpp/server/server_builder.cc
+++ b/src/cpp/server/server_builder.cc
@@ -103,7 +103,7 @@ std::unique_ptr<Server> ServerBuilder::BuildAndStart() {
   args.SetInt(GRPC_COMPRESSION_ALGORITHM_STATE_ARG,
               compression_options_.enabled_algorithms_bitset);
   std::unique_ptr<Server> server(
-      new Server(thread_pool.release(), true, max_message_size_, args));
+      new Server(thread_pool.release(), true, max_message_size_, &args));
   for (auto cq = cqs_.begin(); cq != cqs_.end(); ++cq) {
     grpc_server_register_completion_queue(server->server_, (*cq)->cq(),
                                           nullptr);
diff --git a/src/csharp/Grpc.Auth/GoogleAuthInterceptors.cs b/src/csharp/Grpc.Auth/GoogleAuthInterceptors.cs
index f77e9c6573d824857f501d41e49d995c40756216..1837f5c74bd03d79a174b68222be765ccc558471 100644
--- a/src/csharp/Grpc.Auth/GoogleAuthInterceptors.cs
+++ b/src/csharp/Grpc.Auth/GoogleAuthInterceptors.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -71,7 +71,7 @@ namespace Grpc.Auth
         /// <returns>The interceptor.</returns>
         public static AsyncAuthInterceptor FromAccessToken(string accessToken)
         {
-            Preconditions.CheckNotNull(accessToken);
+            GrpcPreconditions.CheckNotNull(accessToken);
             return new AsyncAuthInterceptor(async (context, metadata) =>
             {
                 metadata.Add(CreateBearerTokenHeader(accessToken));
diff --git a/src/csharp/Grpc.Core/AsyncAuthInterceptor.cs b/src/csharp/Grpc.Core/AsyncAuthInterceptor.cs
index 5c9ab048120b6d0b5346cb54de515620c87d7b32..5ba06d6509741551f5c25f18cbd7be06c98e28a3 100644
--- a/src/csharp/Grpc.Core/AsyncAuthInterceptor.cs
+++ b/src/csharp/Grpc.Core/AsyncAuthInterceptor.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -61,8 +61,8 @@ namespace Grpc.Core
         /// </summary>
         public AuthInterceptorContext(string serviceUrl, string methodName)
         {
-            this.serviceUrl = Preconditions.CheckNotNull(serviceUrl);
-            this.methodName = Preconditions.CheckNotNull(methodName);
+            this.serviceUrl = GrpcPreconditions.CheckNotNull(serviceUrl);
+            this.methodName = GrpcPreconditions.CheckNotNull(methodName);
         }
 
         /// <summary>
diff --git a/src/csharp/Grpc.Core/CallCredentials.cs b/src/csharp/Grpc.Core/CallCredentials.cs
index a71c8904fe76aeca8f8eae751f90a7b22b7eaafe..7cd41d04806a67e99037c6355c94fec42debf299 100644
--- a/src/csharp/Grpc.Core/CallCredentials.cs
+++ b/src/csharp/Grpc.Core/CallCredentials.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -87,7 +87,7 @@ namespace Grpc.Core
         /// <param name="interceptor">authentication interceptor</param>
         public MetadataCredentials(AsyncAuthInterceptor interceptor)
         {
-            this.interceptor = Preconditions.CheckNotNull(interceptor);
+            this.interceptor = GrpcPreconditions.CheckNotNull(interceptor);
         }
 
         internal override CallCredentialsSafeHandle ToNativeCredentials()
@@ -111,7 +111,7 @@ namespace Grpc.Core
         /// <param name="credentials">credentials to compose</param>
         public CompositeCallCredentials(params CallCredentials[] credentials)
         {
-            Preconditions.CheckArgument(credentials.Length >= 2, "Composite credentials object can only be created from 2 or more credentials.");
+            GrpcPreconditions.CheckArgument(credentials.Length >= 2, "Composite credentials object can only be created from 2 or more credentials.");
             this.credentials = new List<CallCredentials>(credentials);
         }
 
diff --git a/src/csharp/Grpc.Core/CallInvocationDetails.cs b/src/csharp/Grpc.Core/CallInvocationDetails.cs
index 8228b8f317f92ea8aa65485e7ed79a360d7cac5c..52bfbe6edbe1f765f111f7a41d5003df2fe28ea0 100644
--- a/src/csharp/Grpc.Core/CallInvocationDetails.cs
+++ b/src/csharp/Grpc.Core/CallInvocationDetails.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -85,11 +85,11 @@ namespace Grpc.Core
         /// <param name="options">Call options.</param>
         public CallInvocationDetails(Channel channel, string method, string host, Marshaller<TRequest> requestMarshaller, Marshaller<TResponse> responseMarshaller, CallOptions options)
         {
-            this.channel = Preconditions.CheckNotNull(channel, "channel");
-            this.method = Preconditions.CheckNotNull(method, "method");
+            this.channel = GrpcPreconditions.CheckNotNull(channel, "channel");
+            this.method = GrpcPreconditions.CheckNotNull(method, "method");
             this.host = host;
-            this.requestMarshaller = Preconditions.CheckNotNull(requestMarshaller, "requestMarshaller");
-            this.responseMarshaller = Preconditions.CheckNotNull(responseMarshaller, "responseMarshaller");
+            this.requestMarshaller = GrpcPreconditions.CheckNotNull(requestMarshaller, "requestMarshaller");
+            this.responseMarshaller = GrpcPreconditions.CheckNotNull(responseMarshaller, "responseMarshaller");
             this.options = options;
         }
 
diff --git a/src/csharp/Grpc.Core/CallOptions.cs b/src/csharp/Grpc.Core/CallOptions.cs
index 1fda80cb901b18f2af267695c2830cae947d6b5c..7bd95d4ba80e22ba9eab466ee6f0fb4bc4701aba 100644
--- a/src/csharp/Grpc.Core/CallOptions.cs
+++ b/src/csharp/Grpc.Core/CallOptions.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -176,13 +176,13 @@ namespace Grpc.Core
             {
                 if (propagationToken.Options.IsPropagateDeadline)
                 {
-                    Preconditions.CheckArgument(!newOptions.deadline.HasValue,
+                    GrpcPreconditions.CheckArgument(!newOptions.deadline.HasValue,
                         "Cannot propagate deadline from parent call. The deadline has already been set explicitly.");
                     newOptions.deadline = propagationToken.ParentDeadline;
                 }
                 if (propagationToken.Options.IsPropagateCancellation)
                 {
-                    Preconditions.CheckArgument(!newOptions.cancellationToken.CanBeCanceled,
+                    GrpcPreconditions.CheckArgument(!newOptions.cancellationToken.CanBeCanceled,
                         "Cannot propagate cancellation token from parent call. The cancellation token has already been set to a non-default value.");
                     newOptions.cancellationToken = propagationToken.ParentCancellationToken;
                 }
diff --git a/src/csharp/Grpc.Core/Channel.cs b/src/csharp/Grpc.Core/Channel.cs
index d8d43c7998d1b84c6cbfcbf394a85662991f5ef5..d7a482d86ffdc6edcd43e0a9d13c83eefa1fcd39 100644
--- a/src/csharp/Grpc.Core/Channel.cs
+++ b/src/csharp/Grpc.Core/Channel.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -68,7 +68,7 @@ namespace Grpc.Core
         /// <param name="options">Channel options.</param>
         public Channel(string target, ChannelCredentials credentials, IEnumerable<ChannelOption> options = null)
         {
-            this.target = Preconditions.CheckNotNull(target, "target");
+            this.target = GrpcPreconditions.CheckNotNull(target, "target");
             this.options = CreateOptionsDictionary(options);
             EnsureUserAgentChannelOption(this.options);
             this.environment = GrpcEnvironment.AddRef();
@@ -117,7 +117,7 @@ namespace Grpc.Core
         /// </summary>
         public Task WaitForStateChangedAsync(ChannelState lastObservedState, DateTime? deadline = null)
         {
-            Preconditions.CheckArgument(lastObservedState != ChannelState.FatalFailure,
+            GrpcPreconditions.CheckArgument(lastObservedState != ChannelState.FatalFailure,
                 "FatalFailure is a terminal state. No further state changes can occur.");
             var tcs = new TaskCompletionSource<object>();
             var deadlineTimespec = deadline.HasValue ? Timespec.FromDateTime(deadline.Value) : Timespec.InfFuture;
@@ -184,7 +184,7 @@ namespace Grpc.Core
         {
             lock (myLock)
             {
-                Preconditions.CheckState(!shutdownRequested);
+                GrpcPreconditions.CheckState(!shutdownRequested);
                 shutdownRequested = true;
             }
 
@@ -221,7 +221,7 @@ namespace Grpc.Core
 
             bool success = false;
             handle.DangerousAddRef(ref success);
-            Preconditions.CheckState(success);
+            GrpcPreconditions.CheckState(success);
         }
 
         internal void RemoveCallReference(object call)
diff --git a/src/csharp/Grpc.Core/ChannelCredentials.cs b/src/csharp/Grpc.Core/ChannelCredentials.cs
index 5d96958e7c082f1871f585a29af91883b7276022..03cda284008a93d163cfa396e5664052be26356c 100644
--- a/src/csharp/Grpc.Core/ChannelCredentials.cs
+++ b/src/csharp/Grpc.Core/ChannelCredentials.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -183,9 +183,9 @@ namespace Grpc.Core
         /// <param name="callCredentials">channelCredentials to compose</param>
         public CompositeChannelCredentials(ChannelCredentials channelCredentials, CallCredentials callCredentials)
         {
-            this.channelCredentials = Preconditions.CheckNotNull(channelCredentials);
-            this.callCredentials = Preconditions.CheckNotNull(callCredentials);
-            Preconditions.CheckArgument(channelCredentials.IsComposable, "Supplied channel credentials do not allow composition.");
+            this.channelCredentials = GrpcPreconditions.CheckNotNull(channelCredentials);
+            this.callCredentials = GrpcPreconditions.CheckNotNull(callCredentials);
+            GrpcPreconditions.CheckArgument(channelCredentials.IsComposable, "Supplied channel credentials do not allow composition.");
         }
 
         internal override ChannelCredentialsSafeHandle ToNativeCredentials()
diff --git a/src/csharp/Grpc.Core/ChannelOptions.cs b/src/csharp/Grpc.Core/ChannelOptions.cs
index d70673cf781f3dce1ab20c07af13488e8e2d9835..65e15e21e9974aef8d485839f187e3b9828c2c12 100644
--- a/src/csharp/Grpc.Core/ChannelOptions.cs
+++ b/src/csharp/Grpc.Core/ChannelOptions.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -73,8 +73,8 @@ namespace Grpc.Core
         public ChannelOption(string name, string stringValue)
         {
             this.type = OptionType.String;
-            this.name = Preconditions.CheckNotNull(name, "name");
-            this.stringValue = Preconditions.CheckNotNull(stringValue, "stringValue");
+            this.name = GrpcPreconditions.CheckNotNull(name, "name");
+            this.stringValue = GrpcPreconditions.CheckNotNull(stringValue, "stringValue");
         }
 
         /// <summary>
@@ -85,7 +85,7 @@ namespace Grpc.Core
         public ChannelOption(string name, int intValue)
         {
             this.type = OptionType.Integer;
-            this.name = Preconditions.CheckNotNull(name, "name");
+            this.name = GrpcPreconditions.CheckNotNull(name, "name");
             this.intValue = intValue;
         }
 
@@ -118,7 +118,7 @@ namespace Grpc.Core
         {
             get
             {
-                Preconditions.CheckState(type == OptionType.Integer);
+                GrpcPreconditions.CheckState(type == OptionType.Integer);
                 return intValue;
             }
         }
@@ -130,7 +130,7 @@ namespace Grpc.Core
         {
             get
             {
-                Preconditions.CheckState(type == OptionType.String);
+                GrpcPreconditions.CheckState(type == OptionType.String);
                 return stringValue;
             }
         }
diff --git a/src/csharp/Grpc.Core/ContextPropagationToken.cs b/src/csharp/Grpc.Core/ContextPropagationToken.cs
index 1d899b97fd55d7d78159f9e5d13148d4178efa2c..c0f638f837d18f67946769f59af829e5da698ab0 100644
--- a/src/csharp/Grpc.Core/ContextPropagationToken.cs
+++ b/src/csharp/Grpc.Core/ContextPropagationToken.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -68,7 +68,7 @@ namespace Grpc.Core
 
         internal ContextPropagationToken(CallSafeHandle parentCall, DateTime deadline, CancellationToken cancellationToken, ContextPropagationOptions options)
         {
-            this.parentCall = Preconditions.CheckNotNull(parentCall);
+            this.parentCall = GrpcPreconditions.CheckNotNull(parentCall);
             this.deadline = deadline;
             this.cancellationToken = cancellationToken;
             this.options = options ?? ContextPropagationOptions.Default;
diff --git a/src/csharp/Grpc.Core/Grpc.Core.csproj b/src/csharp/Grpc.Core/Grpc.Core.csproj
index 8d7d2cae0deff1dea392232fb4c1dc632473457e..3189835ccd913e7a533eab5dbecbe7aa65ce8136 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.csproj
+++ b/src/csharp/Grpc.Core/Grpc.Core.csproj
@@ -39,8 +39,7 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
-    <Reference Include="System.Interactive.Async, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
+    <Reference Include="System.Interactive.Async">
       <HintPath>..\packages\Ix-Async.1.2.5\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
   </ItemGroup>
@@ -91,7 +90,6 @@
     <Compile Include="Internal\AsyncCallBase.cs" />
     <Compile Include="Internal\AsyncCallServer.cs" />
     <Compile Include="Internal\AsyncCall.cs" />
-    <Compile Include="Utils\Preconditions.cs" />
     <Compile Include="Internal\ServerCredentialsSafeHandle.cs" />
     <Compile Include="ServerCredentials.cs" />
     <Compile Include="Metadata.cs" />
@@ -130,6 +128,7 @@
     <Compile Include="Profiling\IProfiler.cs" />
     <Compile Include="Profiling\Profilers.cs" />
     <Compile Include="Internal\DefaultSslRootsOverride.cs" />
+    <Compile Include="Utils\GrpcPreconditions.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="Grpc.Core.nuspec" />
diff --git a/src/csharp/Grpc.Core/GrpcEnvironment.cs b/src/csharp/Grpc.Core/GrpcEnvironment.cs
index f3aa3d79de629f6353d685d83d597ad371e69d32..86b37b8660196b5b6a7f6746e0ed661efdfd4069 100644
--- a/src/csharp/Grpc.Core/GrpcEnvironment.cs
+++ b/src/csharp/Grpc.Core/GrpcEnvironment.cs
@@ -83,7 +83,7 @@ namespace Grpc.Core
         {
             lock (staticLock)
             {
-                Preconditions.CheckState(refCount > 0);
+                GrpcPreconditions.CheckState(refCount > 0);
                 refCount--;
                 if (refCount == 0)
                 {
@@ -118,7 +118,7 @@ namespace Grpc.Core
         /// </summary>
         public static void SetLogger(ILogger customLogger)
         {
-            Preconditions.CheckNotNull(customLogger, "customLogger");
+            GrpcPreconditions.CheckNotNull(customLogger, "customLogger");
             logger = customLogger;
         }
 
diff --git a/src/csharp/Grpc.Core/Internal/AsyncCall.cs b/src/csharp/Grpc.Core/Internal/AsyncCall.cs
index 7dc4490281d046a1e125b7d03312dc5548f320be..2caba260b3a243d43bf9fe72ff627ed5a474acd7 100644
--- a/src/csharp/Grpc.Core/Internal/AsyncCall.cs
+++ b/src/csharp/Grpc.Core/Internal/AsyncCall.cs
@@ -99,7 +99,7 @@ namespace Grpc.Core.Internal
 
                 lock (myLock)
                 {
-                    Preconditions.CheckState(!started);
+                    GrpcPreconditions.CheckState(!started);
                     started = true;
                     Initialize(cq);
 
@@ -141,7 +141,7 @@ namespace Grpc.Core.Internal
         {
             lock (myLock)
             {
-                Preconditions.CheckState(!started);
+                GrpcPreconditions.CheckState(!started);
                 started = true;
 
                 Initialize(environment.CompletionQueue);
@@ -168,7 +168,7 @@ namespace Grpc.Core.Internal
         {
             lock (myLock)
             {
-                Preconditions.CheckState(!started);
+                GrpcPreconditions.CheckState(!started);
                 started = true;
 
                 Initialize(environment.CompletionQueue);
@@ -192,7 +192,7 @@ namespace Grpc.Core.Internal
         {
             lock (myLock)
             {
-                Preconditions.CheckState(!started);
+                GrpcPreconditions.CheckState(!started);
                 started = true;
 
                 Initialize(environment.CompletionQueue);
@@ -217,7 +217,7 @@ namespace Grpc.Core.Internal
         {
             lock (myLock)
             {
-                Preconditions.CheckState(!started);
+                GrpcPreconditions.CheckState(!started);
                 started = true;
 
                 Initialize(environment.CompletionQueue);
@@ -257,7 +257,7 @@ namespace Grpc.Core.Internal
         {
             lock (myLock)
             {
-                Preconditions.CheckNotNull(completionDelegate, "Completion delegate cannot be null");
+                GrpcPreconditions.CheckNotNull(completionDelegate, "Completion delegate cannot be null");
                 CheckSendingAllowed();
 
                 call.StartSendCloseFromClient(HandleHalfclosed);
@@ -297,7 +297,7 @@ namespace Grpc.Core.Internal
         {
             lock (myLock)
             {
-                Preconditions.CheckState(finishedStatus.HasValue, "Status can only be accessed once the call has finished.");
+                GrpcPreconditions.CheckState(finishedStatus.HasValue, "Status can only be accessed once the call has finished.");
                 return finishedStatus.Value.Status;
             }
         }
@@ -310,7 +310,7 @@ namespace Grpc.Core.Internal
         {
             lock (myLock)
             {
-                Preconditions.CheckState(finishedStatus.HasValue, "Trailers can only be accessed once the call has finished.");
+                GrpcPreconditions.CheckState(finishedStatus.HasValue, "Trailers can only be accessed once the call has finished.");
                 return finishedStatus.Value.Trailers;
             }
         }
diff --git a/src/csharp/Grpc.Core/Internal/AsyncCallBase.cs b/src/csharp/Grpc.Core/Internal/AsyncCallBase.cs
index 81a9a40fcc3825aad2a13e71cabdd1daba55d8db..45d4c3e078c4102996dbaae693a7c10c20457efd 100644
--- a/src/csharp/Grpc.Core/Internal/AsyncCallBase.cs
+++ b/src/csharp/Grpc.Core/Internal/AsyncCallBase.cs
@@ -79,9 +79,9 @@ namespace Grpc.Core.Internal
 
         public AsyncCallBase(Func<TWrite, byte[]> serializer, Func<byte[], TRead> deserializer, GrpcEnvironment environment)
         {
-            this.serializer = Preconditions.CheckNotNull(serializer);
-            this.deserializer = Preconditions.CheckNotNull(deserializer);
-            this.environment = Preconditions.CheckNotNull(environment);
+            this.serializer = GrpcPreconditions.CheckNotNull(serializer);
+            this.deserializer = GrpcPreconditions.CheckNotNull(deserializer);
+            this.environment = GrpcPreconditions.CheckNotNull(environment);
         }
 
         /// <summary>
@@ -91,7 +91,7 @@ namespace Grpc.Core.Internal
         {
             lock (myLock)
             {
-                Preconditions.CheckState(started);
+                GrpcPreconditions.CheckState(started);
                 cancelRequested = true;
 
                 if (!disposed)
@@ -135,7 +135,7 @@ namespace Grpc.Core.Internal
 
             lock (myLock)
             {
-                Preconditions.CheckNotNull(completionDelegate, "Completion delegate cannot be null");
+                GrpcPreconditions.CheckNotNull(completionDelegate, "Completion delegate cannot be null");
                 CheckSendingAllowed();
 
                 call.StartSendMessage(HandleSendFinished, payload, writeFlags, !initialMetadataSent);
@@ -154,7 +154,7 @@ namespace Grpc.Core.Internal
         {
             lock (myLock)
             {
-                Preconditions.CheckNotNull(completionDelegate, "Completion delegate cannot be null");
+                GrpcPreconditions.CheckNotNull(completionDelegate, "Completion delegate cannot be null");
                 CheckReadingAllowed();
 
                 call.StartReceiveMessage(HandleReadFinished);
@@ -204,22 +204,22 @@ namespace Grpc.Core.Internal
 
         protected void CheckSendingAllowed()
         {
-            Preconditions.CheckState(started);
+            GrpcPreconditions.CheckState(started);
             CheckNotCancelled();
-            Preconditions.CheckState(!disposed);
+            GrpcPreconditions.CheckState(!disposed);
 
-            Preconditions.CheckState(!halfcloseRequested, "Already halfclosed.");
-            Preconditions.CheckState(!finished, "Already finished.");
-            Preconditions.CheckState(sendCompletionDelegate == null, "Only one write can be pending at a time");
+            GrpcPreconditions.CheckState(!halfcloseRequested, "Already halfclosed.");
+            GrpcPreconditions.CheckState(!finished, "Already finished.");
+            GrpcPreconditions.CheckState(sendCompletionDelegate == null, "Only one write can be pending at a time");
         }
 
         protected virtual void CheckReadingAllowed()
         {
-            Preconditions.CheckState(started);
-            Preconditions.CheckState(!disposed);
+            GrpcPreconditions.CheckState(started);
+            GrpcPreconditions.CheckState(!disposed);
 
-            Preconditions.CheckState(!readingDone, "Stream has already been closed.");
-            Preconditions.CheckState(readCompletionDelegate == null, "Only one read can be pending at a time");
+            GrpcPreconditions.CheckState(!readingDone, "Stream has already been closed.");
+            GrpcPreconditions.CheckState(readCompletionDelegate == null, "Only one read can be pending at a time");
         }
 
         protected void CheckNotCancelled()
diff --git a/src/csharp/Grpc.Core/Internal/AsyncCallServer.cs b/src/csharp/Grpc.Core/Internal/AsyncCallServer.cs
index 6752d3fab330a7ed073698de8e2698c80a8b4150..b72cbd795f639f5737eb941a792dc01aab59a271 100644
--- a/src/csharp/Grpc.Core/Internal/AsyncCallServer.cs
+++ b/src/csharp/Grpc.Core/Internal/AsyncCallServer.cs
@@ -53,7 +53,7 @@ namespace Grpc.Core.Internal
 
         public AsyncCallServer(Func<TResponse, byte[]> serializer, Func<byte[], TRequest> deserializer, GrpcEnvironment environment, Server server) : base(serializer, deserializer, environment)
         {
-            this.server = Preconditions.CheckNotNull(server);
+            this.server = GrpcPreconditions.CheckNotNull(server);
         }
 
         public void Initialize(CallSafeHandle call)
@@ -71,7 +71,7 @@ namespace Grpc.Core.Internal
         {
             lock (myLock)
             {
-                Preconditions.CheckNotNull(call);
+                GrpcPreconditions.CheckNotNull(call);
 
                 started = true;
 
@@ -108,14 +108,14 @@ namespace Grpc.Core.Internal
         {
             lock (myLock)
             {
-                Preconditions.CheckNotNull(headers, "metadata");
-                Preconditions.CheckNotNull(completionDelegate, "Completion delegate cannot be null");
+                GrpcPreconditions.CheckNotNull(headers, "metadata");
+                GrpcPreconditions.CheckNotNull(completionDelegate, "Completion delegate cannot be null");
 
-                Preconditions.CheckState(!initialMetadataSent, "Response headers can only be sent once per call.");
-                Preconditions.CheckState(streamingWritesCounter == 0, "Response headers can only be sent before the first write starts.");
+                GrpcPreconditions.CheckState(!initialMetadataSent, "Response headers can only be sent once per call.");
+                GrpcPreconditions.CheckState(streamingWritesCounter == 0, "Response headers can only be sent before the first write starts.");
                 CheckSendingAllowed();
 
-                Preconditions.CheckNotNull(completionDelegate, "Completion delegate cannot be null");
+                GrpcPreconditions.CheckNotNull(completionDelegate, "Completion delegate cannot be null");
 
                 using (var metadataArray = MetadataArraySafeHandle.Create(headers))
                 {
@@ -136,7 +136,7 @@ namespace Grpc.Core.Internal
         {
             lock (myLock)
             {
-                Preconditions.CheckNotNull(completionDelegate, "Completion delegate cannot be null");
+                GrpcPreconditions.CheckNotNull(completionDelegate, "Completion delegate cannot be null");
                 CheckSendingAllowed();
 
                 using (var metadataArray = MetadataArraySafeHandle.Create(trailers))
@@ -177,7 +177,7 @@ namespace Grpc.Core.Internal
         protected override void CheckReadingAllowed()
         {
             base.CheckReadingAllowed();
-            Preconditions.CheckArgument(!cancelRequested);
+            GrpcPreconditions.CheckArgument(!cancelRequested);
         }
 
         protected override void OnAfterReleaseResources()
diff --git a/src/csharp/Grpc.Core/Internal/CompletionQueueSafeHandle.cs b/src/csharp/Grpc.Core/Internal/CompletionQueueSafeHandle.cs
index 9d7a990c427386b3a2128171bcc607ec15e193d1..5c75b52e2359fce92d4845bd8a53fd14a31f3b7c 100644
--- a/src/csharp/Grpc.Core/Internal/CompletionQueueSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/CompletionQueueSafeHandle.cs
@@ -101,7 +101,7 @@ namespace Grpc.Core.Internal
         {
             bool success = false;
             shutdownRefcount.IncrementIfNonzero(ref success);
-            Preconditions.CheckState(success, "Shutdown has already been called");
+            GrpcPreconditions.CheckState(success, "Shutdown has already been called");
         }
 
         private void EndOp()
diff --git a/src/csharp/Grpc.Core/Internal/CompletionRegistry.cs b/src/csharp/Grpc.Core/Internal/CompletionRegistry.cs
index 2796c959a389c52485b3db8fd566b9ee15ccb394..3a293e162621a9be95941a27d37b2033f1cababe 100644
--- a/src/csharp/Grpc.Core/Internal/CompletionRegistry.cs
+++ b/src/csharp/Grpc.Core/Internal/CompletionRegistry.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -59,7 +59,7 @@ namespace Grpc.Core.Internal
         public void Register(IntPtr key, OpCompletionDelegate callback)
         {
             environment.DebugStats.PendingBatchCompletions.Increment();
-            Preconditions.CheckState(dict.TryAdd(key, callback));
+            GrpcPreconditions.CheckState(dict.TryAdd(key, callback));
         }
 
         public void RegisterBatchCompletion(BatchContextSafeHandle ctx, BatchCompletionDelegate callback)
@@ -71,7 +71,7 @@ namespace Grpc.Core.Internal
         public OpCompletionDelegate Extract(IntPtr key)
         {
             OpCompletionDelegate value;
-            Preconditions.CheckState(dict.TryRemove(key, out value));
+            GrpcPreconditions.CheckState(dict.TryRemove(key, out value));
             environment.DebugStats.PendingBatchCompletions.Decrement();
             return value;
         }
diff --git a/src/csharp/Grpc.Core/Internal/Enums.cs b/src/csharp/Grpc.Core/Internal/Enums.cs
index b0eab2001bc5b1e70dc22d6b2b4de0b88a0e4945..098e7c0e99e570e9e2edd121a7ae20283b054a41 100644
--- a/src/csharp/Grpc.Core/Internal/Enums.cs
+++ b/src/csharp/Grpc.Core/Internal/Enums.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -72,7 +72,7 @@ namespace Grpc.Core.Internal
         /// </summary>
         public static void CheckOk(this GRPCCallError callError)
         {
-            Preconditions.CheckState(callError == GRPCCallError.OK, "Call error: " + callError);
+            GrpcPreconditions.CheckState(callError == GRPCCallError.OK, "Call error: " + callError);
         }
     }
 
diff --git a/src/csharp/Grpc.Core/Internal/NativeMetadataCredentialsPlugin.cs b/src/csharp/Grpc.Core/Internal/NativeMetadataCredentialsPlugin.cs
index 36b865c09cc2ec6f6076389166eac595e6065cb8..e810ffcdd03d565aedc853bda0757a8397cf9ff0 100644
--- a/src/csharp/Grpc.Core/Internal/NativeMetadataCredentialsPlugin.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeMetadataCredentialsPlugin.cs
@@ -53,7 +53,7 @@ namespace Grpc.Core.Internal
 
         public NativeMetadataCredentialsPlugin(AsyncAuthInterceptor interceptor)
         {
-            this.interceptor = Preconditions.CheckNotNull(interceptor, "interceptor");
+            this.interceptor = GrpcPreconditions.CheckNotNull(interceptor, "interceptor");
             this.nativeInterceptor = NativeMetadataInterceptorHandler;
 
             // Make sure the callback doesn't get garbage collected until it is destroyed.
diff --git a/src/csharp/Grpc.Core/Internal/ServerCallHandler.cs b/src/csharp/Grpc.Core/Internal/ServerCallHandler.cs
index de66759b94bdee24efa26d6209b663f401a5953c..ccf144de2def6e31819a88331f08c25998ad1459 100644
--- a/src/csharp/Grpc.Core/Internal/ServerCallHandler.cs
+++ b/src/csharp/Grpc.Core/Internal/ServerCallHandler.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -78,10 +78,10 @@ namespace Grpc.Core.Internal
             var context = HandlerUtils.NewContext(newRpc, asyncCall.Peer, responseStream, asyncCall.CancellationToken);
             try
             {
-                Preconditions.CheckArgument(await requestStream.MoveNext().ConfigureAwait(false));
+                GrpcPreconditions.CheckArgument(await requestStream.MoveNext().ConfigureAwait(false));
                 var request = requestStream.Current;
                 // TODO(jtattermusch): we need to read the full stream so that native callhandle gets deallocated.
-                Preconditions.CheckArgument(!await requestStream.MoveNext().ConfigureAwait(false));
+                GrpcPreconditions.CheckArgument(!await requestStream.MoveNext().ConfigureAwait(false));
                 var result = await handler(request, context).ConfigureAwait(false);
                 status = context.Status;
                 await responseStream.WriteAsync(result).ConfigureAwait(false);
@@ -134,10 +134,10 @@ namespace Grpc.Core.Internal
             var context = HandlerUtils.NewContext(newRpc, asyncCall.Peer, responseStream, asyncCall.CancellationToken);
             try
             {
-                Preconditions.CheckArgument(await requestStream.MoveNext().ConfigureAwait(false));
+                GrpcPreconditions.CheckArgument(await requestStream.MoveNext().ConfigureAwait(false));
                 var request = requestStream.Current;
                 // TODO(jtattermusch): we need to read the full stream so that native callhandle gets deallocated.
-                Preconditions.CheckArgument(!await requestStream.MoveNext().ConfigureAwait(false));
+                GrpcPreconditions.CheckArgument(!await requestStream.MoveNext().ConfigureAwait(false));
                 await handler(request, responseStream, context).ConfigureAwait(false);
                 status = context.Status;
             }
diff --git a/src/csharp/Grpc.Core/Internal/ServerCredentialsSafeHandle.cs b/src/csharp/Grpc.Core/Internal/ServerCredentialsSafeHandle.cs
index a1d080c7f1c7041368d2355a0a69edfceda8cd71..a50f35799028ec9b901d64166f7a810799967ddd 100644
--- a/src/csharp/Grpc.Core/Internal/ServerCredentialsSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/ServerCredentialsSafeHandle.cs
@@ -49,7 +49,7 @@ namespace Grpc.Core.Internal
 
         public static ServerCredentialsSafeHandle CreateSslCredentials(string pemRootCerts, string[] keyCertPairCertChainArray, string[] keyCertPairPrivateKeyArray, bool forceClientAuth)
         {
-            Preconditions.CheckArgument(keyCertPairCertChainArray.Length == keyCertPairPrivateKeyArray.Length);
+            GrpcPreconditions.CheckArgument(keyCertPairCertChainArray.Length == keyCertPairPrivateKeyArray.Length);
             return Native.grpcsharp_ssl_server_credentials_create(pemRootCerts,
                                                                   keyCertPairCertChainArray, keyCertPairPrivateKeyArray,
                                                                   new UIntPtr((ulong)keyCertPairCertChainArray.Length),
diff --git a/src/csharp/Grpc.Core/Internal/Timespec.cs b/src/csharp/Grpc.Core/Internal/Timespec.cs
index 148d877da5a2e1cb8c00c5d99834339aa2f1bb37..754be4e03531e85851ec51ffa61270b8c5a0d1b7 100644
--- a/src/csharp/Grpc.Core/Internal/Timespec.cs
+++ b/src/csharp/Grpc.Core/Internal/Timespec.cs
@@ -141,8 +141,8 @@ namespace Grpc.Core.Internal
         /// </summary>
         public DateTime ToDateTime()
         {
-            Preconditions.CheckState(tv_nsec >= 0 && tv_nsec < NanosPerSecond);
-            Preconditions.CheckState(clock_type == GPRClockType.Realtime);
+            GrpcPreconditions.CheckState(tv_nsec >= 0 && tv_nsec < NanosPerSecond);
+            GrpcPreconditions.CheckState(clock_type == GPRClockType.Realtime);
 
             // fast path for InfFuture
             if (this.Equals(InfFuture))
@@ -195,7 +195,7 @@ namespace Grpc.Core.Internal
                 return Timespec.InfPast;
             }
 
-            Preconditions.CheckArgument(dateTime.Kind == DateTimeKind.Utc, "dateTime needs of kind DateTimeKind.Utc or be equal to DateTime.MaxValue or DateTime.MinValue.");
+            GrpcPreconditions.CheckArgument(dateTime.Kind == DateTimeKind.Utc, "dateTime needs of kind DateTimeKind.Utc or be equal to DateTime.MaxValue or DateTime.MinValue.");
 
             try
             {
diff --git a/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs b/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs
index 95a8797e3eefde879cc645f798b87de8d7cc9380..e763c1502575a3026822fcdcb7c90b0a9fb16d14 100644
--- a/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs
+++ b/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs
@@ -65,7 +65,7 @@ namespace Grpc.Core.Internal
 
         public UnmanagedLibrary(string libraryPath)
         {
-            this.libraryPath = Preconditions.CheckNotNull(libraryPath);
+            this.libraryPath = GrpcPreconditions.CheckNotNull(libraryPath);
 
             if (!File.Exists(this.libraryPath))
             {
diff --git a/src/csharp/Grpc.Core/KeyCertificatePair.cs b/src/csharp/Grpc.Core/KeyCertificatePair.cs
index 6f691975e997f2d5ef3adfd50ce7df918ffee9a4..0fb6817986f8390a20ab4c363ef2e0baa8d13e69 100644
--- a/src/csharp/Grpc.Core/KeyCertificatePair.cs
+++ b/src/csharp/Grpc.Core/KeyCertificatePair.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -54,8 +54,8 @@ namespace Grpc.Core
         /// <param name="privateKey">PEM encoded private key.</param>
         public KeyCertificatePair(string certificateChain, string privateKey)
         {
-            this.certificateChain = Preconditions.CheckNotNull(certificateChain, "certificateChain");
-            this.privateKey = Preconditions.CheckNotNull(privateKey, "privateKey");
+            this.certificateChain = GrpcPreconditions.CheckNotNull(certificateChain, "certificateChain");
+            this.privateKey = GrpcPreconditions.CheckNotNull(privateKey, "privateKey");
         }
 
         /// <summary>
diff --git a/src/csharp/Grpc.Core/Marshaller.cs b/src/csharp/Grpc.Core/Marshaller.cs
index 3493d2d38f05b1886531991e6f3addece16de670..5847248c1aaea0069bc8027ffd560349709254f4 100644
--- a/src/csharp/Grpc.Core/Marshaller.cs
+++ b/src/csharp/Grpc.Core/Marshaller.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -51,8 +51,8 @@ namespace Grpc.Core
         /// <param name="deserializer">Function that will be used to deserialize messages.</param>
         public Marshaller(Func<T, byte[]> serializer, Func<byte[], T> deserializer)
         {
-            this.serializer = Preconditions.CheckNotNull(serializer, "serializer");
-            this.deserializer = Preconditions.CheckNotNull(deserializer, "deserializer");
+            this.serializer = GrpcPreconditions.CheckNotNull(serializer, "serializer");
+            this.deserializer = GrpcPreconditions.CheckNotNull(deserializer, "deserializer");
         }
 
         /// <summary>
diff --git a/src/csharp/Grpc.Core/Metadata.cs b/src/csharp/Grpc.Core/Metadata.cs
index 21bdf4f114507752ddcf13bd3ad6a7cf78d12c14..aa22f840d6c31a03dc7fc690ab99900067b05272 100644
--- a/src/csharp/Grpc.Core/Metadata.cs
+++ b/src/csharp/Grpc.Core/Metadata.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -179,7 +179,7 @@ namespace Grpc.Core
 
         private void CheckWriteable()
         {
-            Preconditions.CheckState(!readOnly, "Object is read only");
+            GrpcPreconditions.CheckState(!readOnly, "Object is read only");
         }
 
         #endregion
@@ -211,10 +211,10 @@ namespace Grpc.Core
             public Entry(string key, byte[] valueBytes)
             {
                 this.key = NormalizeKey(key);
-                Preconditions.CheckArgument(this.key.EndsWith(BinaryHeaderSuffix),
+                GrpcPreconditions.CheckArgument(this.key.EndsWith(BinaryHeaderSuffix),
                     "Key for binary valued metadata entry needs to have suffix indicating binary value.");
                 this.value = null;
-                Preconditions.CheckNotNull(valueBytes, "valueBytes");
+                GrpcPreconditions.CheckNotNull(valueBytes, "valueBytes");
                 this.valueBytes = new byte[valueBytes.Length];
                 Buffer.BlockCopy(valueBytes, 0, this.valueBytes, 0, valueBytes.Length);  // defensive copy to guarantee immutability
             }
@@ -227,9 +227,9 @@ namespace Grpc.Core
             public Entry(string key, string value)
             {
                 this.key = NormalizeKey(key);
-                Preconditions.CheckArgument(!this.key.EndsWith(BinaryHeaderSuffix),
+                GrpcPreconditions.CheckArgument(!this.key.EndsWith(BinaryHeaderSuffix),
                     "Key for ASCII valued metadata entry cannot have suffix indicating binary value.");
-                this.value = Preconditions.CheckNotNull(value, "value");
+                this.value = GrpcPreconditions.CheckNotNull(value, "value");
                 this.valueBytes = null;
             }
 
@@ -270,7 +270,7 @@ namespace Grpc.Core
             {
                 get
                 {
-                    Preconditions.CheckState(!IsBinary, "Cannot access string value of a binary metadata entry");
+                    GrpcPreconditions.CheckState(!IsBinary, "Cannot access string value of a binary metadata entry");
                     return value ?? Encoding.GetString(valueBytes);
                 }
             }
@@ -323,8 +323,8 @@ namespace Grpc.Core
 
             private static string NormalizeKey(string key)
             {
-                var normalized = Preconditions.CheckNotNull(key, "key").ToLower(CultureInfo.InvariantCulture);
-                Preconditions.CheckArgument(ValidKeyRegex.IsMatch(normalized), 
+                var normalized = GrpcPreconditions.CheckNotNull(key, "key").ToLower(CultureInfo.InvariantCulture);
+                GrpcPreconditions.CheckArgument(ValidKeyRegex.IsMatch(normalized), 
                     "Metadata entry key not valid. Keys can only contain lowercase alphanumeric characters, underscores and hyphens.");
                 return normalized;
             }
diff --git a/src/csharp/Grpc.Core/Method.cs b/src/csharp/Grpc.Core/Method.cs
index 99162a7d5dd065fa3a89b955836a3cfbcc1c00ce..3870076f7f9c7816cd0f035ac4bfa938471d1223 100644
--- a/src/csharp/Grpc.Core/Method.cs
+++ b/src/csharp/Grpc.Core/Method.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -106,10 +106,10 @@ namespace Grpc.Core
         public Method(MethodType type, string serviceName, string name, Marshaller<TRequest> requestMarshaller, Marshaller<TResponse> responseMarshaller)
         {
             this.type = type;
-            this.serviceName = Preconditions.CheckNotNull(serviceName, "serviceName");
-            this.name = Preconditions.CheckNotNull(name, "name");
-            this.requestMarshaller = Preconditions.CheckNotNull(requestMarshaller, "requestMarshaller");
-            this.responseMarshaller = Preconditions.CheckNotNull(responseMarshaller, "responseMarshaller");
+            this.serviceName = GrpcPreconditions.CheckNotNull(serviceName, "serviceName");
+            this.name = GrpcPreconditions.CheckNotNull(name, "name");
+            this.requestMarshaller = GrpcPreconditions.CheckNotNull(requestMarshaller, "requestMarshaller");
+            this.responseMarshaller = GrpcPreconditions.CheckNotNull(responseMarshaller, "responseMarshaller");
             this.fullName = GetFullName(serviceName, name);
         }
 
diff --git a/src/csharp/Grpc.Core/Server.cs b/src/csharp/Grpc.Core/Server.cs
index d120f95fdf98e46db385378ccfa10ff117114929..5d0fc6b1f0c81e6f88895bb47f367a02ae296d70 100644
--- a/src/csharp/Grpc.Core/Server.cs
+++ b/src/csharp/Grpc.Core/Server.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -125,7 +125,7 @@ namespace Grpc.Core
         {
             lock (myLock)
             {
-                Preconditions.CheckState(!startRequested);
+                GrpcPreconditions.CheckState(!startRequested);
                 startRequested = true;
                 
                 handle.Start();
@@ -142,8 +142,8 @@ namespace Grpc.Core
         {
             lock (myLock)
             {
-                Preconditions.CheckState(startRequested);
-                Preconditions.CheckState(!shutdownRequested);
+                GrpcPreconditions.CheckState(startRequested);
+                GrpcPreconditions.CheckState(!shutdownRequested);
                 shutdownRequested = true;
             }
 
@@ -162,8 +162,8 @@ namespace Grpc.Core
         {
             lock (myLock)
             {
-                Preconditions.CheckState(startRequested);
-                Preconditions.CheckState(!shutdownRequested);
+                GrpcPreconditions.CheckState(startRequested);
+                GrpcPreconditions.CheckState(!shutdownRequested);
                 shutdownRequested = true;
             }
 
@@ -181,7 +181,7 @@ namespace Grpc.Core
 
             bool success = false;
             handle.DangerousAddRef(ref success);
-            Preconditions.CheckState(success);
+            GrpcPreconditions.CheckState(success);
         }
 
         internal void RemoveCallReference(object call)
@@ -197,7 +197,7 @@ namespace Grpc.Core
         {
             lock (myLock)
             {
-                Preconditions.CheckState(!startRequested);
+                GrpcPreconditions.CheckState(!startRequested);
                 foreach (var entry in serviceDefinition.CallHandlers)
                 {
                     callHandlers.Add(entry.Key, entry.Value);
@@ -213,8 +213,8 @@ namespace Grpc.Core
         {
             lock (myLock)
             {
-                Preconditions.CheckNotNull(serverPort.Credentials, "serverPort");
-                Preconditions.CheckState(!startRequested);
+                GrpcPreconditions.CheckNotNull(serverPort.Credentials, "serverPort");
+                GrpcPreconditions.CheckState(!startRequested);
                 var address = string.Format("{0}:{1}", serverPort.Host, serverPort.Port);
                 int boundPort;
                 using (var nativeCredentials = serverPort.Credentials.ToNativeCredentials())
diff --git a/src/csharp/Grpc.Core/ServerCredentials.cs b/src/csharp/Grpc.Core/ServerCredentials.cs
index 3c6703d30e518fd398318bbddd523861e7e920d9..456d331c9c317b5d0e2f402f7dfb0298bdb542f0 100644
--- a/src/csharp/Grpc.Core/ServerCredentials.cs
+++ b/src/csharp/Grpc.Core/ServerCredentials.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -90,11 +90,11 @@ namespace Grpc.Core
         public SslServerCredentials(IEnumerable<KeyCertificatePair> keyCertificatePairs, string rootCertificates, bool forceClientAuth)
         {
             this.keyCertificatePairs = new List<KeyCertificatePair>(keyCertificatePairs).AsReadOnly();
-            Preconditions.CheckArgument(this.keyCertificatePairs.Count > 0,
+            GrpcPreconditions.CheckArgument(this.keyCertificatePairs.Count > 0,
                 "At least one KeyCertificatePair needs to be provided.");
             if (forceClientAuth)
             {
-                Preconditions.CheckNotNull(rootCertificates,
+                GrpcPreconditions.CheckNotNull(rootCertificates,
                     "Cannot force client authentication unless you provide rootCertificates.");
             }
             this.rootCertificates = rootCertificates;
diff --git a/src/csharp/Grpc.Core/ServerPort.cs b/src/csharp/Grpc.Core/ServerPort.cs
index 598404d04592f12d7f542588da425f6b9ab8d190..10ddcb782fc342c3f8fde6b803aae885d0eb8b02 100644
--- a/src/csharp/Grpc.Core/ServerPort.cs
+++ b/src/csharp/Grpc.Core/ServerPort.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -62,9 +62,9 @@ namespace Grpc.Core
         /// <param name="credentials">credentials to use to secure this port.</param>
         public ServerPort(string host, int port, ServerCredentials credentials)
         {
-            this.host = Preconditions.CheckNotNull(host, "host");
+            this.host = GrpcPreconditions.CheckNotNull(host, "host");
             this.port = port;
-            this.credentials = Preconditions.CheckNotNull(credentials, "credentials");
+            this.credentials = GrpcPreconditions.CheckNotNull(credentials, "credentials");
         }
 
         /// <summary>
diff --git a/src/csharp/Grpc.Core/Utils/Preconditions.cs b/src/csharp/Grpc.Core/Utils/GrpcPreconditions.cs
similarity index 98%
rename from src/csharp/Grpc.Core/Utils/Preconditions.cs
rename to src/csharp/Grpc.Core/Utils/GrpcPreconditions.cs
index a8ab603391fc8dd59b2751fc4782ffa091d2625a..76bf04ce8b2091c56b00d5104db26757dc2caf77 100644
--- a/src/csharp/Grpc.Core/Utils/Preconditions.cs
+++ b/src/csharp/Grpc.Core/Utils/GrpcPreconditions.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -38,7 +38,7 @@ namespace Grpc.Core.Utils
     /// <summary>
     /// Utility methods to simplify checking preconditions in the code.
     /// </summary>
-    public static class Preconditions
+    public static class GrpcPreconditions
     {
         /// <summary>
         /// Throws <see cref="ArgumentException"/> if condition is false.
diff --git a/src/csharp/Grpc.HealthCheck/HealthServiceImpl.cs b/src/csharp/Grpc.HealthCheck/HealthServiceImpl.cs
index 26c6445c357e5ebfebbaae2790aced9a1000663c..e2ad1a834bfd57c9943c369e8c7dd91e476f5802 100644
--- a/src/csharp/Grpc.HealthCheck/HealthServiceImpl.cs
+++ b/src/csharp/Grpc.HealthCheck/HealthServiceImpl.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -127,8 +127,8 @@ namespace Grpc.HealthCheck
         {
             public Key(string host, string service)
             {
-                this.Host = Preconditions.CheckNotNull(host);
-                this.Service = Preconditions.CheckNotNull(service);
+                this.Host = GrpcPreconditions.CheckNotNull(host);
+                this.Service = GrpcPreconditions.CheckNotNull(service);
             }
 
             readonly string Host;
diff --git a/src/csharp/Grpc.IntegrationTesting/ClientRunners.cs b/src/csharp/Grpc.IntegrationTesting/ClientRunners.cs
index e9e659cb1fb188b930cde1394cc97c2af7bbfe2b..c4016012cbb63face4aeb366578e1f4f4f46c3b3 100644
--- a/src/csharp/Grpc.IntegrationTesting/ClientRunners.cs
+++ b/src/csharp/Grpc.IntegrationTesting/ClientRunners.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -58,7 +58,7 @@ namespace Grpc.IntegrationTesting
         public static IClientRunner CreateStarted(ClientConfig config)
         {
             string target = config.ServerTargets.Single();
-            Grpc.Core.Utils.Preconditions.CheckArgument(config.LoadParams.LoadCase == LoadParams.LoadOneofCase.ClosedLoop);
+            GrpcPreconditions.CheckArgument(config.LoadParams.LoadCase == LoadParams.LoadOneofCase.ClosedLoop);
 
             var credentials = config.SecurityParams != null ? TestCredentials.CreateSslCredentials() : ChannelCredentials.Insecure;
             var channel = new Channel(target, credentials);
@@ -95,7 +95,7 @@ namespace Grpc.IntegrationTesting
         
         public SyncUnaryClientRunner(Channel channel, int payloadSize, HistogramParams histogramParams)
         {
-            this.channel = Grpc.Core.Utils.Preconditions.CheckNotNull(channel);
+            this.channel = GrpcPreconditions.CheckNotNull(channel);
             this.payloadSize = payloadSize;
             this.histogram = new Histogram(histogramParams.Resolution, histogramParams.MaxPossible);
 
diff --git a/src/csharp/Grpc.IntegrationTesting/Control.cs b/src/csharp/Grpc.IntegrationTesting/Control.cs
index b90243c2bd501c49c89e0d1e0b45d9bb131213c5..291bc753978b74a1466b9d97fb6bb32e5cb53c71 100644
--- a/src/csharp/Grpc.IntegrationTesting/Control.cs
+++ b/src/csharp/Grpc.IntegrationTesting/Control.cs
@@ -38,7 +38,7 @@ namespace Grpc.Testing {
             "LmdycGMudGVzdGluZy5EZXRlcm1pbmlzdGljUGFyYW1zSAASLAoGcGFyZXRv",
             "GAUgASgLMhouZ3JwYy50ZXN0aW5nLlBhcmV0b1BhcmFtc0gAQgYKBGxvYWQi",
             "QwoOU2VjdXJpdHlQYXJhbXMSEwoLdXNlX3Rlc3RfY2EYASABKAgSHAoUc2Vy",
-            "dmVyX2hvc3Rfb3ZlcnJpZGUYAiABKAkirwMKDENsaWVudENvbmZpZxIWCg5z",
+            "dmVyX2hvc3Rfb3ZlcnJpZGUYAiABKAki1gMKDENsaWVudENvbmZpZxIWCg5z",
             "ZXJ2ZXJfdGFyZ2V0cxgBIAMoCRItCgtjbGllbnRfdHlwZRgCIAEoDjIYLmdy",
             "cGMudGVzdGluZy5DbGllbnRUeXBlEjUKD3NlY3VyaXR5X3BhcmFtcxgDIAEo",
             "CzIcLmdycGMudGVzdGluZy5TZWN1cml0eVBhcmFtcxIkChxvdXRzdGFuZGlu",
@@ -48,24 +48,27 @@ namespace Grpc.Testing {
             "GAogASgLMhguZ3JwYy50ZXN0aW5nLkxvYWRQYXJhbXMSMwoOcGF5bG9hZF9j",
             "b25maWcYCyABKAsyGy5ncnBjLnRlc3RpbmcuUGF5bG9hZENvbmZpZxI3ChBo",
             "aXN0b2dyYW1fcGFyYW1zGAwgASgLMh0uZ3JwYy50ZXN0aW5nLkhpc3RvZ3Jh",
-            "bVBhcmFtcyI4CgxDbGllbnRTdGF0dXMSKAoFc3RhdHMYASABKAsyGS5ncnBj",
-            "LnRlc3RpbmcuQ2xpZW50U3RhdHMiFQoETWFyaxINCgVyZXNldBgBIAEoCCJo",
-            "CgpDbGllbnRBcmdzEisKBXNldHVwGAEgASgLMhouZ3JwYy50ZXN0aW5nLkNs",
-            "aWVudENvbmZpZ0gAEiIKBG1hcmsYAiABKAsyEi5ncnBjLnRlc3RpbmcuTWFy",
-            "a0gAQgkKB2FyZ3R5cGUi9wEKDFNlcnZlckNvbmZpZxItCgtzZXJ2ZXJfdHlw",
-            "ZRgBIAEoDjIYLmdycGMudGVzdGluZy5TZXJ2ZXJUeXBlEjUKD3NlY3VyaXR5",
-            "X3BhcmFtcxgCIAEoCzIcLmdycGMudGVzdGluZy5TZWN1cml0eVBhcmFtcxIM",
-            "CgRob3N0GAMgASgJEgwKBHBvcnQYBCABKAUSHAoUYXN5bmNfc2VydmVyX3Ro",
-            "cmVhZHMYByABKAUSEgoKY29yZV9saW1pdBgIIAEoBRIzCg5wYXlsb2FkX2Nv",
-            "bmZpZxgJIAEoCzIbLmdycGMudGVzdGluZy5QYXlsb2FkQ29uZmlnImgKClNl",
-            "cnZlckFyZ3MSKwoFc2V0dXAYASABKAsyGi5ncnBjLnRlc3RpbmcuU2VydmVy",
-            "Q29uZmlnSAASIgoEbWFyaxgCIAEoCzISLmdycGMudGVzdGluZy5NYXJrSABC",
-            "CQoHYXJndHlwZSJVCgxTZXJ2ZXJTdGF0dXMSKAoFc3RhdHMYASABKAsyGS5n",
-            "cnBjLnRlc3RpbmcuU2VydmVyU3RhdHMSDAoEcG9ydBgCIAEoBRINCgVjb3Jl",
-            "cxgDIAEoBSovCgpDbGllbnRUeXBlEg8KC1NZTkNfQ0xJRU5UEAASEAoMQVNZ",
-            "TkNfQ0xJRU5UEAEqLwoKU2VydmVyVHlwZRIPCgtTWU5DX1NFUlZFUhAAEhAK",
-            "DEFTWU5DX1NFUlZFUhABKiMKB1JwY1R5cGUSCQoFVU5BUlkQABINCglTVFJF",
-            "QU1JTkcQAWIGcHJvdG8z"));
+            "bVBhcmFtcxIRCgljb3JlX2xpc3QYDSADKAUSEgoKY29yZV9saW1pdBgOIAEo",
+            "BSI4CgxDbGllbnRTdGF0dXMSKAoFc3RhdHMYASABKAsyGS5ncnBjLnRlc3Rp",
+            "bmcuQ2xpZW50U3RhdHMiFQoETWFyaxINCgVyZXNldBgBIAEoCCJoCgpDbGll",
+            "bnRBcmdzEisKBXNldHVwGAEgASgLMhouZ3JwYy50ZXN0aW5nLkNsaWVudENv",
+            "bmZpZ0gAEiIKBG1hcmsYAiABKAsyEi5ncnBjLnRlc3RpbmcuTWFya0gAQgkK",
+            "B2FyZ3R5cGUi/AEKDFNlcnZlckNvbmZpZxItCgtzZXJ2ZXJfdHlwZRgBIAEo",
+            "DjIYLmdycGMudGVzdGluZy5TZXJ2ZXJUeXBlEjUKD3NlY3VyaXR5X3BhcmFt",
+            "cxgCIAEoCzIcLmdycGMudGVzdGluZy5TZWN1cml0eVBhcmFtcxIMCgRwb3J0",
+            "GAQgASgFEhwKFGFzeW5jX3NlcnZlcl90aHJlYWRzGAcgASgFEhIKCmNvcmVf",
+            "bGltaXQYCCABKAUSMwoOcGF5bG9hZF9jb25maWcYCSABKAsyGy5ncnBjLnRl",
+            "c3RpbmcuUGF5bG9hZENvbmZpZxIRCgljb3JlX2xpc3QYCiADKAUiaAoKU2Vy",
+            "dmVyQXJncxIrCgVzZXR1cBgBIAEoCzIaLmdycGMudGVzdGluZy5TZXJ2ZXJD",
+            "b25maWdIABIiCgRtYXJrGAIgASgLMhIuZ3JwYy50ZXN0aW5nLk1hcmtIAEIJ",
+            "Cgdhcmd0eXBlIlUKDFNlcnZlclN0YXR1cxIoCgVzdGF0cxgBIAEoCzIZLmdy",
+            "cGMudGVzdGluZy5TZXJ2ZXJTdGF0cxIMCgRwb3J0GAIgASgFEg0KBWNvcmVz",
+            "GAMgASgFIg0KC0NvcmVSZXF1ZXN0Ih0KDENvcmVSZXNwb25zZRINCgVjb3Jl",
+            "cxgBIAEoBSIGCgRWb2lkKi8KCkNsaWVudFR5cGUSDwoLU1lOQ19DTElFTlQQ",
+            "ABIQCgxBU1lOQ19DTElFTlQQASpJCgpTZXJ2ZXJUeXBlEg8KC1NZTkNfU0VS",
+            "VkVSEAASEAoMQVNZTkNfU0VSVkVSEAESGAoUQVNZTkNfR0VORVJJQ19TRVJW",
+            "RVIQAiojCgdScGNUeXBlEgkKBVVOQVJZEAASDQoJU1RSRUFNSU5HEAFiBnBy",
+            "b3RvMw=="));
       descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
           new pbr::FileDescriptor[] { global::Grpc.Testing.PayloadsReflection.Descriptor, global::Grpc.Testing.StatsReflection.Descriptor, },
           new pbr::GeneratedCodeInfo(new[] {typeof(global::Grpc.Testing.ClientType), typeof(global::Grpc.Testing.ServerType), typeof(global::Grpc.Testing.RpcType), }, new pbr::GeneratedCodeInfo[] {
@@ -76,13 +79,16 @@ namespace Grpc.Testing {
             new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.ClosedLoopParams), global::Grpc.Testing.ClosedLoopParams.Parser, null, null, null, null),
             new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.LoadParams), global::Grpc.Testing.LoadParams.Parser, new[]{ "ClosedLoop", "Poisson", "Uniform", "Determ", "Pareto" }, new[]{ "Load" }, null, null),
             new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.SecurityParams), global::Grpc.Testing.SecurityParams.Parser, new[]{ "UseTestCa", "ServerHostOverride" }, null, null, null),
-            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.ClientConfig), global::Grpc.Testing.ClientConfig.Parser, new[]{ "ServerTargets", "ClientType", "SecurityParams", "OutstandingRpcsPerChannel", "ClientChannels", "AsyncClientThreads", "RpcType", "LoadParams", "PayloadConfig", "HistogramParams" }, null, null, null),
+            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.ClientConfig), global::Grpc.Testing.ClientConfig.Parser, new[]{ "ServerTargets", "ClientType", "SecurityParams", "OutstandingRpcsPerChannel", "ClientChannels", "AsyncClientThreads", "RpcType", "LoadParams", "PayloadConfig", "HistogramParams", "CoreList", "CoreLimit" }, null, null, null),
             new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.ClientStatus), global::Grpc.Testing.ClientStatus.Parser, new[]{ "Stats" }, null, null, null),
             new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.Mark), global::Grpc.Testing.Mark.Parser, new[]{ "Reset" }, null, null, null),
             new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.ClientArgs), global::Grpc.Testing.ClientArgs.Parser, new[]{ "Setup", "Mark" }, new[]{ "Argtype" }, null, null),
-            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.ServerConfig), global::Grpc.Testing.ServerConfig.Parser, new[]{ "ServerType", "SecurityParams", "Host", "Port", "AsyncServerThreads", "CoreLimit", "PayloadConfig" }, null, null, null),
+            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.ServerConfig), global::Grpc.Testing.ServerConfig.Parser, new[]{ "ServerType", "SecurityParams", "Port", "AsyncServerThreads", "CoreLimit", "PayloadConfig", "CoreList" }, null, null, null),
             new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.ServerArgs), global::Grpc.Testing.ServerArgs.Parser, new[]{ "Setup", "Mark" }, new[]{ "Argtype" }, null, null),
-            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.ServerStatus), global::Grpc.Testing.ServerStatus.Parser, new[]{ "Stats", "Port", "Cores" }, null, null, null)
+            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.ServerStatus), global::Grpc.Testing.ServerStatus.Parser, new[]{ "Stats", "Port", "Cores" }, null, null, null),
+            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.CoreRequest), global::Grpc.Testing.CoreRequest.Parser, null, null, null, null),
+            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.CoreResponse), global::Grpc.Testing.CoreResponse.Parser, new[]{ "Cores" }, null, null, null),
+            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.Void), global::Grpc.Testing.Void.Parser, null, null, null, null)
           }));
     }
     #endregion
@@ -97,6 +103,7 @@ namespace Grpc.Testing {
   public enum ServerType {
     SYNC_SERVER = 0,
     ASYNC_SERVER = 1,
+    ASYNC_GENERIC_SERVER = 2,
   }
 
   public enum RpcType {
@@ -1097,6 +1104,8 @@ namespace Grpc.Testing {
       LoadParams = other.loadParams_ != null ? other.LoadParams.Clone() : null;
       PayloadConfig = other.payloadConfig_ != null ? other.PayloadConfig.Clone() : null;
       HistogramParams = other.histogramParams_ != null ? other.HistogramParams.Clone() : null;
+      coreList_ = other.coreList_.Clone();
+      coreLimit_ = other.coreLimit_;
     }
 
     public ClientConfig Clone() {
@@ -1219,6 +1228,28 @@ namespace Grpc.Testing {
       }
     }
 
+    /// <summary>Field number for the "core_list" field.</summary>
+    public const int CoreListFieldNumber = 13;
+    private static readonly pb::FieldCodec<int> _repeated_coreList_codec
+        = pb::FieldCodec.ForInt32(106);
+    private readonly pbc::RepeatedField<int> coreList_ = new pbc::RepeatedField<int>();
+    /// <summary>
+    ///  Specify the cores we should run the client on, if desired
+    /// </summary>
+    public pbc::RepeatedField<int> CoreList {
+      get { return coreList_; }
+    }
+
+    /// <summary>Field number for the "core_limit" field.</summary>
+    public const int CoreLimitFieldNumber = 14;
+    private int coreLimit_;
+    public int CoreLimit {
+      get { return coreLimit_; }
+      set {
+        coreLimit_ = value;
+      }
+    }
+
     public override bool Equals(object other) {
       return Equals(other as ClientConfig);
     }
@@ -1240,6 +1271,8 @@ namespace Grpc.Testing {
       if (!object.Equals(LoadParams, other.LoadParams)) return false;
       if (!object.Equals(PayloadConfig, other.PayloadConfig)) return false;
       if (!object.Equals(HistogramParams, other.HistogramParams)) return false;
+      if(!coreList_.Equals(other.coreList_)) return false;
+      if (CoreLimit != other.CoreLimit) return false;
       return true;
     }
 
@@ -1255,6 +1288,8 @@ namespace Grpc.Testing {
       if (loadParams_ != null) hash ^= LoadParams.GetHashCode();
       if (payloadConfig_ != null) hash ^= PayloadConfig.GetHashCode();
       if (histogramParams_ != null) hash ^= HistogramParams.GetHashCode();
+      hash ^= coreList_.GetHashCode();
+      if (CoreLimit != 0) hash ^= CoreLimit.GetHashCode();
       return hash;
     }
 
@@ -1300,6 +1335,11 @@ namespace Grpc.Testing {
         output.WriteRawTag(98);
         output.WriteMessage(HistogramParams);
       }
+      coreList_.WriteTo(output, _repeated_coreList_codec);
+      if (CoreLimit != 0) {
+        output.WriteRawTag(112);
+        output.WriteInt32(CoreLimit);
+      }
     }
 
     public int CalculateSize() {
@@ -1332,6 +1372,10 @@ namespace Grpc.Testing {
       if (histogramParams_ != null) {
         size += 1 + pb::CodedOutputStream.ComputeMessageSize(HistogramParams);
       }
+      size += coreList_.CalculateSize(_repeated_coreList_codec);
+      if (CoreLimit != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeInt32Size(CoreLimit);
+      }
       return size;
     }
 
@@ -1379,6 +1423,10 @@ namespace Grpc.Testing {
         }
         HistogramParams.MergeFrom(other.HistogramParams);
       }
+      coreList_.Add(other.coreList_);
+      if (other.CoreLimit != 0) {
+        CoreLimit = other.CoreLimit;
+      }
     }
 
     public void MergeFrom(pb::CodedInputStream input) {
@@ -1440,6 +1488,15 @@ namespace Grpc.Testing {
             input.ReadMessage(histogramParams_);
             break;
           }
+          case 106:
+          case 104: {
+            coreList_.AddEntriesFrom(input, _repeated_coreList_codec);
+            break;
+          }
+          case 112: {
+            CoreLimit = input.ReadInt32();
+            break;
+          }
         }
       }
     }
@@ -1855,11 +1912,11 @@ namespace Grpc.Testing {
     public ServerConfig(ServerConfig other) : this() {
       serverType_ = other.serverType_;
       SecurityParams = other.securityParams_ != null ? other.SecurityParams.Clone() : null;
-      host_ = other.host_;
       port_ = other.port_;
       asyncServerThreads_ = other.asyncServerThreads_;
       coreLimit_ = other.coreLimit_;
       PayloadConfig = other.payloadConfig_ != null ? other.PayloadConfig.Clone() : null;
+      coreList_ = other.coreList_.Clone();
     }
 
     public ServerConfig Clone() {
@@ -1886,19 +1943,6 @@ namespace Grpc.Testing {
       }
     }
 
-    /// <summary>Field number for the "host" field.</summary>
-    public const int HostFieldNumber = 3;
-    private string host_ = "";
-    /// <summary>
-    ///  Host on which to listen.
-    /// </summary>
-    public string Host {
-      get { return host_; }
-      set {
-        host_ = pb::Preconditions.CheckNotNull(value, "value");
-      }
-    }
-
     /// <summary>Field number for the "port" field.</summary>
     public const int PortFieldNumber = 4;
     private int port_;
@@ -1929,7 +1973,7 @@ namespace Grpc.Testing {
     public const int CoreLimitFieldNumber = 8;
     private int coreLimit_;
     /// <summary>
-    ///  restrict core usage, currently unused
+    ///  Specify the number of cores to limit server to, if desired
     /// </summary>
     public int CoreLimit {
       get { return coreLimit_; }
@@ -1941,6 +1985,9 @@ namespace Grpc.Testing {
     /// <summary>Field number for the "payload_config" field.</summary>
     public const int PayloadConfigFieldNumber = 9;
     private global::Grpc.Testing.PayloadConfig payloadConfig_;
+    /// <summary>
+    ///  payload config, used in generic server
+    /// </summary>
     public global::Grpc.Testing.PayloadConfig PayloadConfig {
       get { return payloadConfig_; }
       set {
@@ -1948,6 +1995,18 @@ namespace Grpc.Testing {
       }
     }
 
+    /// <summary>Field number for the "core_list" field.</summary>
+    public const int CoreListFieldNumber = 10;
+    private static readonly pb::FieldCodec<int> _repeated_coreList_codec
+        = pb::FieldCodec.ForInt32(82);
+    private readonly pbc::RepeatedField<int> coreList_ = new pbc::RepeatedField<int>();
+    /// <summary>
+    ///  Specify the cores we should run the server on, if desired
+    /// </summary>
+    public pbc::RepeatedField<int> CoreList {
+      get { return coreList_; }
+    }
+
     public override bool Equals(object other) {
       return Equals(other as ServerConfig);
     }
@@ -1961,11 +2020,11 @@ namespace Grpc.Testing {
       }
       if (ServerType != other.ServerType) return false;
       if (!object.Equals(SecurityParams, other.SecurityParams)) return false;
-      if (Host != other.Host) return false;
       if (Port != other.Port) return false;
       if (AsyncServerThreads != other.AsyncServerThreads) return false;
       if (CoreLimit != other.CoreLimit) return false;
       if (!object.Equals(PayloadConfig, other.PayloadConfig)) return false;
+      if(!coreList_.Equals(other.coreList_)) return false;
       return true;
     }
 
@@ -1973,11 +2032,11 @@ namespace Grpc.Testing {
       int hash = 1;
       if (ServerType != global::Grpc.Testing.ServerType.SYNC_SERVER) hash ^= ServerType.GetHashCode();
       if (securityParams_ != null) hash ^= SecurityParams.GetHashCode();
-      if (Host.Length != 0) hash ^= Host.GetHashCode();
       if (Port != 0) hash ^= Port.GetHashCode();
       if (AsyncServerThreads != 0) hash ^= AsyncServerThreads.GetHashCode();
       if (CoreLimit != 0) hash ^= CoreLimit.GetHashCode();
       if (payloadConfig_ != null) hash ^= PayloadConfig.GetHashCode();
+      hash ^= coreList_.GetHashCode();
       return hash;
     }
 
@@ -1994,10 +2053,6 @@ namespace Grpc.Testing {
         output.WriteRawTag(18);
         output.WriteMessage(SecurityParams);
       }
-      if (Host.Length != 0) {
-        output.WriteRawTag(26);
-        output.WriteString(Host);
-      }
       if (Port != 0) {
         output.WriteRawTag(32);
         output.WriteInt32(Port);
@@ -2014,6 +2069,7 @@ namespace Grpc.Testing {
         output.WriteRawTag(74);
         output.WriteMessage(PayloadConfig);
       }
+      coreList_.WriteTo(output, _repeated_coreList_codec);
     }
 
     public int CalculateSize() {
@@ -2024,9 +2080,6 @@ namespace Grpc.Testing {
       if (securityParams_ != null) {
         size += 1 + pb::CodedOutputStream.ComputeMessageSize(SecurityParams);
       }
-      if (Host.Length != 0) {
-        size += 1 + pb::CodedOutputStream.ComputeStringSize(Host);
-      }
       if (Port != 0) {
         size += 1 + pb::CodedOutputStream.ComputeInt32Size(Port);
       }
@@ -2039,6 +2092,7 @@ namespace Grpc.Testing {
       if (payloadConfig_ != null) {
         size += 1 + pb::CodedOutputStream.ComputeMessageSize(PayloadConfig);
       }
+      size += coreList_.CalculateSize(_repeated_coreList_codec);
       return size;
     }
 
@@ -2055,9 +2109,6 @@ namespace Grpc.Testing {
         }
         SecurityParams.MergeFrom(other.SecurityParams);
       }
-      if (other.Host.Length != 0) {
-        Host = other.Host;
-      }
       if (other.Port != 0) {
         Port = other.Port;
       }
@@ -2073,6 +2124,7 @@ namespace Grpc.Testing {
         }
         PayloadConfig.MergeFrom(other.PayloadConfig);
       }
+      coreList_.Add(other.coreList_);
     }
 
     public void MergeFrom(pb::CodedInputStream input) {
@@ -2093,10 +2145,6 @@ namespace Grpc.Testing {
             input.ReadMessage(securityParams_);
             break;
           }
-          case 26: {
-            Host = input.ReadString();
-            break;
-          }
           case 32: {
             Port = input.ReadInt32();
             break;
@@ -2116,6 +2164,11 @@ namespace Grpc.Testing {
             input.ReadMessage(payloadConfig_);
             break;
           }
+          case 82:
+          case 80: {
+            coreList_.AddEntriesFrom(input, _repeated_coreList_codec);
+            break;
+          }
         }
       }
     }
@@ -2347,7 +2400,7 @@ namespace Grpc.Testing {
     public const int CoresFieldNumber = 3;
     private int cores_;
     /// <summary>
-    ///  Number of cores on the server. See gpr_cpu_num_cores.
+    ///  Number of cores available to the server
     /// </summary>
     public int Cores {
       get { return cores_; }
@@ -2460,6 +2513,264 @@ namespace Grpc.Testing {
 
   }
 
+  [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+  public sealed partial class CoreRequest : pb::IMessage<CoreRequest> {
+    private static readonly pb::MessageParser<CoreRequest> _parser = new pb::MessageParser<CoreRequest>(() => new CoreRequest());
+    public static pb::MessageParser<CoreRequest> Parser { get { return _parser; } }
+
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[14]; }
+    }
+
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    public CoreRequest() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    public CoreRequest(CoreRequest other) : this() {
+    }
+
+    public CoreRequest Clone() {
+      return new CoreRequest(this);
+    }
+
+    public override bool Equals(object other) {
+      return Equals(other as CoreRequest);
+    }
+
+    public bool Equals(CoreRequest other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      return true;
+    }
+
+    public override int GetHashCode() {
+      int hash = 1;
+      return hash;
+    }
+
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    public void WriteTo(pb::CodedOutputStream output) {
+    }
+
+    public int CalculateSize() {
+      int size = 0;
+      return size;
+    }
+
+    public void MergeFrom(CoreRequest other) {
+      if (other == null) {
+        return;
+      }
+    }
+
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+        }
+      }
+    }
+
+  }
+
+  [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+  public sealed partial class CoreResponse : pb::IMessage<CoreResponse> {
+    private static readonly pb::MessageParser<CoreResponse> _parser = new pb::MessageParser<CoreResponse>(() => new CoreResponse());
+    public static pb::MessageParser<CoreResponse> Parser { get { return _parser; } }
+
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[15]; }
+    }
+
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    public CoreResponse() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    public CoreResponse(CoreResponse other) : this() {
+      cores_ = other.cores_;
+    }
+
+    public CoreResponse Clone() {
+      return new CoreResponse(this);
+    }
+
+    /// <summary>Field number for the "cores" field.</summary>
+    public const int CoresFieldNumber = 1;
+    private int cores_;
+    /// <summary>
+    ///  Number of cores available on the server
+    /// </summary>
+    public int Cores {
+      get { return cores_; }
+      set {
+        cores_ = value;
+      }
+    }
+
+    public override bool Equals(object other) {
+      return Equals(other as CoreResponse);
+    }
+
+    public bool Equals(CoreResponse other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if (Cores != other.Cores) return false;
+      return true;
+    }
+
+    public override int GetHashCode() {
+      int hash = 1;
+      if (Cores != 0) hash ^= Cores.GetHashCode();
+      return hash;
+    }
+
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    public void WriteTo(pb::CodedOutputStream output) {
+      if (Cores != 0) {
+        output.WriteRawTag(8);
+        output.WriteInt32(Cores);
+      }
+    }
+
+    public int CalculateSize() {
+      int size = 0;
+      if (Cores != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeInt32Size(Cores);
+      }
+      return size;
+    }
+
+    public void MergeFrom(CoreResponse other) {
+      if (other == null) {
+        return;
+      }
+      if (other.Cores != 0) {
+        Cores = other.Cores;
+      }
+    }
+
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 8: {
+            Cores = input.ReadInt32();
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
+  [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+  public sealed partial class Void : pb::IMessage<Void> {
+    private static readonly pb::MessageParser<Void> _parser = new pb::MessageParser<Void>(() => new Void());
+    public static pb::MessageParser<Void> Parser { get { return _parser; } }
+
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Testing.ControlReflection.Descriptor.MessageTypes[16]; }
+    }
+
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    public Void() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    public Void(Void other) : this() {
+    }
+
+    public Void Clone() {
+      return new Void(this);
+    }
+
+    public override bool Equals(object other) {
+      return Equals(other as Void);
+    }
+
+    public bool Equals(Void other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      return true;
+    }
+
+    public override int GetHashCode() {
+      int hash = 1;
+      return hash;
+    }
+
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    public void WriteTo(pb::CodedOutputStream output) {
+    }
+
+    public int CalculateSize() {
+      int size = 0;
+      return size;
+    }
+
+    public void MergeFrom(Void other) {
+      if (other == null) {
+        return;
+      }
+    }
+
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+        }
+      }
+    }
+
+  }
+
   #endregion
 
 }
diff --git a/src/csharp/Grpc.IntegrationTesting/Histogram.cs b/src/csharp/Grpc.IntegrationTesting/Histogram.cs
index 7e7cb2c4de0d59fe6a971d0320072afa7504f4fe..08a674d8178dc13e30bd49645c7757827b52325c 100644
--- a/src/csharp/Grpc.IntegrationTesting/Histogram.cs
+++ b/src/csharp/Grpc.IntegrationTesting/Histogram.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -66,8 +66,8 @@ namespace Grpc.IntegrationTesting
 
         public Histogram(double resolution, double maxPossible)
         {
-            Grpc.Core.Utils.Preconditions.CheckArgument(resolution > 0);
-            Grpc.Core.Utils.Preconditions.CheckArgument(maxPossible > 0);
+            GrpcPreconditions.CheckArgument(resolution > 0);
+            GrpcPreconditions.CheckArgument(maxPossible > 0);
             this.maxPossible = maxPossible;
             this.multiplier = 1.0 + resolution;
             this.oneOnLogMultiplier = 1.0 / Math.Log(1.0 + resolution);
diff --git a/src/csharp/Grpc.IntegrationTesting/QpsWorker.cs b/src/csharp/Grpc.IntegrationTesting/QpsWorker.cs
index 686b48434537ceef3967d121f0e27d989ad9f7cb..e407792c4b58ffa4f7d34e51c82212a8a2fd888e 100644
--- a/src/csharp/Grpc.IntegrationTesting/QpsWorker.cs
+++ b/src/csharp/Grpc.IntegrationTesting/QpsWorker.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -85,24 +85,27 @@ namespace Grpc.IntegrationTesting
             }
 
             var workerServer = new QpsWorker(options);
-            workerServer.Run();
+            workerServer.RunAsync().Wait();
         }
 
-        private void Run()
+        private async Task RunAsync()
         {
             string host = "0.0.0.0";
             int port = options.DriverPort;
 
+            var tcs = new TaskCompletionSource<object>();
+            var workerServiceImpl = new WorkerServiceImpl(() => { Task.Run(() => tcs.SetResult(null)); });
+                
             var server = new Server
             {
-                Services = { WorkerService.BindService(new WorkerServiceImpl()) },
+                Services = { WorkerService.BindService(workerServiceImpl) },
                 Ports = { new ServerPort(host, options.DriverPort, ServerCredentials.Insecure )}
             };
             int boundPort = server.Ports.Single().BoundPort;
             Console.WriteLine("Running qps worker server on " + string.Format("{0}:{1}", host, boundPort));
             server.Start();
-
-            server.ShutdownTask.Wait();
+            await tcs.Task;
+            await server.ShutdownAsync();
         }
     }
 }
diff --git a/src/csharp/Grpc.IntegrationTesting/RunnerClientServerTest.cs b/src/csharp/Grpc.IntegrationTesting/RunnerClientServerTest.cs
index 3dd91b794851b325523ec544599fa5331a202300..06d5ee93d8843167a31728fbcc0ced1ff50a51cb 100644
--- a/src/csharp/Grpc.IntegrationTesting/RunnerClientServerTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/RunnerClientServerTest.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -48,7 +48,6 @@ namespace Grpc.IntegrationTesting
     /// </summary>
     public class RunnerClientServerTest
     {
-        const string Host = "localhost";
         IServerRunner serverRunner;
 
         [TestFixtureSetUp]
@@ -57,7 +56,6 @@ namespace Grpc.IntegrationTesting
             var serverConfig = new ServerConfig
             {
                 ServerType = ServerType.ASYNC_SERVER,
-                Host = Host,
                 PayloadConfig = new PayloadConfig
                 {
                     SimpleParams = new SimpleProtoParams
@@ -83,7 +81,7 @@ namespace Grpc.IntegrationTesting
         {
             var config = new ClientConfig
             {
-                ServerTargets = { string.Format("{0}:{1}", Host, serverRunner.BoundPort) },
+                ServerTargets = { string.Format("{0}:{1}", "localhost", serverRunner.BoundPort) },
                 RpcType = RpcType.UNARY,
                 LoadParams = new LoadParams { ClosedLoop = new ClosedLoopParams() },
                 PayloadConfig = new PayloadConfig
diff --git a/src/csharp/Grpc.IntegrationTesting/ServerRunners.cs b/src/csharp/Grpc.IntegrationTesting/ServerRunners.cs
index e8be7758cee6f508e296a37d8ab2015e5decf42a..4a73645e6ca85369770fccb68ee874ed4cb54954 100644
--- a/src/csharp/Grpc.IntegrationTesting/ServerRunners.cs
+++ b/src/csharp/Grpc.IntegrationTesting/ServerRunners.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -57,7 +57,7 @@ namespace Grpc.IntegrationTesting
         /// </summary>
         public static IServerRunner CreateStarted(ServerConfig config)
         {
-            Grpc.Core.Utils.Preconditions.CheckArgument(config.ServerType == ServerType.ASYNC_SERVER);
+            GrpcPreconditions.CheckArgument(config.ServerType == ServerType.ASYNC_SERVER);
             var credentials = config.SecurityParams != null ? TestCredentials.CreateSslServerCredentials() : ServerCredentials.Insecure;
 
             // TODO: qps_driver needs to setup payload properly...
@@ -65,7 +65,7 @@ namespace Grpc.IntegrationTesting
             var server = new Server
             {
                 Services = { BenchmarkService.BindService(new BenchmarkServiceImpl(responseSize)) },
-                Ports = { new ServerPort(config.Host, config.Port, credentials) }
+                Ports = { new ServerPort("[::]", config.Port, credentials) }
             };
 
             server.Start();
@@ -83,7 +83,7 @@ namespace Grpc.IntegrationTesting
 
         public ServerRunnerImpl(Server server)
         {
-            this.server = Grpc.Core.Utils.Preconditions.CheckNotNull(server);
+            this.server = GrpcPreconditions.CheckNotNull(server);
         }
 
         public int BoundPort
diff --git a/src/csharp/Grpc.IntegrationTesting/Services.cs b/src/csharp/Grpc.IntegrationTesting/Services.cs
index 04a092ccd79cb1a3c68c624ba5ce1ff8974b9fe6..a8475c181720de6e4014bd05598d5313a21028c3 100644
--- a/src/csharp/Grpc.IntegrationTesting/Services.cs
+++ b/src/csharp/Grpc.IntegrationTesting/Services.cs
@@ -29,11 +29,14 @@ namespace Grpc.Testing {
             "QmVuY2htYXJrU2VydmljZRJGCglVbmFyeUNhbGwSGy5ncnBjLnRlc3Rpbmcu",
             "U2ltcGxlUmVxdWVzdBocLmdycGMudGVzdGluZy5TaW1wbGVSZXNwb25zZRJO",
             "Cg1TdHJlYW1pbmdDYWxsEhsuZ3JwYy50ZXN0aW5nLlNpbXBsZVJlcXVlc3Qa",
-            "HC5ncnBjLnRlc3RpbmcuU2ltcGxlUmVzcG9uc2UoATABMp0BCg1Xb3JrZXJT",
+            "HC5ncnBjLnRlc3RpbmcuU2ltcGxlUmVzcG9uc2UoATABMpcCCg1Xb3JrZXJT",
             "ZXJ2aWNlEkUKCVJ1blNlcnZlchIYLmdycGMudGVzdGluZy5TZXJ2ZXJBcmdz",
             "GhouZ3JwYy50ZXN0aW5nLlNlcnZlclN0YXR1cygBMAESRQoJUnVuQ2xpZW50",
             "EhguZ3JwYy50ZXN0aW5nLkNsaWVudEFyZ3MaGi5ncnBjLnRlc3RpbmcuQ2xp",
-            "ZW50U3RhdHVzKAEwAWIGcHJvdG8z"));
+            "ZW50U3RhdHVzKAEwARJCCglDb3JlQ291bnQSGS5ncnBjLnRlc3RpbmcuQ29y",
+            "ZVJlcXVlc3QaGi5ncnBjLnRlc3RpbmcuQ29yZVJlc3BvbnNlEjQKClF1aXRX",
+            "b3JrZXISEi5ncnBjLnRlc3RpbmcuVm9pZBoSLmdycGMudGVzdGluZy5Wb2lk",
+            "YgZwcm90bzM="));
       descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
           new pbr::FileDescriptor[] { global::Grpc.Testing.MessagesReflection.Descriptor, global::Grpc.Testing.ControlReflection.Descriptor, },
           new pbr::GeneratedCodeInfo(null, null));
diff --git a/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs b/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
index dd30afb427f8c6eeb9c7cc43f3d039c3dc1e76b4..996439afbf1395f4d8f64ae3a47d20a43ef6998d 100644
--- a/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
@@ -114,6 +114,9 @@ namespace Grpc.Testing {
     static readonly Marshaller<global::Grpc.Testing.ServerStatus> __Marshaller_ServerStatus = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.ServerStatus.Parser.ParseFrom);
     static readonly Marshaller<global::Grpc.Testing.ClientArgs> __Marshaller_ClientArgs = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.ClientArgs.Parser.ParseFrom);
     static readonly Marshaller<global::Grpc.Testing.ClientStatus> __Marshaller_ClientStatus = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.ClientStatus.Parser.ParseFrom);
+    static readonly Marshaller<global::Grpc.Testing.CoreRequest> __Marshaller_CoreRequest = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.CoreRequest.Parser.ParseFrom);
+    static readonly Marshaller<global::Grpc.Testing.CoreResponse> __Marshaller_CoreResponse = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.CoreResponse.Parser.ParseFrom);
+    static readonly Marshaller<global::Grpc.Testing.Void> __Marshaller_Void = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.Void.Parser.ParseFrom);
 
     static readonly Method<global::Grpc.Testing.ServerArgs, global::Grpc.Testing.ServerStatus> __Method_RunServer = new Method<global::Grpc.Testing.ServerArgs, global::Grpc.Testing.ServerStatus>(
         MethodType.DuplexStreaming,
@@ -129,6 +132,20 @@ namespace Grpc.Testing {
         __Marshaller_ClientArgs,
         __Marshaller_ClientStatus);
 
+    static readonly Method<global::Grpc.Testing.CoreRequest, global::Grpc.Testing.CoreResponse> __Method_CoreCount = new Method<global::Grpc.Testing.CoreRequest, global::Grpc.Testing.CoreResponse>(
+        MethodType.Unary,
+        __ServiceName,
+        "CoreCount",
+        __Marshaller_CoreRequest,
+        __Marshaller_CoreResponse);
+
+    static readonly Method<global::Grpc.Testing.Void, global::Grpc.Testing.Void> __Method_QuitWorker = new Method<global::Grpc.Testing.Void, global::Grpc.Testing.Void>(
+        MethodType.Unary,
+        __ServiceName,
+        "QuitWorker",
+        __Marshaller_Void,
+        __Marshaller_Void);
+
     // service descriptor
     public static global::Google.Protobuf.Reflection.ServiceDescriptor Descriptor
     {
@@ -142,6 +159,14 @@ namespace Grpc.Testing {
       AsyncDuplexStreamingCall<global::Grpc.Testing.ServerArgs, global::Grpc.Testing.ServerStatus> RunServer(CallOptions options);
       AsyncDuplexStreamingCall<global::Grpc.Testing.ClientArgs, global::Grpc.Testing.ClientStatus> RunClient(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
       AsyncDuplexStreamingCall<global::Grpc.Testing.ClientArgs, global::Grpc.Testing.ClientStatus> RunClient(CallOptions options);
+      global::Grpc.Testing.CoreResponse CoreCount(global::Grpc.Testing.CoreRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
+      global::Grpc.Testing.CoreResponse CoreCount(global::Grpc.Testing.CoreRequest request, CallOptions options);
+      AsyncUnaryCall<global::Grpc.Testing.CoreResponse> CoreCountAsync(global::Grpc.Testing.CoreRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
+      AsyncUnaryCall<global::Grpc.Testing.CoreResponse> CoreCountAsync(global::Grpc.Testing.CoreRequest request, CallOptions options);
+      global::Grpc.Testing.Void QuitWorker(global::Grpc.Testing.Void request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
+      global::Grpc.Testing.Void QuitWorker(global::Grpc.Testing.Void request, CallOptions options);
+      AsyncUnaryCall<global::Grpc.Testing.Void> QuitWorkerAsync(global::Grpc.Testing.Void request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
+      AsyncUnaryCall<global::Grpc.Testing.Void> QuitWorkerAsync(global::Grpc.Testing.Void request, CallOptions options);
     }
 
     // server-side interface
@@ -149,6 +174,8 @@ namespace Grpc.Testing {
     {
       Task RunServer(IAsyncStreamReader<global::Grpc.Testing.ServerArgs> requestStream, IServerStreamWriter<global::Grpc.Testing.ServerStatus> responseStream, ServerCallContext context);
       Task RunClient(IAsyncStreamReader<global::Grpc.Testing.ClientArgs> requestStream, IServerStreamWriter<global::Grpc.Testing.ClientStatus> responseStream, ServerCallContext context);
+      Task<global::Grpc.Testing.CoreResponse> CoreCount(global::Grpc.Testing.CoreRequest request, ServerCallContext context);
+      Task<global::Grpc.Testing.Void> QuitWorker(global::Grpc.Testing.Void request, ServerCallContext context);
     }
 
     // client stub
@@ -177,6 +204,46 @@ namespace Grpc.Testing {
         var call = CreateCall(__Method_RunClient, options);
         return Calls.AsyncDuplexStreamingCall(call);
       }
+      public global::Grpc.Testing.CoreResponse CoreCount(global::Grpc.Testing.CoreRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      {
+        var call = CreateCall(__Method_CoreCount, new CallOptions(headers, deadline, cancellationToken));
+        return Calls.BlockingUnaryCall(call, request);
+      }
+      public global::Grpc.Testing.CoreResponse CoreCount(global::Grpc.Testing.CoreRequest request, CallOptions options)
+      {
+        var call = CreateCall(__Method_CoreCount, options);
+        return Calls.BlockingUnaryCall(call, request);
+      }
+      public AsyncUnaryCall<global::Grpc.Testing.CoreResponse> CoreCountAsync(global::Grpc.Testing.CoreRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      {
+        var call = CreateCall(__Method_CoreCount, new CallOptions(headers, deadline, cancellationToken));
+        return Calls.AsyncUnaryCall(call, request);
+      }
+      public AsyncUnaryCall<global::Grpc.Testing.CoreResponse> CoreCountAsync(global::Grpc.Testing.CoreRequest request, CallOptions options)
+      {
+        var call = CreateCall(__Method_CoreCount, options);
+        return Calls.AsyncUnaryCall(call, request);
+      }
+      public global::Grpc.Testing.Void QuitWorker(global::Grpc.Testing.Void request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      {
+        var call = CreateCall(__Method_QuitWorker, new CallOptions(headers, deadline, cancellationToken));
+        return Calls.BlockingUnaryCall(call, request);
+      }
+      public global::Grpc.Testing.Void QuitWorker(global::Grpc.Testing.Void request, CallOptions options)
+      {
+        var call = CreateCall(__Method_QuitWorker, options);
+        return Calls.BlockingUnaryCall(call, request);
+      }
+      public AsyncUnaryCall<global::Grpc.Testing.Void> QuitWorkerAsync(global::Grpc.Testing.Void request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      {
+        var call = CreateCall(__Method_QuitWorker, new CallOptions(headers, deadline, cancellationToken));
+        return Calls.AsyncUnaryCall(call, request);
+      }
+      public AsyncUnaryCall<global::Grpc.Testing.Void> QuitWorkerAsync(global::Grpc.Testing.Void request, CallOptions options)
+      {
+        var call = CreateCall(__Method_QuitWorker, options);
+        return Calls.AsyncUnaryCall(call, request);
+      }
     }
 
     // creates service definition that can be registered with a server
@@ -184,7 +251,9 @@ namespace Grpc.Testing {
     {
       return ServerServiceDefinition.CreateBuilder(__ServiceName)
           .AddMethod(__Method_RunServer, serviceImpl.RunServer)
-          .AddMethod(__Method_RunClient, serviceImpl.RunClient).Build();
+          .AddMethod(__Method_RunClient, serviceImpl.RunClient)
+          .AddMethod(__Method_CoreCount, serviceImpl.CoreCount)
+          .AddMethod(__Method_QuitWorker, serviceImpl.QuitWorker).Build();
     }
 
     // creates a new client
diff --git a/src/csharp/Grpc.IntegrationTesting/WorkerServiceImpl.cs b/src/csharp/Grpc.IntegrationTesting/WorkerServiceImpl.cs
index bb2918bf463dc0e527d24b2cfd7766c285957d70..cab299a137357a3b3506a1ff44bfc11402648a40 100644
--- a/src/csharp/Grpc.IntegrationTesting/WorkerServiceImpl.cs
+++ b/src/csharp/Grpc.IntegrationTesting/WorkerServiceImpl.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -47,9 +47,16 @@ namespace Grpc.Testing
     /// </summary>
     public class WorkerServiceImpl : WorkerService.IWorkerService
     {
+        readonly Action stopRequestHandler;
+
+        public WorkerServiceImpl(Action stopRequestHandler)
+        {
+            this.stopRequestHandler = GrpcPreconditions.CheckNotNull(stopRequestHandler);
+        }
+        
         public async Task RunServer(IAsyncStreamReader<ServerArgs> requestStream, IServerStreamWriter<ServerStatus> responseStream, ServerCallContext context)
         {
-            Grpc.Core.Utils.Preconditions.CheckState(await requestStream.MoveNext());
+            GrpcPreconditions.CheckState(await requestStream.MoveNext());
             var serverConfig = requestStream.Current.Setup;
             var runner = ServerRunners.CreateStarted(serverConfig);
 
@@ -73,7 +80,7 @@ namespace Grpc.Testing
 
         public async Task RunClient(IAsyncStreamReader<ClientArgs> requestStream, IServerStreamWriter<ClientStatus> responseStream, ServerCallContext context)
         {
-            Grpc.Core.Utils.Preconditions.CheckState(await requestStream.MoveNext());
+            GrpcPreconditions.CheckState(await requestStream.MoveNext());
             var clientConfig = requestStream.Current.Setup;
             var runner = ClientRunners.CreateStarted(clientConfig);
 
@@ -92,5 +99,16 @@ namespace Grpc.Testing
             }
             await runner.StopAsync();
         }
+
+        public Task<CoreResponse> CoreCount(CoreRequest request, ServerCallContext context)
+        {
+            return Task.FromResult(new CoreResponse { Cores = Environment.ProcessorCount });
+        }
+
+        public Task<Void> QuitWorker(Void request, ServerCallContext context)
+        {
+            stopRequestHandler();
+            return Task.FromResult(new Void());
+        }
     }
 }
diff --git a/src/node/ext/call_credentials.cc b/src/node/ext/call_credentials.cc
index 91acb8625477dbee6b3b81d2a5e7cdcec592b080..98696db23254c66ff3df08a1e5ecbe090e6edd7b 100644
--- a/src/node/ext/call_credentials.cc
+++ b/src/node/ext/call_credentials.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -187,7 +187,8 @@ NAN_METHOD(PluginCallback) {
   shared_ptr<Resources> resources(new Resources);
   grpc_status_code code = static_cast<grpc_status_code>(
       Nan::To<uint32_t>(info[0]).FromJust());
-  char *details = *Utf8String(info[1]);
+  Utf8String details_utf8_str(info[1]);
+  char *details = *details_utf8_str;
   grpc_metadata_array array;
   if (!CreateMetadataArray(Nan::To<Object>(info[2]).ToLocalChecked(),
                            &array, resources)){
diff --git a/src/node/ext/node_grpc.cc b/src/node/ext/node_grpc.cc
index 654c5aed09bcd75b4cfaf8bf7186cc73352a2cec..0c71b2d610d446e2438b3759275c21d76cfc79db 100644
--- a/src/node/ext/node_grpc.cc
+++ b/src/node/ext/node_grpc.cc
@@ -237,7 +237,8 @@ NAN_METHOD(MetadataKeyIsLegal) {
         "headerKeyIsLegal's argument must be a string");
   }
   Local<String> key = Nan::To<String>(info[0]).ToLocalChecked();
-  char *key_str = *Nan::Utf8String(key);
+  Nan::Utf8String key_utf8_str(key);
+  char *key_str = *key_utf8_str;
   info.GetReturnValue().Set(static_cast<bool>(
       grpc_header_key_is_legal(key_str, static_cast<size_t>(key->Length()))));
 }
@@ -248,7 +249,8 @@ NAN_METHOD(MetadataNonbinValueIsLegal) {
         "metadataNonbinValueIsLegal's argument must be a string");
   }
   Local<String> value = Nan::To<String>(info[0]).ToLocalChecked();
-  char *value_str = *Nan::Utf8String(value);
+  Nan::Utf8String value_utf8_str(value);
+  char *value_str = *value_utf8_str;
   info.GetReturnValue().Set(static_cast<bool>(
       grpc_header_nonbin_value_is_legal(
           value_str, static_cast<size_t>(value->Length()))));
@@ -260,7 +262,8 @@ NAN_METHOD(MetadataKeyIsBinary) {
         "metadataKeyIsLegal's argument must be a string");
   }
   Local<String> key = Nan::To<String>(info[0]).ToLocalChecked();
-  char *key_str = *Nan::Utf8String(key);
+  Nan::Utf8String key_utf8_str(key);
+  char *key_str = *key_utf8_str;
   info.GetReturnValue().Set(static_cast<bool>(
       grpc_is_binary_header(key_str, static_cast<size_t>(key->Length()))));
 }
diff --git a/src/node/index.js b/src/node/index.js
index 7eacdc67b1d6ae0b460f8e747ac8f4d879a5aeac..1c197729d776fc352ffbc38b9ff85506bf5f4a13 100644
--- a/src/node/index.js
+++ b/src/node/index.js
@@ -56,17 +56,18 @@ var grpc = require('./src/grpc_extension');
 /**
  * Load a gRPC object from an existing ProtoBuf.Reflect object.
  * @param {ProtoBuf.Reflect.Namespace} value The ProtoBuf object to load.
+ * @param {Object=} options Options to apply to the loaded object
  * @return {Object<string, *>} The resulting gRPC object
  */
-exports.loadObject = function loadObject(value) {
+exports.loadObject = function loadObject(value, options) {
   var result = {};
   if (value.className === 'Namespace') {
     _.each(value.children, function(child) {
-      result[child.name] = loadObject(child);
+      result[child.name] = loadObject(child, options);
     });
     return result;
   } else if (value.className === 'Service') {
-    return client.makeProtobufClientConstructor(value);
+    return client.makeProtobufClientConstructor(value, options);
   } else if (value.className === 'Message' || value.className === 'Enum') {
     return value.build();
   } else {
@@ -77,28 +78,45 @@ exports.loadObject = function loadObject(value) {
 var loadObject = exports.loadObject;
 
 /**
- * Load a gRPC object from a .proto file.
- * @param {string} filename The file to load
+ * Load a gRPC object from a .proto file. The options object can provide the
+ * following options:
+ * - convertFieldsToCamelCase: Loads this file with that option on protobuf.js
+ *   set as specified. See
+ *   https://github.com/dcodeIO/protobuf.js/wiki/Advanced-options for details
+ * - binaryAsBase64: deserialize bytes values as base64 strings instead of
+ *   Buffers. Defaults to false
+ * - longsAsStrings: deserialize long values as strings instead of objects.
+ *   Defaults to true
+ * @param {string|{root: string, file: string}} filename The file to load
  * @param {string=} format The file format to expect. Must be either 'proto' or
  *     'json'. Defaults to 'proto'
+ * @param {Object=} options Options to apply to the loaded file
  * @return {Object<string, *>} The resulting gRPC object
  */
-exports.load = function load(filename, format) {
+exports.load = function load(filename, format, options) {
   if (!format) {
     format = 'proto';
   }
+  var convertFieldsToCamelCaseOriginal = ProtoBuf.convertFieldsToCamelCase;
+  if(options && options.hasOwnProperty('convertFieldsToCamelCase')) {
+    ProtoBuf.convertFieldsToCamelCase = options.convertFieldsToCamelCase;
+  }
   var builder;
-  switch(format) {
-    case 'proto':
-    builder = ProtoBuf.loadProtoFile(filename);
-    break;
-    case 'json':
-    builder = ProtoBuf.loadJsonFile(filename);
-    break;
-    default:
-    throw new Error('Unrecognized format "' + format + '"');
+  try {
+    switch(format) {
+      case 'proto':
+      builder = ProtoBuf.loadProtoFile(filename);
+      break;
+      case 'json':
+      builder = ProtoBuf.loadJsonFile(filename);
+      break;
+      default:
+      throw new Error('Unrecognized format "' + format + '"');
+    }
+  } finally {
+    ProtoBuf.convertFieldsToCamelCase = convertFieldsToCamelCaseOriginal;
   }
-  return loadObject(builder.ns);
+  return loadObject(builder.ns, options);
 };
 
 /**
diff --git a/src/node/src/client.js b/src/node/src/client.js
index b5247a69ee01610313aab95dda1df1dbffa07283..c65dd7365037a00c2f001132788824bf70196890 100644
--- a/src/node/src/client.js
+++ b/src/node/src/client.js
@@ -648,8 +648,8 @@ exports.makeClientConstructor = function(methods, serviceName) {
     var deserialize = attrs.responseDeserialize;
     Client.prototype[name] = requester_makers[method_type](
         attrs.path, serialize, deserialize);
-    Client.prototype[name].serialize = serialize;
-    Client.prototype[name].deserialize = deserialize;
+    // Associate all provided attributes with the method
+    _.assign(Client.prototype[name], attrs);
   });
 
   return Client;
@@ -698,13 +698,16 @@ exports.waitForClientReady = function(client, deadline, callback) {
  * Creates a constructor for clients for the given service
  * @param {ProtoBuf.Reflect.Service} service The service to generate a client
  *     for
+ * @param {Object=} options Options to apply to the client
  * @return {function(string, Object)} New client constructor
  */
-exports.makeProtobufClientConstructor =  function(service) {
-  var method_attrs = common.getProtobufServiceAttrs(service, service.name);
+exports.makeProtobufClientConstructor =  function(service, options) {
+  var method_attrs = common.getProtobufServiceAttrs(service, service.name,
+                                                    options);
   var Client = exports.makeClientConstructor(
       method_attrs, common.fullyQualifiedName(service));
   Client.service = service;
+  Client.service.grpc_options = options;
   return Client;
 };
 
diff --git a/src/node/src/common.js b/src/node/src/common.js
index 2e6c01c4d744a16234796ae07f7beb46da8b4b9b..7705a275fcee23169cc5f5c875d08202e9046813 100644
--- a/src/node/src/common.js
+++ b/src/node/src/common.js
@@ -44,9 +44,20 @@ var _ = require('lodash');
 /**
  * Get a function that deserializes a specific type of protobuf.
  * @param {function()} cls The constructor of the message type to deserialize
+ * @param {bool=} binaryAsBase64 Deserialize bytes fields as base64 strings
+ *     instead of Buffers. Defaults to false
+ * @param {bool=} longsAsStrings Deserialize long values as strings instead of
+ *     objects. Defaults to true
  * @return {function(Buffer):cls} The deserialization function
  */
-exports.deserializeCls = function deserializeCls(cls) {
+exports.deserializeCls = function deserializeCls(cls, binaryAsBase64,
+                                                 longsAsStrings) {
+  if (binaryAsBase64 === undefined || binaryAsBase64 === null) {
+    binaryAsBase64 = false;
+  }
+  if (longsAsStrings === undefined || longsAsStrings === null) {
+    longsAsStrings = true;
+  }
   /**
    * Deserialize a buffer to a message object
    * @param {Buffer} arg_buf The buffer to deserialize
@@ -55,7 +66,7 @@ exports.deserializeCls = function deserializeCls(cls) {
   return function deserialize(arg_buf) {
     // Convert to a native object with binary fields as Buffers (first argument)
     // and longs as strings (second argument)
-    return cls.decode(arg_buf).toRaw(false, true);
+    return cls.decode(arg_buf).toRaw(binaryAsBase64, longsAsStrings);
   };
 };
 
@@ -119,19 +130,30 @@ exports.wrapIgnoreNull = function wrapIgnoreNull(func) {
 /**
  * Return a map from method names to method attributes for the service.
  * @param {ProtoBuf.Reflect.Service} service The service to get attributes for
+ * @param {Object=} options Options to apply to these attributes
  * @return {Object} The attributes map
  */
-exports.getProtobufServiceAttrs = function getProtobufServiceAttrs(service) {
+exports.getProtobufServiceAttrs = function getProtobufServiceAttrs(service,
+                                                                   options) {
   var prefix = '/' + fullyQualifiedName(service) + '/';
+  var binaryAsBase64, longsAsStrings;
+  if (options) {
+    binaryAsBase64 = options.binaryAsBase64;
+    longsAsStrings = options.longsAsStrings;
+  }
   return _.object(_.map(service.children, function(method) {
     return [_.camelCase(method.name), {
       path: prefix + method.name,
       requestStream: method.requestStream,
       responseStream: method.responseStream,
+      requestType: method.resolvedRequestType,
+      responseType: method.resolvedResponseType,
       requestSerialize: serializeCls(method.resolvedRequestType.build()),
-      requestDeserialize: deserializeCls(method.resolvedRequestType.build()),
+      requestDeserialize: deserializeCls(method.resolvedRequestType.build(),
+                                     binaryAsBase64, longsAsStrings),
       responseSerialize: serializeCls(method.resolvedResponseType.build()),
-      responseDeserialize: deserializeCls(method.resolvedResponseType.build())
+      responseDeserialize: deserializeCls(method.resolvedResponseType.build(),
+                                     binaryAsBase64, longsAsStrings)
     }];
   }));
 };
diff --git a/src/node/src/credentials.js b/src/node/src/credentials.js
index 710ab6d879cd36c8e13da6523de5d888919699a2..1d73723cc064501d38fb97ad9cf21710779fce34 100644
--- a/src/node/src/credentials.js
+++ b/src/node/src/credentials.js
@@ -98,6 +98,8 @@ exports.createFromMetadataGenerator = function(metadata_generator) {
         message = error.message;
         if (error.hasOwnProperty('code')) {
           code = error.code;
+        } else {
+          code = grpc.status.UNAUTHENTICATED;
         }
         if (!metadata) {
           metadata = new Metadata();
@@ -116,13 +118,16 @@ exports.createFromMetadataGenerator = function(metadata_generator) {
 exports.createFromGoogleCredential = function(google_credential) {
   return exports.createFromMetadataGenerator(function(auth_context, callback) {
     var service_url = auth_context.service_url;
+    console.log('Service URL:', service_url);
     google_credential.getRequestMetadata(service_url, function(err, header) {
       if (err) {
+        console.log('Auth error:', err);
         callback(err);
         return;
       }
       var metadata = new Metadata();
       metadata.add('authorization', header.Authorization);
+      console.log(header.Authorization);
       callback(null, metadata);
     });
   });
diff --git a/src/node/src/metadata.js b/src/node/src/metadata.js
index 51a9f8a21622d71296a8000efcc6f7eefc772ed1..33d7ea1cf7a82a3dcabbed68187ab5c8292e3f62 100644
--- a/src/node/src/metadata.js
+++ b/src/node/src/metadata.js
@@ -64,7 +64,7 @@ function normalizeKey(key) {
   if (grpc.metadataKeyIsLegal(key)) {
     return key;
   } else {
-    throw new Error('Metadata key contains illegal characters');
+    throw new Error('Metadata key"' + key + '" contains illegal characters');
   }
 }
 
@@ -79,7 +79,8 @@ function validate(key, value) {
           'keys that don\'t end with \'-bin\' must have String values');
     }
     if (!grpc.metadataNonbinValueIsLegal(value)) {
-      throw new Error('Metadata string value contains illegal characters');
+      throw new Error('Metadata string value "' + value +
+                      '" contains illegal characters');
     }
   }
 }
diff --git a/src/node/src/server.js b/src/node/src/server.js
index e5aadcd5658e05652f14c4045ad5faa9abe66af6..0cf7ba34246564ac529e866ba97bea9006c4dc66 100644
--- a/src/node/src/server.js
+++ b/src/node/src/server.js
@@ -737,7 +737,12 @@ Server.prototype.addService = function(service, implementation) {
  *     method implementation for the provided service.
  */
 Server.prototype.addProtoService = function(service, implementation) {
-  this.addService(common.getProtobufServiceAttrs(service), implementation);
+  var options;
+  if (service.grpc_options) {
+    options = service.grpc_options;
+  }
+  this.addService(common.getProtobufServiceAttrs(service, options),
+                  implementation);
 };
 
 /**
diff --git a/src/node/test/common_test.js b/src/node/test/common_test.js
index 08ba429ed7f012672b714d8b1c1b119eb6c0edf3..66a4205f82c79e79cd1dd3682c50a035c14f268c 100644
--- a/src/node/test/common_test.js
+++ b/src/node/test/common_test.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -42,7 +42,7 @@ var ProtoBuf = require('protobufjs');
 var messages_proto = ProtoBuf.loadProtoFile(
     __dirname + '/test_messages.proto').build();
 
-describe('Proto message serialize and deserialize', function() {
+describe('Proto message long int serialize and deserialize', function() {
   var longSerialize = common.serializeCls(messages_proto.LongValues);
   var longDeserialize = common.deserializeCls(messages_proto.LongValues);
   var pos_value = '314159265358979';
@@ -87,4 +87,52 @@ describe('Proto message serialize and deserialize', function() {
     assert.strictEqual(longDeserialize(serialized).sfixed_64.toString(),
                        neg_value);
   });
+  it('should deserialize as a number with the right option set', function() {
+    var longNumDeserialize = common.deserializeCls(messages_proto.LongValues,
+                                                   false, false);
+    var serialized = longSerialize({int_64: pos_value});
+    assert.strictEqual(typeof longDeserialize(serialized).int_64, 'string');
+    /* With the longsAsStrings option disabled, long values are represented as
+     * objects with 3 keys: low, high, and unsigned */
+    assert.strictEqual(typeof longNumDeserialize(serialized).int_64, 'object');
+  });
+});
+describe('Proto message bytes serialize and deserialize', function() {
+  var sequenceSerialize = common.serializeCls(messages_proto.SequenceValues);
+  var sequenceDeserialize = common.deserializeCls(
+      messages_proto.SequenceValues);
+  var sequenceBase64Deserialize = common.deserializeCls(
+      messages_proto.SequenceValues, true);
+  var buffer_val = new Buffer([0x69, 0xb7]);
+  var base64_val = 'abc=';
+  it('should preserve a buffer', function() {
+    var serialized = sequenceSerialize({bytes_field: buffer_val});
+    var deserialized = sequenceDeserialize(serialized);
+    assert.strictEqual(deserialized.bytes_field.compare(buffer_val), 0);
+  });
+  it('should accept base64 encoded strings', function() {
+    var serialized = sequenceSerialize({bytes_field: base64_val});
+    var deserialized = sequenceDeserialize(serialized);
+    assert.strictEqual(deserialized.bytes_field.compare(buffer_val), 0);
+  });
+  it('should output base64 encoded strings with an option set', function() {
+    var serialized = sequenceSerialize({bytes_field: base64_val});
+    var deserialized = sequenceBase64Deserialize(serialized);
+    assert.strictEqual(deserialized.bytes_field, base64_val);
+  });
+  /* The next two tests are specific tests to verify that issue
+   * https://github.com/grpc/grpc/issues/5174 has been fixed. They are skipped
+   * because they will not pass until a protobuf.js release has been published
+   * with a fix for https://github.com/dcodeIO/protobuf.js/issues/390 */
+  it.skip('should serialize a repeated field as packed by default', function() {
+    var expected_serialize = new Buffer([0x12, 0x01, 0x01, 0x0a]);
+    var serialized = sequenceSerialize({repeated_field: [10]});
+    assert.strictEqual(expected_serialize.compare(serialized), 0);
+  });
+  it.skip('should deserialize packed or unpacked repeated', function() {
+    var serialized = new Buffer([0x12, 0x01, 0x01, 0x0a]);
+    assert.doesNotThrow(function() {
+      sequenceDeserialize(serialized);
+    });
+  });
 });
diff --git a/src/node/test/test_messages.proto b/src/node/test/test_messages.proto
index c77a937d3f4e3c91812eb711bfe655358b6260f6..9b8cb875eeb0aeed0fbd498ef7b101d23b15f0b7 100644
--- a/src/node/test/test_messages.proto
+++ b/src/node/test/test_messages.proto
@@ -36,3 +36,8 @@ message LongValues {
   fixed64 fixed_64 = 4;
   sfixed64 sfixed_64 = 5;
 }
+
+message SequenceValues {
+  bytes bytes_field = 1;
+  repeated int32 repeated_field = 2;
+}
diff --git a/src/proto/grpc/lb/v0/load_balancer.options b/src/proto/grpc/lb/v0/load_balancer.options
new file mode 100644
index 0000000000000000000000000000000000000000..6d4528f838a4c819c5b183bac9edb2db67200356
--- /dev/null
+++ b/src/proto/grpc/lb/v0/load_balancer.options
@@ -0,0 +1,6 @@
+grpc.lb.v0.InitialLoadBalanceRequest.name max_size:128
+grpc.lb.v0.InitialLoadBalanceResponse.client_config max_size:64
+grpc.lb.v0.InitialLoadBalanceResponse.load_balancer_delegate max_size:64
+grpc.lb.v0.Server.ip_address max_size:46
+grpc.lb.v0.Server.load_balance_token max_size:64
+load_balancer.proto no_unions:true
diff --git a/src/proto/grpc/lb/v0/load_balancer.proto b/src/proto/grpc/lb/v0/load_balancer.proto
new file mode 100644
index 0000000000000000000000000000000000000000..e88a4f8c4a7eb7e949daeadfc61becd108a41737
--- /dev/null
+++ b/src/proto/grpc/lb/v0/load_balancer.proto
@@ -0,0 +1,144 @@
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+package grpc.lb.v0;
+
+message Duration {
+
+  // Signed seconds of the span of time. Must be from -315,576,000,000
+  // to +315,576,000,000 inclusive.
+  int64 seconds = 1;
+
+  // Signed fractions of a second at nanosecond resolution of the span
+  // of time. Durations less than one second are represented with a 0
+  // `seconds` field and a positive or negative `nanos` field. For durations
+  // of one second or more, a non-zero value for the `nanos` field must be
+  // of the same sign as the `seconds` field. Must be from -999,999,999
+  // to +999,999,999 inclusive.
+  int32 nanos = 2;
+}
+
+service LoadBalancer {
+  // Bidirectional rpc to get a list of servers.
+  rpc BalanceLoad(stream LoadBalanceRequest)
+      returns (stream LoadBalanceResponse);
+}
+
+message LoadBalanceRequest {
+  oneof load_balance_request_type {
+    // This message should be sent on the first request to the load balancer.
+    InitialLoadBalanceRequest initial_request = 1;
+
+    // The client stats should be periodically reported to the load balancer
+    // based on the duration defined in the InitialLoadBalanceResponse.
+    ClientStats client_stats = 2;
+  }
+}
+
+message InitialLoadBalanceRequest {
+  // Name of load balanced service (IE, service.grpc.gslb.google.com)
+  string name = 1;
+}
+
+// Contains client level statistics that are useful to load balancing. Each
+// count should be reset to zero after reporting the stats.
+message ClientStats {
+  // The total number of requests sent by the client since the last report.
+  int64 total_requests = 1;
+
+  // The number of client rpc errors since the last report.
+  int64 client_rpc_errors = 2;
+
+  // The number of dropped requests since the last report.
+  int64 dropped_requests = 3;
+}
+
+message LoadBalanceResponse {
+  oneof load_balance_response_type {
+    // This message should be sent on the first response to the client.
+    InitialLoadBalanceResponse initial_response = 1;
+
+    // Contains the list of servers selected by the load balancer. The client
+    // should send requests to these servers in the specified order.
+    ServerList server_list = 2;
+  }
+}
+
+message InitialLoadBalanceResponse {
+  oneof initial_response_type {
+    // Contains gRPC config options like RPC deadline or flow control.
+    // TODO(yetianx): Change to ClientConfig after it is defined.
+    string client_config = 1;
+
+    // This is an application layer redirect that indicates the client should
+    // use the specified server for load balancing. When this field is set in
+    // the response, the client should open a separate connection to the
+    // load_balancer_delegate and call the BalanceLoad method.
+    string load_balancer_delegate = 2;
+  }
+
+  // This interval defines how often the client should send the client stats
+  // to the load balancer. Stats should only be reported when the duration is
+  // positive.
+  Duration client_stats_report_interval = 3;
+}
+
+message ServerList {
+  // Contains a list of servers selected by the load balancer. The list will
+  // be updated when server resolutions change or as needed to balance load
+  // across more servers. The client should consume the server list in order
+  // unless instructed otherwise via the client_config.
+  repeated Server servers = 1;
+
+  // Indicates the amount of time that the client should consider this server
+  // list as valid. It may be considered stale after waiting this interval of
+  // time after receiving the list. If the interval is not positive, the
+  // client can assume the list is valid until the next list is received.
+  Duration expiration_interval = 3;
+}
+
+message Server {
+  // A resolved address and port for the server. The IP address string may
+  // either be an IPv4 or IPv6 address.
+  string ip_address = 1;
+  int32 port = 2;
+
+  // An opaque token that is passed from the client to the server in metadata.
+  // The server may expect this token to indicate that the request from the
+  // client was load balanced.
+  // TODO(yetianx): Not used right now, and will be used after implementing
+  // load report.
+  bytes load_balance_token = 3;
+
+  // Indicates whether this particular request should be dropped by the client
+  // when this server is chosen from the list.
+  bool drop_request = 4;
+}
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 38b2226e4e5f86027000ee1c5e97294d1ceec029..c020fda2846006d57d0784137f90a571ea070656 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -73,27 +73,6 @@ CORE_SOURCE_FILES = [
   'src/core/support/time_win32.c',
   'src/core/support/tls_pthread.c',
   'src/core/support/wrap_memcpy.c',
-  'src/core/httpcli/httpcli_security_connector.c',
-  'src/core/security/base64.c',
-  'src/core/security/client_auth_filter.c',
-  'src/core/security/credentials.c',
-  'src/core/security/credentials_metadata.c',
-  'src/core/security/credentials_posix.c',
-  'src/core/security/credentials_win32.c',
-  'src/core/security/google_default_credentials.c',
-  'src/core/security/handshake.c',
-  'src/core/security/json_token.c',
-  'src/core/security/jwt_verifier.c',
-  'src/core/security/secure_endpoint.c',
-  'src/core/security/security_connector.c',
-  'src/core/security/security_context.c',
-  'src/core/security/server_auth_filter.c',
-  'src/core/security/server_secure_chttp2.c',
-  'src/core/surface/init_secure.c',
-  'src/core/surface/secure_channel_create.c',
-  'src/core/tsi/fake_transport_security.c',
-  'src/core/tsi/ssl_transport_security.c',
-  'src/core/tsi/transport_security.c',
   'src/core/census/grpc_context.c',
   'src/core/census/grpc_filter.c',
   'src/core/channel/channel_args.c',
@@ -109,6 +88,7 @@ CORE_SOURCE_FILES = [
   'src/core/client_config/connector.c',
   'src/core/client_config/default_initial_connect_string.c',
   'src/core/client_config/initial_connect_string.c',
+  'src/core/client_config/lb_policies/load_balancer_api.c',
   'src/core/client_config/lb_policies/pick_first.c',
   'src/core/client_config/lb_policies/round_robin.c',
   'src/core/client_config/lb_policy.c',
@@ -173,6 +153,7 @@ CORE_SOURCE_FILES = [
   'src/core/json/json_reader.c',
   'src/core/json/json_string.c',
   'src/core/json/json_writer.c',
+  'src/core/proto/grpc/lb/v0/load_balancer.pb.c',
   'src/core/surface/alarm.c',
   'src/core/surface/api_trace.c',
   'src/core/surface/byte_buffer.c',
@@ -222,12 +203,36 @@ CORE_SOURCE_FILES = [
   'src/core/transport/static_metadata.c',
   'src/core/transport/transport.c',
   'src/core/transport/transport_op_string.c',
+  'src/core/httpcli/httpcli_security_connector.c',
+  'src/core/security/base64.c',
+  'src/core/security/client_auth_filter.c',
+  'src/core/security/credentials.c',
+  'src/core/security/credentials_metadata.c',
+  'src/core/security/credentials_posix.c',
+  'src/core/security/credentials_win32.c',
+  'src/core/security/google_default_credentials.c',
+  'src/core/security/handshake.c',
+  'src/core/security/json_token.c',
+  'src/core/security/jwt_verifier.c',
+  'src/core/security/secure_endpoint.c',
+  'src/core/security/security_connector.c',
+  'src/core/security/security_context.c',
+  'src/core/security/server_auth_filter.c',
+  'src/core/security/server_secure_chttp2.c',
+  'src/core/surface/init_secure.c',
+  'src/core/surface/secure_channel_create.c',
+  'src/core/tsi/fake_transport_security.c',
+  'src/core/tsi/ssl_transport_security.c',
+  'src/core/tsi/transport_security.c',
   'src/core/census/context.c',
   'src/core/census/initialize.c',
-  'src/core/census/log.c',
+  'src/core/census/mlog.c',
   'src/core/census/operation.c',
   'src/core/census/placeholders.c',
   'src/core/census/tracing.c',
+  'third_party/nanopb/pb_common.c',
+  'third_party/nanopb/pb_decode.c',
+  'third_party/nanopb/pb_encode.c',
   'src/boringssl/err_data.c',
   'third_party/boringssl/crypto/aes/aes.c',
   'third_party/boringssl/crypto/aes/mode_wrappers.c',
diff --git a/summerofcode/ideas.md b/summerofcode/ideas.md
new file mode 100644
index 0000000000000000000000000000000000000000..c7f368e7cc2f9d66e40069e68136047f8baf859f
--- /dev/null
+++ b/summerofcode/ideas.md
@@ -0,0 +1,52 @@
+# gRPC Summer of Code Project Ideas
+
+Hello students!
+
+We want gRPC to be the universal remote procedure call protocol for all
+computing platforms and paradigms, so while these are our ideas of what we
+think would make good projects for the summer, we're eager to hear your ideas
+and proposals as well.
+[Try us out](https://github.com/grpc/grpc/blob/master/CONTRIBUTING.md) and get
+to know the gRPC code and team!
+
+**Required skills for all projects:** git version control, collaborative
+software development on github.com, and software development in at least one
+of gRPC's ten languages on at least one of Linux, Mac OS X, and Windows.
+
+-------------------------------------
+
+gRPC C Core:
+
+1. Port gRPC to  one of the major BSD platforms ([FreeBSD](https://freebsd.org), [NetBSD](https://netbsd.org), and [OpenBSD](https://openbsd.org)) and create packages for them. Add [kqueue](https://www.freebsd.org/cgi/man.cgi?query=kqueue) support in the process.
+ * **Required skills:** C programming language, BSD operating system.
+ * **Likely mentors:** [Craig Tiller](https://github.com/ctiller), [Nicolas Noble](https://github.com/nicolasnoble).
+1. Fix gRPC C-core's URI parser. The current parser does not qualify as a standard parser according to [RFC3986]( https://tools.ietf.org/html/rfc3986). Write test suites to verify this and make changes necessary to make the URI parser compliant.
+ * **Required skills:** C programming language, HTTP standard compliance.
+ * **Likely mentors:** [Craig Tiller](https://github.com/ctiller).
+1. HPACK compression efficiency evaluation - Figure out how to benchmark gRPC's compression efficiency (both in terms of bytes on the wire and cpu cycles). Implement benchmarks. Potentially extend this to other full-stack gRPC implementations (Java and Go).
+ * **Required skills:** C programming language, software performance benchmarking, potentially Java and Go.
+ * **Likely mentors:** [Craig Tiller](https://github.com/ctiller).
+
+
+gRPC Python:
+
+1. Port gRPC Python to [PyPy](http://pypy.org). Investigate the state of [Cython support](http://docs.cython.org/src/userguide/pypy.html) to do this or potentially explore [cffi](https://cffi.readthedocs.org/en/latest/).
+ * **Required skills:** Python programming language, PyPy Python interpreter.
+ * **Likely mentors:** [Nathaniel Manista](https://github.com/nathanielmanistaatgoogle), [Masood Malekghassemi](https://github.com/soltanmm).
+1. Develop and test Python 3.5 Support for gRPC. Make necessary changes to port gRPC and package it for supported platforms.
+ * **Required skills:** Python programming language, PyPy Python interpreter.
+ * **Likely mentors:** [Nathaniel Manista](https://github.com/nathanielmanistaatgoogle), [Masood Malekghassemi](https://github.com/soltanmm).
+ 
+gRPC Ruby/Java:
+
+1. [jRuby](http://jruby.org) support for gRPC. Develop a jRuby wrapper for gRPC based on grpc-java and ensure that it is API compatible with the existing Ruby implementation and passes all tests.
+ * **Required skills:** Java programming language, Ruby programming language.
+ * **Likely mentors:** [Michael Lumish](https://github.com/murgatroid99), [Eric Anderson](https://github.com/ejona86).
+
+
+gRPC Wire Protocol:
+
+1. Develop a [Wireshark](https://wireshark.org) plugin for the gRPC protocol. Provide documentation and tutorials for this plugin.
+ * **Bonus:** consider set-up and use with mobile clients.
+ * **Required skills:** Wireshark software.
+ * **Likely mentors:** [Nicolas Noble](https://github.com/nicolasnoble).
diff --git a/templates/Makefile.template b/templates/Makefile.template
index 218f492837c7a2608ed848afabb8e3286af5c709..7aa6ad71e26a2e1a18c950f350ddcc20e75d7a65 100644
--- a/templates/Makefile.template
+++ b/templates/Makefile.template
@@ -159,7 +159,7 @@
   else
   ifeq ($(SYSTEM),Darwin)
   ifeq ($(origin AR), default)
-  AR = libtool -o
+  AR = libtool -no_warning_for_no_symbols -o
   endif
   STRIP ?= strip -x
   else
@@ -790,18 +790,22 @@
 
   static_c: pc_c pc_c_unsecure cache.mk pc_c_zookeeper\
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.build == 'all' and lib.language == 'c' and not lib.get('external_deps', None):
    $(LIBDIR)/$(CONFIG)/lib${lib.name}.a\
   % endif
+  % endif
   % endfor
    static_zookeeper_libs
 
 
   static_cxx: pc_cxx pc_cxx_unsecure cache.mk \
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.build == 'all' and lib.language == 'c++':
    $(LIBDIR)/$(CONFIG)/lib${lib.name}.a\
   % endif
+  % endif
   % endfor
 
 
@@ -809,40 +813,50 @@
 
   shared_c: pc_c pc_c_unsecure cache.mk pc_c_zookeeper\
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.build == 'all' and lib.language == 'c' and not lib.get('external_deps', None):
    $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)${lib.name}$(SHARED_VERSION).$(SHARED_EXT)\
   % endif
+  % endif
   % endfor
    shared_zookeeper_libs
 
   shared_cxx: pc_cxx pc_cxx_unsecure cache.mk\
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.build == 'all' and lib.language == 'c++':
    $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)${lib.name}$(SHARED_VERSION).$(SHARED_EXT)\
   % endif
+  % endif
   % endfor
 
 
   shared_csharp: shared_c \
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.build == 'all' and lib.language == 'csharp':
    $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)${lib.name}$(SHARED_VERSION).$(SHARED_EXT)\
   % endif
+  % endif
   % endfor
 
   ifeq ($(HAS_ZOOKEEPER),true)
   static_zookeeper_libs:\
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.build == 'all' and lib.language == 'c' and 'zookeeper' in lib.get('external_deps', []):
    $(LIBDIR)/$(CONFIG)/lib${lib.name}.a\
   % endif
+  % endif
   % endfor
 
   shared_zookeeper_libs:\
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.build == 'all' and lib.language == 'c' and 'zookeeper' in lib.get('external_deps', []):
    $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)${lib.name}$(SHARED_VERSION).$(SHARED_EXT)\
   % endif
+  % endif
   % endfor
 
   else
@@ -861,9 +875,11 @@
 
   privatelibs_c: \
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.build == 'private' and lib.language == 'c' and not lib.get('external_deps', None) and not lib.boringssl:
    $(LIBDIR)/$(CONFIG)/lib${lib.name}.a\
   % endif
+  % endif
   % endfor
 
   pc_c: $(LIBDIR)/$(CONFIG)/pkgconfig/grpc.pc
@@ -882,18 +898,22 @@
 
   privatelibs_cxx: \
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.build == 'private' and lib.language == 'c++' and not lib.get('external_deps', None):
    $(LIBDIR)/$(CONFIG)/lib${lib.name}.a\
   % endif
+  % endif
   % endfor
 
 
   ifeq ($(HAS_ZOOKEEPER),true)
   privatelibs_zookeeper: \
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.build == 'private' and lib.language == 'c++' and zookeeper in lib.get('external_deps', []):
    $(LIBDIR)/$(CONFIG)/lib${lib.name}.a\
   % endif
+  % endif
   % endfor
 
   else
@@ -1044,6 +1064,7 @@
   strip-static_c: static_c
   ifeq ($(CONFIG),opt)
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.language == "c":
   % if lib.build == "all":
   % if not lib.get('external_deps', None):
@@ -1052,9 +1073,11 @@
   % endif
   % endif
   % endif
+  % endif
   % endfor
   ifeq ($(HAS_ZOOKEEPER),true)
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.language == "c":
   % if lib.build == "all":
   % if 'zookeeper' in lib.get('external_deps', []):
@@ -1063,6 +1086,7 @@
   % endif
   % endif
   % endif
+  % endif
   % endfor
   endif
   endif
@@ -1070,18 +1094,21 @@
   strip-static_cxx: static_cxx
   ifeq ($(CONFIG),opt)
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.language == "c++":
   % if lib.build == "all":
   	$(E) "[STRIP]   Stripping lib${lib.name}.a"
   	$(Q) $(STRIP) $(LIBDIR)/$(CONFIG)/lib${lib.name}.a
   % endif
   % endif
+  % endif
   % endfor
   endif
 
   strip-shared_c: shared_c
   ifeq ($(CONFIG),opt)
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.language == "c":
   % if lib.build == "all":
   % if not lib.get('external_deps', None):
@@ -1090,9 +1117,11 @@
   % endif
   % endif
   % endif
+  % endif
   % endfor
   ifeq ($(HAS_ZOOKEEPER),true)
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.language == "c":
   % if lib.build == "all":
   % if 'zookeeper' in lib.get('external_deps', []):
@@ -1101,6 +1130,7 @@
   % endif
   % endif
   % endif
+  % endif
   % endfor
   endif
   endif
@@ -1108,24 +1138,28 @@
   strip-shared_cxx: shared_cxx
   ifeq ($(CONFIG),opt)
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.language == "c++":
   % if lib.build == "all":
   	$(E) "[STRIP]   Stripping $(SHARED_PREFIX)${lib.name}$(SHARED_VERSION).$(SHARED_EXT)"
   	$(Q) $(STRIP) $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)${lib.name}$(SHARED_VERSION).$(SHARED_EXT)
   % endif
   % endif
+  % endif
   % endfor
   endif
 
   strip-shared_csharp: shared_csharp
   ifeq ($(CONFIG),opt)
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.language == "csharp":
   % if lib.build == "all":
   	$(E) "[STRIP]   Stripping $(SHARED_PREFIX)${lib.name}$(SHARED_VERSION).$(SHARED_EXT)"
   	$(Q) $(STRIP) $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)${lib.name}$(SHARED_VERSION).$(SHARED_EXT)
   % endif
   % endif
+  % endif
   % endfor
   endif
 
@@ -1234,6 +1268,7 @@
 
   install-static_c: static_c strip-static_c install-pkg-config_c
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.language == "c":
   % if lib.build == "all":
   % if not lib.get('external_deps', None):
@@ -1243,9 +1278,11 @@
   % endif
   % endif
   % endif
+  % endif
   % endfor
   ifeq ($(HAS_ZOOKEEPER),true)
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.language == "c":
   % if lib.build == "all":
   % if 'zookeeper' in lib.get('external_deps', []):
@@ -1255,11 +1292,13 @@
   % endif
   % endif
   % endif
+  % endif
   % endfor
   endif
 
   install-static_cxx: static_cxx strip-static_cxx install-pkg-config_cxx
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.language == "c++":
   % if lib.build == "all":
   	$(E) "[INSTALL] Installing lib${lib.name}.a"
@@ -1267,10 +1306,12 @@
   	$(Q) $(INSTALL) $(LIBDIR)/$(CONFIG)/lib${lib.name}.a $(prefix)/lib/lib${lib.name}.a
   % endif
   % endif
+  % endif
   % endfor
 
   <%def name="install_shared(lang_filter)">\
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.language == lang_filter:
   % if lib.build == "all":
   % if not lib.get('external_deps', None):
@@ -1286,9 +1327,11 @@
   % endif
   % endif
   % endif
+  % endif
   % endfor
   ifeq ($(HAS_ZOOKEEPER),true)
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   % if lib.language == lang_filter:
   % if lib.build == "all":
   % if 'zookeeper' in lib.get('external_deps', []):
@@ -1304,6 +1347,7 @@
   % endif
   % endif
   % endif
+  % endif
   % endfor
   endif
   ifneq ($(SYSTEM),MINGW32)
@@ -1383,7 +1427,9 @@
   # The various libraries
 
   % for lib in libs:
+  % if 'Makefile' in lib.get('build_system', ['Makefile']):
   ${makelib(lib)}
+  % endif
   % endfor
 
 
@@ -1498,7 +1544,7 @@
   % endif
 
   ifeq ($(SYSTEM),Darwin)
-  	$(Q) ranlib $(LIBDIR)/$(CONFIG)/lib${lib.name}.a
+  	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/lib${lib.name}.a
   endif
 
   <%
diff --git a/templates/config.m4.template b/templates/config.m4.template
new file mode 100644
index 0000000000000000000000000000000000000000..dbc12188dc00cd65525f429f566848b920deb6b8
--- /dev/null
+++ b/templates/config.m4.template
@@ -0,0 +1,44 @@
+%YAML 1.2
+--- |
+  PHP_ARG_ENABLE(grpc, whether to enable grpc support,
+  [  --enable-grpc           Enable grpc support])
+
+  if test "$PHP_GRPC" != "no"; then
+    dnl Write more examples of tests here...
+
+    dnl # --with-grpc -> add include path
+    PHP_ADD_INCLUDE(../../grpc/include)
+    PHP_ADD_INCLUDE(../../grpc/src/php/ext/grpc)
+    PHP_ADD_INCLUDE(../../grpc/third_party/boringssl/include)
+
+    LIBS="-lpthread $LIBS"
+
+    GRPC_SHARED_LIBADD="-lpthread $GRPC_SHARED_LIBADD"
+    PHP_ADD_LIBRARY(pthread)
+
+    PHP_ADD_LIBRARY(dl,,GRPC_SHARED_LIBADD)
+    PHP_ADD_LIBRARY(dl)
+
+    case $host in
+      *darwin*) ;;
+      *)
+        PHP_ADD_LIBRARY(rt,,GRPC_SHARED_LIBADD)
+        PHP_ADD_LIBRARY(rt)
+        ;;
+    esac
+
+    PHP_NEW_EXTENSION(grpc,
+      % for source in php_config_m4.src:
+      ${source} ${"\\"}
+      % endfor
+      % for lib in libs:
+      % if lib.name in php_config_m4.get('deps', []):
+      % for source in lib.src:
+      ${source} ${"\\"}
+      % endfor
+      % endif
+      % endfor
+      , $ext_shared, , -Wall -Werror -std=c11 ${"\\"}
+      -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN ${"\\"}
+      -D_HAS_EXCEPTIONS=0 -DNOMINMAX)
+  fi
diff --git a/templates/package.xml.template b/templates/package.xml.template
new file mode 100644
index 0000000000000000000000000000000000000000..455b002e64a0a4788943c13667391b02696172c9
--- /dev/null
+++ b/templates/package.xml.template
@@ -0,0 +1,159 @@
+%YAML 1.2
+--- |
+  <?xml version="1.0" encoding="UTF-8"?>
+  <package packagerversion="1.9.5" version="2.0" xmlns="http://pear.php.net/dtd/package-2.0" xmlns:tasks="http://pear.php.net/dtd/tasks-1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://pear.php.net/dtd/tasks-1.0 http://pear.php.net/dtd/tasks-1.0.xsd http://pear.php.net/dtd/package-2.0 http://pear.php.net/dtd/package-2.0.xsd">
+   <name>grpc</name>
+   <channel>pecl.php.net</channel>
+   <summary>A high performance, open source, general RPC framework that puts mobile and HTTP/2 first.</summary>
+   <description>Remote Procedure Calls (RPCs) provide a useful abstraction for building distributed applications and services. The libraries in this repository provide a concrete implementation of the gRPC protocol, layered over HTTP/2. These libraries enable communication between clients and servers using any combination of the supported languages.</description>
+   <lead>
+    <name>Stanley Cheung</name>
+    <user>stanleycheung</user>
+    <email>grpc-packages@google.com</email>
+    <active>yes</active>
+   </lead>
+   <%! from time import strftime %><date>${"%Y-%m-%d" | strftime}</date>
+   <time>16:06:07</time>
+   <version>
+    <release>0.8.0</release>
+    <api>0.8.0</api>
+   </version>
+   <stability>
+    <release>beta</release>
+    <api>beta</api>
+   </stability>
+   <license>BSD</license>
+   <notes>
+  - Simplify gRPC PHP installation #4517
+   </notes>
+   <contents>
+    <dir baseinstalldir="/" name="/">
+      <file baseinstalldir="/" name="config.m4" role="src" />
+      <file baseinstalldir="/" name="src/php/ext/grpc/CREDITS" role="src" />
+      <file baseinstalldir="/" name="src/php/ext/grpc/LICENSE" role="src" />
+      <file baseinstalldir="/" name="src/php/ext/grpc/README.md" role="src" />
+      % for source in php_config_m4.src + php_config_m4.headers:
+      <file baseinstalldir="/" name="${source}" role="src" />
+      % endfor
+      % for lib in libs:
+      % if lib.name in php_config_m4.get('deps', []):
+      % for source in lib.get('public_headers', []) + lib.headers + lib.src:
+      <file baseinstalldir="/" name="${source}" role="src" />
+      % endfor
+      % endif
+      % endfor
+    </dir>
+   </contents>
+   <dependencies>
+    <required>
+     <php>
+      <min>5.5.0</min>
+     </php>
+     <pearinstaller>
+      <min>1.4.0</min>
+     </pearinstaller>
+    </required>
+   </dependencies>
+   <providesextension>grpc</providesextension>
+   <extsrcrelease />
+   <changelog>
+    <release>
+     <version>
+      <release>0.5.0</release>
+      <api>0.5.0</api>
+     </version>
+     <stability>
+      <release>alpha</release>
+      <api>alpha</api>
+     </stability>
+     <date>2015-06-16</date>
+     <license>BSD</license>
+     <notes>
+  First alpha release
+     </notes>
+    </release>
+    <release>
+     <version>
+      <release>0.5.1</release>
+      <api>0.5.1</api>
+     </version>
+     <stability>
+      <release>alpha</release>
+      <api>alpha</api>
+     </stability>
+     <date>2015-07-09</date>
+     <license>BSD</license>
+     <notes>
+  Update to wrap gRPC C Core version 0.10.0
+     </notes>
+    </release>
+    <release>
+     <version>
+      <release>0.6.0</release>
+      <api>0.6.0</api>
+     </version>
+     <stability>
+      <release>beta</release>
+      <api>beta</api>
+     </stability>
+     <date>2015-09-24</date>
+     <license>BSD</license>
+     <notes>
+  - support per message compression disable
+  - expose per-call host override option
+  - expose connectivity API
+  - expose channel target and call peer
+  - add user-agent
+  - update to wrap gRPC C core library beta version 0.11.0
+     </notes>
+    </release>
+    <release>
+     <version>
+      <release>0.6.1</release>
+      <api>0.6.0</api>
+     </version>
+     <stability>
+      <release>beta</release>
+      <api>beta</api>
+     </stability>
+     <date>2015-10-21</date>
+     <license>BSD</license>
+     <notes>
+  - fixed undefined constant fatal error when run with apache/nginx #2275
+     </notes>
+    </release>
+    <release>
+     <version>
+      <release>0.7.0</release>
+      <api>0.7.0</api>
+     </version>
+     <stability>
+      <release>beta</release>
+      <api>beta</api>
+     </stability>
+     <date>2016-01-13</date>
+     <license>BSD</license>
+     <notes>
+  - Breaking change to Credentials class (removed) #3765
+  - Replaced by ChannelCredentials and CallCredentials class #3765
+  - New plugin based metadata auth API #4394
+  - Explicit ChannelCredentials::createInsecure() call
+     </notes>
+    </release>
+    <release>
+     <version>
+      <release>0.8.0</release>
+      <api>0.8.0</api>
+     </version>
+     <stability>
+      <release>beta</release>
+      <api>beta</api>
+     </stability>
+     <date>${"%Y-%m-%d" | strftime}</date>
+     <license>BSD</license>
+     <notes>
+  - Simplify gRPC PHP installation #4517
+     </notes>
+    </release>
+   </changelog>
+  </package>
diff --git a/templates/tools/dockerfile/apt_get_basic.include b/templates/tools/dockerfile/apt_get_basic.include
index 9237e7dacef6bf786c53de2650e1a753c11b2584..547ce01a300902e06717f09be302a23e86f82cfd 100644
--- a/templates/tools/dockerfile/apt_get_basic.include
+++ b/templates/tools/dockerfile/apt_get_basic.include
@@ -1,3 +1,4 @@
+<%page args="skip_golang=False"/>\
 # Install Git and basic packages.
 RUN apt-get update && apt-get install -y ${'\\'}
   autoconf ${'\\'}
@@ -9,7 +10,9 @@ RUN apt-get update && apt-get install -y ${'\\'}
   gcc ${'\\'}
   gcc-multilib ${'\\'}
   git ${'\\'}
+% if not skip_golang:
   golang ${'\\'}
+% endif
   gyp ${'\\'}
   lcov ${'\\'}
   libc6 ${'\\'}
diff --git a/templates/tools/dockerfile/run_tests_addons.include b/templates/tools/dockerfile/run_tests_addons.include
index 27ac67f5d8feeec3023090c99d06dd7c5870c5a7..30d22be2980462f8f281f9ce011eae0223da0c28 100644
--- a/templates/tools/dockerfile/run_tests_addons.include
+++ b/templates/tools/dockerfile/run_tests_addons.include
@@ -1,7 +1,10 @@
+<%page args="skip_zookeeper=False"/>\
 <%include file="ccache_setup.include"/>
+% if not skip_zookeeper:
 #======================
 # Zookeeper dependencies
 # TODO(jtattermusch): is zookeeper still needed?
 RUN apt-get install -y libzookeeper-mt-dev
+% endif
 
 RUN mkdir /var/local/jenkins
diff --git a/templates/tools/dockerfile/test/cxx_squeeze_x64/Dockerfile.template b/templates/tools/dockerfile/test/cxx_squeeze_x64/Dockerfile.template
new file mode 100644
index 0000000000000000000000000000000000000000..294ae00b4c7ad2eb33713fc73325d54a0e2d82a6
--- /dev/null
+++ b/templates/tools/dockerfile/test/cxx_squeeze_x64/Dockerfile.template
@@ -0,0 +1,45 @@
+%YAML 1.2
+--- |
+  # Copyright 2015-2016, Google Inc.
+  # All rights reserved.
+  #
+  # Redistribution and use in source and binary forms, with or without
+  # modification, are permitted provided that the following conditions are
+  # met:
+  #
+  #     * Redistributions of source code must retain the above copyright
+  # notice, this list of conditions and the following disclaimer.
+  #     * Redistributions in binary form must reproduce the above
+  # copyright notice, this list of conditions and the following disclaimer
+  # in the documentation and/or other materials provided with the
+  # distribution.
+  #     * Neither the name of Google Inc. nor the names of its
+  # contributors may be used to endorse or promote products derived from
+  # this software without specific prior written permission.
+  #
+  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+  # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+  # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+  # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+  # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+  # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+  # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  
+  FROM debian:squeeze
+  
+  <%include file="../../apt_get_basic.include" args="skip_golang=True"/>
+  
+  # libgflags-dev is not available on squeezy
+  RUN apt-get update && apt-get -y install libgtest-dev libc++-dev clang && apt-get clean
+  
+  RUN apt-get update && apt-get -y install python-pip && apt-get clean
+  RUN pip install argparse
+  
+  <%include file="../../run_tests_addons.include" args="skip_zookeeper=True"/>
+  # Define the default command.
+  CMD ["bash"]
+  
\ No newline at end of file
diff --git a/templates/tools/dockerfile/test/cxx_ubuntu1604_x64/Dockerfile.template b/templates/tools/dockerfile/test/cxx_ubuntu1604_x64/Dockerfile.template
new file mode 100644
index 0000000000000000000000000000000000000000..6b302748925f2133c35744194d40478e7029ff15
--- /dev/null
+++ b/templates/tools/dockerfile/test/cxx_ubuntu1604_x64/Dockerfile.template
@@ -0,0 +1,39 @@
+%YAML 1.2
+--- |
+  # Copyright 2015-2016, Google Inc.
+  # All rights reserved.
+  #
+  # Redistribution and use in source and binary forms, with or without
+  # modification, are permitted provided that the following conditions are
+  # met:
+  #
+  #     * Redistributions of source code must retain the above copyright
+  # notice, this list of conditions and the following disclaimer.
+  #     * Redistributions in binary form must reproduce the above
+  # copyright notice, this list of conditions and the following disclaimer
+  # in the documentation and/or other materials provided with the
+  # distribution.
+  #     * Neither the name of Google Inc. nor the names of its
+  # contributors may be used to endorse or promote products derived from
+  # this software without specific prior written permission.
+  #
+  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+  # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+  # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+  # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+  # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+  # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+  # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  
+  FROM ubuntu:16.04
+  
+  <%include file="../../apt_get_basic.include"/>
+  <%include file="../../cxx_deps.include"/>
+  <%include file="../../run_tests_addons.include"/>
+  # Define the default command.
+  CMD ["bash"]
+  
\ No newline at end of file
diff --git a/templates/tools/run_tests/sources_and_headers.json.template b/templates/tools/run_tests/sources_and_headers.json.template
index 04802772af50d362554c6f1426aed04515506411..78363ff1fae66e554be103f9721952f5a4454ee8 100644
--- a/templates/tools/run_tests/sources_and_headers.json.template
+++ b/templates/tools/run_tests/sources_and_headers.json.template
@@ -12,20 +12,27 @@
   			out.extend(fmt % name for fmt in ['%s.grpc.pb.h', '%s.pb.h'])
   	return out
   
-  def no_protos(src):
+  def no_protos_filter(src):
+  	return os.path.splitext(src)[1] != '.proto'
+
+  def no_third_party_filter(src):
+  	return not src.startswith('third_party/')
+  
+  def filter_srcs(srcs, filters):
   	out = []
-  	for f in src:
-  		if os.path.splitext(f)[1] != '.proto':
-  			out.append(f)
+  	for s in srcs:
+  		filter_passes = (f(s) for f in filters)
+  		if all(filter_passes):
+  			out.append(s)
   	return out
   %>
   
   ${json.dumps([{"name": tgt.name,
                  "language": tgt.language,
                  "src": sorted(
-                     no_protos(tgt.src) + 
-                     tgt.get('public_headers', []) + 
-                     tgt.get('headers', [])),
+                     filter_srcs(tgt.src, (no_protos_filter, no_third_party_filter)) + 
+                     filter_srcs(tgt.get('public_headers', []), (no_protos_filter, no_third_party_filter)) + 
+                     filter_srcs(tgt.get('headers', []), (no_third_party_filter,))),
                  "headers": sorted(
                      tgt.get('public_headers', []) + 
                      tgt.get('headers', []) + 
diff --git a/templates/vsprojects/protoc.props.template b/templates/vsprojects/protoc.props.template
index a869005daec4637d86cd2824d7dcd470e7e8e013..ced6028a4be1338517536ebe2ee56e94db08185a 100644
--- a/templates/vsprojects/protoc.props.template
+++ b/templates/vsprojects/protoc.props.template
@@ -4,6 +4,9 @@
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup />
   <ItemDefinitionGroup>
+    <ClCompile>
+      <DisableSpecificWarnings>4244;4267;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
     <Link>
       <AdditionalDependencies>libprotoc.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <AdditionalLibraryDirectories>$(SolutionDir)\..\third_party\protobuf\cmake\$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
diff --git a/templates/vsprojects/vcxproj.filters_defs.include b/templates/vsprojects/vcxproj.filters_defs.include
index 7e2fbac147bf931813ec5bbe6fd4e1dbe37bcd28..e7df8db76378c05dff6a34bfb7cc0387f591d6b5 100644
--- a/templates/vsprojects/vcxproj.filters_defs.include
+++ b/templates/vsprojects/vcxproj.filters_defs.include
@@ -23,6 +23,11 @@
     % endfor
   </ItemGroup>
   % endif
+  % if project.get('dll_def', None):
+  <ItemGroup>
+    <None Include="${get_repo_root(project)}\${to_windows_path(project.dll_def)}" />
+  </ItemGroup>
+  % endif
   % if project.get('public_headers',[]):
   <ItemGroup>
     % for public_header in project.public_headers:
diff --git a/templates/vsprojects/vcxproj_defs.include b/templates/vsprojects/vcxproj_defs.include
index b57c27f76aa458304d22834a99ca18ab81c8996b..e598f1319b845ac45b9df429d1b9d3208761f93c 100644
--- a/templates/vsprojects/vcxproj_defs.include
+++ b/templates/vsprojects/vcxproj_defs.include
@@ -2,6 +2,9 @@
 <%def name="to_windows_path(path)">${path.replace('/','\\')}</%def>\
 <%def name="get_subsystem(is_library)">${'Windows' if is_library else 'Console'}</%def>\
 <%def name="item_definition_group(project, target, debug, dll, _64bit)">\
+<%
+  repo_root = '$(SolutionDir)\..'
+%>\
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='${'%s%s|%s' % ('Debug' if debug else 'Release', '-DLL' if dll else '', 'x64' if _64bit else 'Win32')}'">
     <ClCompile>
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
@@ -23,6 +26,12 @@
       <SubSystem>${get_subsystem(project.is_library)}</SubSystem>
       <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
       <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+% if project.get("noentry", False):
+      <NoEntryPoint>true</NoEntryPoint>
+% endif
+% if project.get("dll_def", None):
+      <ModuleDefinitionFile>${repo_root}\${to_windows_path(project.dll_def)}</ModuleDefinitionFile>
+% endif
 % if not debug:
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
@@ -194,6 +203,11 @@ ${gen_package_props(packages, repo_root)}\
     % endfor
   </ItemGroup>
   % endif
+  % if project.get('dll_def', None):
+  <ItemGroup>
+    <None Include="${repo_root}\${to_windows_path(project.dll_def)}" />
+  </ItemGroup>
+  % endif
   % if project.get('src',[]):
   <ItemGroup>
     % for src_name in project.src:
diff --git a/test/core/census/log_test.c b/test/core/census/mlog_test.c
similarity index 99%
rename from test/core/census/log_test.c
rename to test/core/census/mlog_test.c
index b68ca115045b94c6c8951cb354107a22023a6121..5b6c5946ab5799e37b476fb26c8b5b2e10dfaee7 100644
--- a/test/core/census/log_test.c
+++ b/test/core/census/mlog_test.c
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/census/log.h"
+#include "src/core/census/mlog.h"
 #include <grpc/support/cpu.h>
 #include <grpc/support/log.h>
 #include <grpc/support/port_platform.h>
diff --git a/test/core/util/port_windows.c b/test/core/util/port_windows.c
index 85d7c0ce07764f9670c0943dd11d7ef70fa3db7a..b5bd0168ad2808581257dae898ce988875826090 100644
--- a/test/core/util/port_windows.c
+++ b/test/core/util/port_windows.c
@@ -180,7 +180,7 @@ static int pick_port_using_server(char *server) {
                    &pr);
   gpr_mu_lock(GRPC_POLLSET_MU(&pr.pollset));
   while (pr.port == -1) {
-    grpc_pollset_worker worker;
+    grpc_pollset_worker *worker = NULL;
     grpc_pollset_work(&exec_ctx, &pr.pollset, &worker,
                       gpr_now(GPR_CLOCK_MONOTONIC),
                       GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1));
diff --git a/test/cpp/common/alarm_cpp_test.cc b/test/cpp/common/alarm_cpp_test.cc
index 4745ef14ec7893765a137d13795331b11f6f27f8..5d7344046ce564df72fd0c323ac181fb21796ca3 100644
--- a/test/cpp/common/alarm_cpp_test.cc
+++ b/test/cpp/common/alarm_cpp_test.cc
@@ -55,6 +55,36 @@ TEST(AlarmTest, RegularExpiry) {
   EXPECT_EQ(junk, output_tag);
 }
 
+TEST(AlarmTest, ZeroExpiry) {
+  CompletionQueue cq;
+  void* junk = reinterpret_cast<void*>(1618033);
+  Alarm alarm(&cq, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(0), junk);
+
+  void* output_tag;
+  bool ok;
+  const CompletionQueue::NextStatus status = cq.AsyncNext(
+      (void**)&output_tag, &ok, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(0));
+
+  EXPECT_EQ(status, CompletionQueue::GOT_EVENT);
+  EXPECT_TRUE(ok);
+  EXPECT_EQ(junk, output_tag);
+}
+
+TEST(AlarmTest, NegativeExpiry) {
+  CompletionQueue cq;
+  void* junk = reinterpret_cast<void*>(1618033);
+  Alarm alarm(&cq, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(-1), junk);
+
+  void* output_tag;
+  bool ok;
+  const CompletionQueue::NextStatus status = cq.AsyncNext(
+      (void**)&output_tag, &ok, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(0));
+
+  EXPECT_EQ(status, CompletionQueue::GOT_EVENT);
+  EXPECT_TRUE(ok);
+  EXPECT_EQ(junk, output_tag);
+}
+
 TEST(AlarmTest, Cancellation) {
   CompletionQueue cq;
   void* junk = reinterpret_cast<void*>(1618033);
diff --git a/test/cpp/end2end/async_end2end_test.cc b/test/cpp/end2end/async_end2end_test.cc
index a194c615cdfd1965623371d1627abc8c4d5af52f..9ca3bf98f85c470abda4ef0482c0e16acac6922c 100644
--- a/test/cpp/end2end/async_end2end_test.cc
+++ b/test/cpp/end2end/async_end2end_test.cc
@@ -43,6 +43,7 @@
 #include <grpc/grpc.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
+#include <grpc/support/tls.h>
 #include <gtest/gtest.h>
 
 #include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
@@ -59,6 +60,8 @@ using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
 using std::chrono::system_clock;
 
+GPR_TLS_DECL(g_is_async_end2end_test);
+
 namespace grpc {
 namespace testing {
 
@@ -67,9 +70,11 @@ namespace {
 void* tag(int i) { return (void*)(intptr_t)i; }
 
 #ifdef GPR_POSIX_SOCKET
-static int assert_non_blocking_poll(struct pollfd* pfds, nfds_t nfds,
-                                    int timeout) {
-  GPR_ASSERT(timeout == 0);
+static int maybe_assert_non_blocking_poll(struct pollfd* pfds, nfds_t nfds,
+                                          int timeout) {
+  if (gpr_tls_get(&g_is_async_end2end_test)) {
+    GPR_ASSERT(timeout == 0);
+  }
   return poll(pfds, nfds, timeout);
 }
 
@@ -86,21 +91,21 @@ class PollOverride {
   grpc_poll_function_type prev_;
 };
 
-class PollingCheckRegion : public PollOverride {
+class PollingOverrider : public PollOverride {
  public:
-  explicit PollingCheckRegion(bool allow_blocking)
-      : PollOverride(allow_blocking ? poll : assert_non_blocking_poll) {}
+  explicit PollingOverrider(bool allow_blocking)
+      : PollOverride(allow_blocking ? poll : maybe_assert_non_blocking_poll) {}
 };
 #else
-class PollingCheckRegion {
+class PollingOverrider {
  public:
-  explicit PollingCheckRegion(bool allow_blocking) {}
+  explicit PollingOverrider(bool allow_blocking) {}
 };
 #endif
 
-class Verifier : public PollingCheckRegion {
+class Verifier {
  public:
-  explicit Verifier(bool spin) : PollingCheckRegion(!spin), spin_(spin) {}
+  explicit Verifier(bool spin) : spin_(spin) {}
   Verifier& Expect(int i, bool expect_ok) {
     expectations_[tag(i)] = expect_ok;
     return *this;
@@ -183,6 +188,8 @@ class AsyncEnd2endTest : public ::testing::TestWithParam<bool> {
   AsyncEnd2endTest() {}
 
   void SetUp() GRPC_OVERRIDE {
+    poll_overrider_.reset(new PollingOverrider(!GetParam()));
+
     int port = grpc_pick_unused_port_or_die();
     server_address_ << "localhost:" << port;
 
@@ -193,6 +200,8 @@ class AsyncEnd2endTest : public ::testing::TestWithParam<bool> {
     builder.RegisterService(&service_);
     cq_ = builder.AddCompletionQueue();
     server_ = builder.BuildAndStart();
+
+    gpr_tls_set(&g_is_async_end2end_test, 1);
   }
 
   void TearDown() GRPC_OVERRIDE {
@@ -202,6 +211,8 @@ class AsyncEnd2endTest : public ::testing::TestWithParam<bool> {
     cq_->Shutdown();
     while (cq_->Next(&ignored_tag, &ignored_ok))
       ;
+    poll_overrider_.reset();
+    gpr_tls_set(&g_is_async_end2end_test, 0);
   }
 
   void ResetStub() {
@@ -249,6 +260,8 @@ class AsyncEnd2endTest : public ::testing::TestWithParam<bool> {
   std::unique_ptr<Server> server_;
   grpc::testing::EchoTestService::AsyncService service_;
   std::ostringstream server_address_;
+
+  std::unique_ptr<PollingOverrider> poll_overrider_;
 };
 
 TEST_P(AsyncEnd2endTest, SimpleRpc) {
@@ -976,6 +989,10 @@ class AsyncEnd2endServerTryCancelTest : public AsyncEnd2endTest {
 
     if (server_try_cancel == CANCEL_AFTER_PROCESSING) {
       ServerTryCancel(&srv_ctx);
+
+      // Client reads may fail bacause it is notified that the stream is
+      // cancelled.
+      ignore_cq_result = true;
     }
 
     // Client attemts to read the three messages from the server
@@ -1087,7 +1104,7 @@ class AsyncEnd2endServerTryCancelTest : public AsyncEnd2endTest {
     Verifier(GetParam()).Expect(7, true).Verify(cq_.get());
 
     // This is expected to fail in all cases i.e for all values of
-    // server_try_cancel. This is becasue at this point, either there are no
+    // server_try_cancel. This is because at this point, either there are no
     // more msgs from the client (because client called WritesDone) or the RPC
     // is cancelled on the server
     srv_stream.Read(&recv_request, tag(8));
@@ -1164,6 +1181,9 @@ INSTANTIATE_TEST_CASE_P(AsyncEnd2endServerTryCancel,
 
 int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
+  gpr_tls_init(&g_is_async_end2end_test);
   ::testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
+  int ret = RUN_ALL_TESTS();
+  gpr_tls_destroy(&g_is_async_end2end_test);
+  return ret;
 }
diff --git a/test/cpp/end2end/end2end_test.cc b/test/cpp/end2end/end2end_test.cc
index c8523847ab2cd94034bade62489a76537372d6ab..ce8e4d2a109762ac28c70135bfdd4200debda87f 100644
--- a/test/cpp/end2end/end2end_test.cc
+++ b/test/cpp/end2end/end2end_test.cc
@@ -51,11 +51,11 @@
 #include "src/core/security/credentials.h"
 #include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
-#include "test/core/end2end/data/ssl_test_data.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 #include "test/cpp/end2end/test_service_impl.h"
 #include "test/cpp/util/string_ref_helper.h"
+#include "test/cpp/util/test_credentials_provider.h"
 
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
@@ -191,12 +191,14 @@ class TestServiceImplDupPkg
 
 class TestScenario {
  public:
-  TestScenario(bool proxy, bool tls) : use_proxy(proxy), use_tls(tls) {}
+  TestScenario(bool proxy, const grpc::string& creds_type)
+      : use_proxy(proxy), credentials_type(creds_type) {}
   void Log() const {
-    gpr_log(GPR_INFO, "Scenario: proxy %d, tls %d", use_proxy, use_tls);
+    gpr_log(GPR_INFO, "Scenario: proxy %d, credentials %s", use_proxy,
+            credentials_type.c_str());
   }
   bool use_proxy;
-  bool use_tls;
+  const grpc::string credentials_type;
 };
 
 class End2endTest : public ::testing::TestWithParam<TestScenario> {
@@ -220,14 +222,8 @@ class End2endTest : public ::testing::TestWithParam<TestScenario> {
     server_address_ << "127.0.0.1:" << port;
     // Setup server
     ServerBuilder builder;
-    auto server_creds = InsecureServerCredentials();
-    if (GetParam().use_tls) {
-      SslServerCredentialsOptions::PemKeyCertPair pkcp = {test_server1_key,
-                                                          test_server1_cert};
-      SslServerCredentialsOptions ssl_opts;
-      ssl_opts.pem_root_certs = "";
-      ssl_opts.pem_key_cert_pairs.push_back(pkcp);
-      server_creds = SslServerCredentials(ssl_opts);
+    auto server_creds = GetServerCredentials(GetParam().credentials_type);
+    if (GetParam().credentials_type != kInsecureCredentialsType) {
       server_creds->SetAuthMetadataProcessor(processor);
     }
     builder.AddListeningPort(server_address_.str(), server_creds);
@@ -246,12 +242,8 @@ class End2endTest : public ::testing::TestWithParam<TestScenario> {
     }
     EXPECT_TRUE(is_server_started_);
     ChannelArguments args;
-    auto channel_creds = InsecureChannelCredentials();
-    if (GetParam().use_tls) {
-      SslCredentialsOptions ssl_opts = {test_root_cert, "", ""};
-      args.SetSslTargetNameOverride("foo.test.google.fr");
-      channel_creds = SslCredentials(ssl_opts);
-    }
+    auto channel_creds =
+        GetChannelCredentials(GetParam().credentials_type, &args);
     if (!user_agent_prefix_.empty()) {
       args.SetUserAgentPrefix(user_agent_prefix_);
     }
@@ -941,7 +933,7 @@ TEST_P(End2endTest, ChannelState) {
 
 // Takes 10s.
 TEST_P(End2endTest, ChannelStateTimeout) {
-  if (GetParam().use_tls) {
+  if (GetParam().credentials_type != kInsecureCredentialsType) {
     return;
   }
   int port = grpc_pick_unused_port_or_die();
@@ -1150,7 +1142,7 @@ class SecureEnd2endTest : public End2endTest {
  protected:
   SecureEnd2endTest() {
     GPR_ASSERT(!GetParam().use_proxy);
-    GPR_ASSERT(GetParam().use_tls);
+    GPR_ASSERT(GetParam().credentials_type != kInsecureCredentialsType);
   }
 };
 
@@ -1373,21 +1365,42 @@ TEST_P(SecureEnd2endTest, ClientAuthContext) {
   EXPECT_EQ("*.test.youtube.com", ToString(auth_ctx->GetPeerIdentity()[2]));
 }
 
+std::vector<TestScenario> CreateTestScenarios(bool use_proxy,
+                                              bool test_insecure,
+                                              bool test_secure) {
+  std::vector<TestScenario> scenarios;
+  std::vector<grpc::string> credentials_types;
+  if (test_secure) {
+    credentials_types = GetSecureCredentialsTypeList();
+  }
+  if (test_insecure) {
+    credentials_types.push_back(kInsecureCredentialsType);
+  }
+  for (auto it = credentials_types.begin(); it != credentials_types.end();
+       ++it) {
+    scenarios.push_back(TestScenario(false, *it));
+    if (use_proxy) {
+      scenarios.push_back(TestScenario(true, *it));
+    }
+  }
+  return scenarios;
+}
+
 INSTANTIATE_TEST_CASE_P(End2end, End2endTest,
-                        ::testing::Values(TestScenario(false, false),
-                                          TestScenario(false, true)));
+                        ::testing::ValuesIn(CreateTestScenarios(false, true,
+                                                                true)));
 
 INSTANTIATE_TEST_CASE_P(End2endServerTryCancel, End2endServerTryCancelTest,
-                        ::testing::Values(TestScenario(false, false)));
+                        ::testing::ValuesIn(CreateTestScenarios(false, true,
+                                                                false)));
 
 INSTANTIATE_TEST_CASE_P(ProxyEnd2end, ProxyEnd2endTest,
-                        ::testing::Values(TestScenario(false, false),
-                                          TestScenario(false, true),
-                                          TestScenario(true, false),
-                                          TestScenario(true, true)));
+                        ::testing::ValuesIn(CreateTestScenarios(true, true,
+                                                                true)));
 
 INSTANTIATE_TEST_CASE_P(SecureEnd2end, SecureEnd2endTest,
-                        ::testing::Values(TestScenario(false, true)));
+                        ::testing::ValuesIn(CreateTestScenarios(false, false,
+                                                                true)));
 
 }  // namespace
 }  // namespace testing
diff --git a/test/cpp/grpclb/grpclb_api_test.cc b/test/cpp/grpclb/grpclb_api_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..bd4885fb4cd3659e2e0d85d6b263eb767f0ece6c
--- /dev/null
+++ b/test/cpp/grpclb/grpclb_api_test.cc
@@ -0,0 +1,133 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <gtest/gtest.h>
+#include <string>
+
+#include "src/core/client_config/lb_policies/load_balancer_api.h"
+#include "src/proto/grpc/lb/v0/load_balancer.pb.h"  // C++ version
+
+namespace grpc {
+namespace {
+
+using grpc::lb::v0::LoadBalanceRequest;
+using grpc::lb::v0::LoadBalanceResponse;
+
+class GrpclbTest : public ::testing::Test {};
+
+TEST_F(GrpclbTest, CreateRequest) {
+  const std::string service_name = "AServiceName";
+  LoadBalanceRequest request;
+  grpc_grpclb_request* c_req = grpc_grpclb_request_create(service_name.c_str());
+  gpr_slice slice = grpc_grpclb_request_encode(c_req);
+  const int num_bytes_written = GPR_SLICE_LENGTH(slice);
+  EXPECT_GT(num_bytes_written, 0);
+  request.ParseFromArray(GPR_SLICE_START_PTR(slice), num_bytes_written);
+  EXPECT_EQ(request.initial_request().name(), service_name);
+  gpr_slice_unref(slice);
+  grpc_grpclb_request_destroy(c_req);
+}
+
+TEST_F(GrpclbTest, ParseResponse) {
+  LoadBalanceResponse response;
+  const std::string client_config_str = "I'm a client config";
+  auto* initial_response = response.mutable_initial_response();
+  initial_response->set_client_config(client_config_str);
+  auto* client_stats_report_interval =
+      initial_response->mutable_client_stats_report_interval();
+  client_stats_report_interval->set_seconds(123);
+  client_stats_report_interval->set_nanos(456);
+
+  const std::string encoded_response = response.SerializeAsString();
+  gpr_slice encoded_slice =
+      gpr_slice_from_copied_string(encoded_response.c_str());
+  grpc_grpclb_response* c_response = grpc_grpclb_response_parse(encoded_slice);
+  EXPECT_TRUE(c_response->has_initial_response);
+  EXPECT_TRUE(c_response->initial_response.has_client_config);
+  EXPECT_FALSE(c_response->initial_response.has_load_balancer_delegate);
+  EXPECT_TRUE(strcmp(c_response->initial_response.client_config,
+                     client_config_str.c_str()) == 0);
+  EXPECT_EQ(c_response->initial_response.client_stats_report_interval.seconds,
+            123);
+  EXPECT_EQ(c_response->initial_response.client_stats_report_interval.nanos,
+            456);
+  gpr_slice_unref(encoded_slice);
+  grpc_grpclb_response_destroy(c_response);
+}
+
+TEST_F(GrpclbTest, ParseResponseServerList) {
+  LoadBalanceResponse response;
+  auto* serverlist = response.mutable_server_list();
+  auto* server = serverlist->add_servers();
+  server->set_ip_address("127.0.0.1");
+  server->set_port(12345);
+  server->set_drop_request(true);
+  server = response.mutable_server_list()->add_servers();
+  server->set_ip_address("10.0.0.1");
+  server->set_port(54321);
+  server->set_drop_request(false);
+  auto* expiration_interval = serverlist->mutable_expiration_interval();
+  expiration_interval->set_seconds(888);
+  expiration_interval->set_nanos(999);
+
+  const std::string encoded_response = response.SerializeAsString();
+  gpr_slice encoded_slice =
+      gpr_slice_from_copied_string(encoded_response.c_str());
+  grpc_grpclb_serverlist* c_serverlist =
+      grpc_grpclb_response_parse_serverlist(encoded_slice);
+  ASSERT_EQ(c_serverlist->num_servers, 2ul);
+  EXPECT_TRUE(c_serverlist->servers[0]->has_ip_address);
+  EXPECT_TRUE(strcmp(c_serverlist->servers[0]->ip_address, "127.0.0.1") == 0);
+  EXPECT_EQ(c_serverlist->servers[0]->port, 12345);
+  EXPECT_TRUE(c_serverlist->servers[0]->drop_request);
+  EXPECT_TRUE(c_serverlist->servers[1]->has_ip_address);
+  EXPECT_TRUE(strcmp(c_serverlist->servers[1]->ip_address, "10.0.0.1") == 0);
+  EXPECT_EQ(c_serverlist->servers[1]->port, 54321);
+  EXPECT_FALSE(c_serverlist->servers[1]->drop_request);
+
+  EXPECT_TRUE(c_serverlist->expiration_interval.has_seconds);
+  EXPECT_EQ(c_serverlist->expiration_interval.seconds, 888);
+  EXPECT_TRUE(c_serverlist->expiration_interval.has_nanos);
+  EXPECT_EQ(c_serverlist->expiration_interval.nanos, 999);
+
+  gpr_slice_unref(encoded_slice);
+  grpc_grpclb_destroy_serverlist(c_serverlist);
+}
+
+}  // namespace
+}  // namespace grpc
+
+int main(int argc, char** argv) {
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
diff --git a/test/cpp/interop/client.cc b/test/cpp/interop/client.cc
index cb9b396beb55cfeb17bb21e53365033ac1c14e7b..788adefd24b01283892ee5ebe1aec761500cffb7 100644
--- a/test/cpp/interop/client.cc
+++ b/test/cpp/interop/client.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -74,6 +74,7 @@ DEFINE_string(test_case, "large_unary",
               "oauth2_auth_token: raw oauth2 access token auth; "
               "per_rpc_creds: raw oauth2 access token on a single rpc; "
               "status_code_and_message: verify status code & message; "
+              "custom_metadata: server will echo custom metadata;"
               "all : all of above.");
 DEFINE_string(default_service_account, "",
               "Email of GCE default service account");
@@ -129,6 +130,8 @@ int main(int argc, char** argv) {
     client.DoPerRpcCreds(json_key);
   } else if (FLAGS_test_case == "status_code_and_message") {
     client.DoStatusWithMessage();
+  } else if (FLAGS_test_case == "custom_metadata") {
+    client.DoCustomMetadata();
   } else if (FLAGS_test_case == "all") {
     client.DoEmpty();
     client.DoLargeUnary();
@@ -142,6 +145,7 @@ int main(int argc, char** argv) {
     client.DoTimeoutOnSleepingServer();
     client.DoEmptyStream();
     client.DoStatusWithMessage();
+    client.DoCustomMetadata();
     // service_account_creds and jwt_token_creds can only run with ssl.
     if (FLAGS_use_tls) {
       grpc::string json_key = GetServiceAccountJsonKey();
@@ -159,7 +163,7 @@ int main(int argc, char** argv) {
         "server_compressed_streaming|half_duplex|ping_pong|cancel_after_begin|"
         "cancel_after_first_response|timeout_on_sleeping_server|empty_stream|"
         "compute_engine_creds|jwt_token_creds|oauth2_auth_token|per_rpc_creds",
-        FLAGS_test_case.c_str());
+        "status_code_and_message|custom_metadata", FLAGS_test_case.c_str());
     ret = 1;
   }
 
diff --git a/test/cpp/interop/interop_client.cc b/test/cpp/interop/interop_client.cc
index b06310781a247d06bbb57d70d99ec4a2e6b2139f..46f6fdac4092ee99fb039c8da832f8c7f2fac069 100644
--- a/test/cpp/interop/interop_client.cc
+++ b/test/cpp/interop/interop_client.cc
@@ -625,5 +625,77 @@ void InteropClient::DoStatusWithMessage() {
   gpr_log(GPR_DEBUG, "Done testing Status and Message");
 }
 
+void InteropClient::DoCustomMetadata() {
+  const grpc::string kEchoInitialMetadataKey("x-grpc-test-echo-initial");
+  const grpc::string kInitialMetadataValue("test_initial_metadata_value");
+  const grpc::string kEchoTrailingBinMetadataKey(
+      "x-grpc-test-echo-trailing-bin");
+  const grpc::string kTrailingBinValue("\x0a\x0b\x0a\x0b\x0a\x0b");
+  ;
+
+  {
+    gpr_log(GPR_DEBUG, "Sending RPC with custom metadata");
+    ClientContext context;
+    context.AddMetadata(kEchoInitialMetadataKey, kInitialMetadataValue);
+    context.AddMetadata(kEchoTrailingBinMetadataKey, kTrailingBinValue);
+    SimpleRequest request;
+    SimpleResponse response;
+    request.set_response_size(kLargeResponseSize);
+    grpc::string payload(kLargeRequestSize, '\0');
+    request.mutable_payload()->set_body(payload.c_str(), kLargeRequestSize);
+
+    Status s = serviceStub_.Get()->UnaryCall(&context, request, &response);
+    AssertOkOrPrintErrorStatus(s);
+    const auto& server_initial_metadata = context.GetServerInitialMetadata();
+    auto iter = server_initial_metadata.find(kEchoInitialMetadataKey);
+    GPR_ASSERT(iter != server_initial_metadata.end());
+    GPR_ASSERT(iter->second.data() == kInitialMetadataValue);
+    const auto& server_trailing_metadata = context.GetServerTrailingMetadata();
+    iter = server_trailing_metadata.find(kEchoTrailingBinMetadataKey);
+    GPR_ASSERT(iter != server_trailing_metadata.end());
+    GPR_ASSERT(grpc::string(iter->second.begin(), iter->second.end()) ==
+               kTrailingBinValue);
+
+    gpr_log(GPR_DEBUG, "Done testing RPC with custom metadata");
+  }
+
+  {
+    gpr_log(GPR_DEBUG, "Sending stream with custom metadata");
+    ClientContext context;
+    context.AddMetadata(kEchoInitialMetadataKey, kInitialMetadataValue);
+    context.AddMetadata(kEchoTrailingBinMetadataKey, kTrailingBinValue);
+    std::unique_ptr<ClientReaderWriter<StreamingOutputCallRequest,
+                                       StreamingOutputCallResponse>>
+        stream(serviceStub_.Get()->FullDuplexCall(&context));
+
+    StreamingOutputCallRequest request;
+    request.set_response_type(PayloadType::COMPRESSABLE);
+    ResponseParameters* response_parameter = request.add_response_parameters();
+    response_parameter->set_size(kLargeResponseSize);
+    grpc::string payload(kLargeRequestSize, '\0');
+    request.mutable_payload()->set_body(payload.c_str(), kLargeRequestSize);
+    StreamingOutputCallResponse response;
+    GPR_ASSERT(stream->Write(request));
+    stream->WritesDone();
+    GPR_ASSERT(stream->Read(&response));
+    GPR_ASSERT(response.payload().body() ==
+               grpc::string(kLargeResponseSize, '\0'));
+    GPR_ASSERT(!stream->Read(&response));
+    Status s = stream->Finish();
+    AssertOkOrPrintErrorStatus(s);
+    const auto& server_initial_metadata = context.GetServerInitialMetadata();
+    auto iter = server_initial_metadata.find(kEchoInitialMetadataKey);
+    GPR_ASSERT(iter != server_initial_metadata.end());
+    GPR_ASSERT(iter->second.data() == kInitialMetadataValue);
+    const auto& server_trailing_metadata = context.GetServerTrailingMetadata();
+    iter = server_trailing_metadata.find(kEchoTrailingBinMetadataKey);
+    GPR_ASSERT(iter != server_trailing_metadata.end());
+    GPR_ASSERT(grpc::string(iter->second.begin(), iter->second.end()) ==
+               kTrailingBinValue);
+
+    gpr_log(GPR_DEBUG, "Done testing stream with custom metadata");
+  }
+}
+
 }  // namespace testing
 }  // namespace grpc
diff --git a/test/cpp/interop/interop_client.h b/test/cpp/interop/interop_client.h
index 3ecd3803985ee7c0233056999a0034baa32b7096..3f57f3c7336ff3d9d19ac62a40c171c2e063aed0 100644
--- a/test/cpp/interop/interop_client.h
+++ b/test/cpp/interop/interop_client.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -75,6 +75,7 @@ class InteropClient {
   void DoTimeoutOnSleepingServer();
   void DoEmptyStream();
   void DoStatusWithMessage();
+  void DoCustomMetadata();
   // Auth tests.
   // username is a string containing the user email
   void DoJwtTokenCreds(const grpc::string& username);
diff --git a/test/cpp/interop/server.cc b/test/cpp/interop/server.cc
index cdca060c237ff130599fcc40a75979d9bde4b70d..18ac35d551c48ce05377f446f42e8dd2b8ce93d0 100644
--- a/test/cpp/interop/server.cc
+++ b/test/cpp/interop/server.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -80,6 +80,36 @@ using grpc::Status;
 static bool got_sigint = false;
 static const char* kRandomFile = "test/cpp/interop/rnd.dat";
 
+const char kEchoInitialMetadataKey[] = "x-grpc-test-echo-initial";
+const char kEchoTrailingBinMetadataKey[] = "x-grpc-test-echo-trailing-bin";
+const char kEchoUserAgentKey[] = "x-grpc-test-echo-useragent";
+
+void MaybeEchoMetadata(ServerContext* context) {
+  const auto& client_metadata = context->client_metadata();
+  GPR_ASSERT(client_metadata.count(kEchoInitialMetadataKey) <= 1);
+  GPR_ASSERT(client_metadata.count(kEchoTrailingBinMetadataKey) <= 1);
+
+  auto iter = client_metadata.find(kEchoInitialMetadataKey);
+  if (iter != client_metadata.end()) {
+    context->AddInitialMetadata(kEchoInitialMetadataKey, iter->second.data());
+  }
+  iter = client_metadata.find(kEchoTrailingBinMetadataKey);
+  if (iter != client_metadata.end()) {
+    context->AddTrailingMetadata(
+        kEchoTrailingBinMetadataKey,
+        grpc::string(iter->second.begin(), iter->second.end()));
+  }
+  // Check if client sent a magic key in the header that makes us echo
+  // back the user-agent (for testing purpose)
+  iter = client_metadata.find(kEchoUserAgentKey);
+  if (iter != client_metadata.end()) {
+    iter = client_metadata.find("user-agent");
+    if (iter != client_metadata.end()) {
+      context->AddInitialMetadata(kEchoUserAgentKey, iter->second.data());
+    }
+  }
+}
+
 bool SetPayload(PayloadType type, int size, Payload* payload) {
   PayloadType response_type;
   if (type == PayloadType::RANDOM) {
@@ -130,11 +160,13 @@ class TestServiceImpl : public TestService::Service {
  public:
   Status EmptyCall(ServerContext* context, const grpc::testing::Empty* request,
                    grpc::testing::Empty* response) {
+    MaybeEchoMetadata(context);
     return Status::OK;
   }
 
   Status UnaryCall(ServerContext* context, const SimpleRequest* request,
                    SimpleResponse* response) {
+    MaybeEchoMetadata(context);
     SetResponseCompression(context, *request);
     if (request->response_size() > 0) {
       if (!SetPayload(request->response_type(), request->response_size(),
@@ -192,6 +224,7 @@ class TestServiceImpl : public TestService::Service {
       ServerContext* context,
       ServerReaderWriter<StreamingOutputCallResponse,
                          StreamingOutputCallRequest>* stream) {
+    MaybeEchoMetadata(context);
     StreamingOutputCallRequest request;
     StreamingOutputCallResponse response;
     bool write_success = true;
diff --git a/test/cpp/qps/qps_openloop_test.cc b/test/cpp/qps/qps_openloop_test.cc
index 0ac41d9f96337f7188c09195b2a35a0ec4629221..27f266b32be56f7bc2d72364b9e9b6a6ce9c2bde 100644
--- a/test/cpp/qps/qps_openloop_test.cc
+++ b/test/cpp/qps/qps_openloop_test.cc
@@ -35,6 +35,7 @@
 
 #include <grpc/support/log.h>
 
+#include "test/core/util/test_config.h"
 #include "test/cpp/qps/driver.h"
 #include "test/cpp/qps/report.h"
 #include "test/cpp/util/benchmark_config.h"
@@ -55,11 +56,11 @@ static void RunQPS() {
   client_config.set_async_client_threads(8);
   client_config.set_rpc_type(STREAMING);
   client_config.mutable_load_params()->mutable_poisson()->set_offered_load(
-      1000.0);
+      1000.0 / GRPC_TEST_SLOWDOWN_FACTOR);
 
   ServerConfig server_config;
   server_config.set_server_type(ASYNC_SERVER);
-  server_config.set_async_server_threads(4);
+  server_config.set_async_server_threads(8);
 
   const auto result =
       RunScenario(client_config, 1, server_config, 1, WARMUP, BENCHMARK, -2);
diff --git a/test/cpp/util/test_credentials_provider.cc b/test/cpp/util/test_credentials_provider.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1086e14258b0c54c69a649a0507a0f655246227b
--- /dev/null
+++ b/test/cpp/util/test_credentials_provider.cc
@@ -0,0 +1,82 @@
+
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/cpp/util/test_credentials_provider.h"
+
+#include "test/core/end2end/data/ssl_test_data.h"
+
+namespace grpc {
+namespace testing {
+
+const char kTlsCredentialsType[] = "TLS_CREDENTIALS";
+
+std::shared_ptr<ChannelCredentials> GetChannelCredentials(
+    const grpc::string& type, ChannelArguments* args) {
+  if (type == kInsecureCredentialsType) {
+    return InsecureChannelCredentials();
+  } else if (type == kTlsCredentialsType) {
+    SslCredentialsOptions ssl_opts = {test_root_cert, "", ""};
+    args->SetSslTargetNameOverride("foo.test.google.fr");
+    return SslCredentials(ssl_opts);
+  } else {
+    gpr_log(GPR_ERROR, "Unsupported credentials type %s.", type.c_str());
+  }
+  return nullptr;
+}
+
+std::shared_ptr<ServerCredentials> GetServerCredentials(
+    const grpc::string& type) {
+  if (type == kInsecureCredentialsType) {
+    return InsecureServerCredentials();
+  } else if (type == kTlsCredentialsType) {
+    SslServerCredentialsOptions::PemKeyCertPair pkcp = {test_server1_key,
+                                                        test_server1_cert};
+    SslServerCredentialsOptions ssl_opts;
+    ssl_opts.pem_root_certs = "";
+    ssl_opts.pem_key_cert_pairs.push_back(pkcp);
+    return SslServerCredentials(ssl_opts);
+  } else {
+    gpr_log(GPR_ERROR, "Unsupported credentials type %s.", type.c_str());
+  }
+  return nullptr;
+}
+
+std::vector<grpc::string> GetSecureCredentialsTypeList() {
+  std::vector<grpc::string> types;
+  types.push_back(kTlsCredentialsType);
+  return types;
+}
+
+}  // namespace testing
+}  // namespace grpc
diff --git a/test/cpp/util/test_credentials_provider.h b/test/cpp/util/test_credentials_provider.h
new file mode 100644
index 0000000000000000000000000000000000000000..f7253051a97dd7c3f6f296a0ee77ccaec717708e
--- /dev/null
+++ b/test/cpp/util/test_credentials_provider.h
@@ -0,0 +1,63 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_TEST_CPP_UTIL_TEST_CREDENTIALS_PROVIDER_H
+#define GRPC_TEST_CPP_UTIL_TEST_CREDENTIALS_PROVIDER_H
+
+#include <memory>
+
+#include <grpc++/security/credentials.h>
+#include <grpc++/security/server_credentials.h>
+#include <grpc++/support/channel_arguments.h>
+
+namespace grpc {
+namespace testing {
+
+const char kInsecureCredentialsType[] = "INSECURE_CREDENTIALS";
+
+// Provide channel credentials according to the given type. Alter the channel
+// arguments if needed.
+std::shared_ptr<ChannelCredentials> GetChannelCredentials(
+    const grpc::string& type, ChannelArguments* args);
+
+// Provide server credentials according to the given type.
+std::shared_ptr<ServerCredentials> GetServerCredentials(
+    const grpc::string& type);
+
+// Provide a list of secure credentials type.
+std::vector<grpc::string> GetSecureCredentialsTypeList();
+
+}  // namespace testing
+}  // namespace grpc
+
+#endif  // GRPC_TEST_CPP_UTIL_TEST_CREDENTIALS_PROVIDER_H
diff --git a/test/distrib/php/distribtest.php b/test/distrib/php/distribtest.php
new file mode 100644
index 0000000000000000000000000000000000000000..318c6f9cf08f2dc5f4af681aa1106f66bb00bb23
--- /dev/null
+++ b/test/distrib/php/distribtest.php
@@ -0,0 +1,13 @@
+<?php
+
+$channel = new Grpc\Channel('localhost:1000', [
+    'credentials' => Grpc\ChannelCredentials::createInsecure()
+]);
+
+$deadline = Grpc\Timeval::infFuture();
+$call = new Grpc\Call($channel,
+                      'dummy_method',
+                      $deadline);
+
+$call->cancel();
+$channel->close();
diff --git a/test/distrib/php/run_distrib_test.sh b/test/distrib/php/run_distrib_test.sh
new file mode 100755
index 0000000000000000000000000000000000000000..43b28d842903c1b9213975552ae3f91e59676926
--- /dev/null
+++ b/test/distrib/php/run_distrib_test.sh
@@ -0,0 +1,39 @@
+#!/bin/bash
+# Copyright 2015-2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+set -ex
+
+cd $(dirname $0)
+
+cp -r $EXTERNAL_GIT_ROOT/input_artifacts/grpc-php.tgz .
+
+pecl install grpc-php.tgz
+
+php -d extension=grpc.so -d max_execution_time=300 distribtest.php
diff --git a/third_party/nanopb b/third_party/nanopb
new file mode 160000
index 0000000000000000000000000000000000000000..5497a1dfc91a86965383cdd1652e348345400435
--- /dev/null
+++ b/third_party/nanopb
@@ -0,0 +1 @@
+Subproject commit 5497a1dfc91a86965383cdd1652e348345400435
diff --git a/tools/codegen/core/gen_load_balancing_proto.sh b/tools/codegen/core/gen_load_balancing_proto.sh
new file mode 100755
index 0000000000000000000000000000000000000000..fb6a468ee0b68d376919750427e89f5f46b23ffb
--- /dev/null
+++ b/tools/codegen/core/gen_load_balancing_proto.sh
@@ -0,0 +1,138 @@
+#!/bin/bash
+
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#
+# Example usage:
+#   tools/codegen/core/gen_load_balancing_proto.sh \
+#     src/proto/grpc/lb/v0/load_balancer.proto
+
+read -r -d '' COPYRIGHT <<'EOF'
+/*
+ *
+ * Copyright <YEAR>, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+EOF
+
+CURRENT_YEAR=$(date +%Y)
+COPYRIGHT_FILE=$(mktemp)
+echo "${COPYRIGHT/<YEAR>/$CURRENT_YEAR}" > $COPYRIGHT_FILE
+
+set -ex
+if [ $# -eq 0 ]; then
+  echo "Usage: $0 <load_balancer.proto> [output dir]"
+  exit 1
+fi
+
+readonly GRPC_ROOT=$PWD
+
+OUTPUT_DIR="$GRPC_ROOT/src/core/proto/grpc/lb/v0"
+if [ $# -eq 2 ]; then
+  mkdir -p "$2"
+  if [ $? != 0 ]; then
+    echo "Error creating output directory $2"
+    exit 2
+  fi
+  OUTPUT_DIR="$2"
+fi
+
+readonly EXPECTED_OPTIONS_FILE_PATH="${1%.*}.options"
+
+if [[ ! -f "$1" ]]; then
+  echo "Input proto file '$1' doesn't exist."
+  exit 3
+fi
+if [[ ! -f "${EXPECTED_OPTIONS_FILE_PATH}" ]]; then
+  echo "Expected nanopb options file '${EXPECTED_OPTIONS_FILE_PATH}' missing"
+  exit 4
+fi
+
+readonly VENV_DIR=$(mktemp -d)
+readonly VENV_NAME="nanopb-$(date '+%Y%m%d_%H%M%S_%N')"
+pushd $VENV_DIR
+virtualenv $VENV_NAME
+. $VENV_NAME/bin/activate
+popd
+
+# this should be the same version as the submodule we compile against
+# ideally we'd update this as a template to ensure that
+pip install protobuf==3.0.0b2
+
+pushd "$(dirname $1)" > /dev/null
+
+protoc \
+--plugin=protoc-gen-nanopb="$GRPC_ROOT/third_party/nanopb/generator/protoc-gen-nanopb" \
+--nanopb_out='-T -L#include\ \"third_party/nanopb/pb.h\"'":$OUTPUT_DIR" \
+"$(basename $1)"
+
+readonly PROTO_BASENAME=$(basename $1 .proto)
+sed -i "s:$PROTO_BASENAME.pb.h:src/core/proto/grpc/lb/v0/$PROTO_BASENAME.pb.h:g" \
+    "$OUTPUT_DIR/$PROTO_BASENAME.pb.c"
+
+# prepend copyright
+TMPFILE=$(mktemp)
+cat $COPYRIGHT_FILE "$OUTPUT_DIR/$PROTO_BASENAME.pb.c" > $TMPFILE
+mv -v $TMPFILE "$OUTPUT_DIR/$PROTO_BASENAME.pb.c"
+cat $COPYRIGHT_FILE "$OUTPUT_DIR/$PROTO_BASENAME.pb.h" > $TMPFILE
+mv -v $TMPFILE "$OUTPUT_DIR/$PROTO_BASENAME.pb.h"
+
+deactivate
+rm -rf $VENV_DIR
+
+popd > /dev/null
diff --git a/tools/distrib/check_nanopb_output.sh b/tools/distrib/check_nanopb_output.sh
new file mode 100755
index 0000000000000000000000000000000000000000..5f49ebb93e645981c3e15c2c624866eea2e7c1b9
--- /dev/null
+++ b/tools/distrib/check_nanopb_output.sh
@@ -0,0 +1,68 @@
+#!/bin/bash
+# Copyright 2015-2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+set -ex
+
+apt-get install -y autoconf automake libtool curl python-virtualenv
+
+readonly NANOPB_TMP_OUTPUT="$(mktemp -d)"
+
+# install protoc version 3
+pushd third_party/protobuf
+./autogen.sh
+./configure
+make
+make install
+ldconfig
+popd
+
+if [ ! -x "/usr/local/bin/protoc" ]; then
+  echo "Error: protoc not found in path"
+  exit 1
+fi
+readonly PROTOC_PATH='/usr/local/bin'
+# stack up and change to nanopb's proto generator directory
+pushd third_party/nanopb/generator/proto
+PATH="$PROTOC_PATH:$PATH" make
+
+# back to the root directory
+popd
+
+
+# nanopb-compile the proto to a temp location
+PATH="$PROTOC_PATH:$PATH" ./tools/codegen/core/gen_load_balancing_proto.sh \
+  src/proto/grpc/lb/v0/load_balancer.proto \
+  $NANOPB_TMP_OUTPUT
+
+# compare outputs to checked compiled code
+if ! diff -r $NANOPB_TMP_OUTPUT src/core/proto/grpc/lb/v0; then
+  echo "Outputs differ: $NANOPB_TMP_OUTPUT vs src/core/proto/grpc/lb/v0"
+  exit 2
+fi
diff --git a/tools/dockerfile/distribtest/php_jessie_x64/Dockerfile b/tools/dockerfile/distribtest/php_jessie_x64/Dockerfile
new file mode 100644
index 0000000000000000000000000000000000000000..d5d3fd626ff9398fed6e78085127cc932079321d
--- /dev/null
+++ b/tools/dockerfile/distribtest/php_jessie_x64/Dockerfile
@@ -0,0 +1,32 @@
+# Copyright 2015-2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+FROM debian:jessie
+
+RUN apt-get update && apt-get install -y php5 php5-dev php-pear phpunit
diff --git a/tools/dockerfile/grpc_artifact_linux_x64/Dockerfile b/tools/dockerfile/grpc_artifact_linux_x64/Dockerfile
index 41dc4274541e29df4892af423e6b70cd26e4f447..d048b725c85a249d18c25ca3323fab1713a47446 100644
--- a/tools/dockerfile/grpc_artifact_linux_x64/Dockerfile
+++ b/tools/dockerfile/grpc_artifact_linux_x64/Dockerfile
@@ -91,6 +91,13 @@ RUN /bin/bash -l -c "echo 'export PATH=/usr/local/rvm/bin:$PATH' >> ~/.bashrc"
 RUN /bin/bash -l -c "echo 'rvm --default use ruby-2.1' >> ~/.bashrc"
 RUN /bin/bash -l -c "gem install bundler --no-ri --no-rdoc"
 
+
+##################
+# PHP dependencies
+
+RUN apt-get update && apt-get install -y \
+    php5 php5-dev php-pear phpunit
+
 RUN mkdir /var/local/jenkins
 
 # Define the default command.
diff --git a/tools/dockerfile/grpc_artifact_protoc/Dockerfile b/tools/dockerfile/grpc_artifact_protoc/Dockerfile
new file mode 100644
index 0000000000000000000000000000000000000000..1bbc6e021bc67a6d2419bef498485704f86bcda3
--- /dev/null
+++ b/tools/dockerfile/grpc_artifact_protoc/Dockerfile
@@ -0,0 +1,63 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Docker file for building protoc and gRPC protoc plugin artifacts.
+# forked from https://github.com/google/protobuf/blob/master/protoc-artifacts/Dockerfile
+
+FROM centos:6.6
+
+RUN yum install -y git \
+                   tar \
+                   wget \
+                   make \
+                   autoconf \
+                   curl-devel \
+                   unzip \
+                   automake \
+                   libtool \
+                   glibc-static.i686 \
+                   glibc-devel \
+                   glibc-devel.i686
+
+# Install GCC 4.7 to support -static-libstdc++
+RUN wget http://people.centos.org/tru/devtools-1.1/devtools-1.1.repo -P /etc/yum.repos.d
+RUN bash -c 'echo "enabled=1" >> /etc/yum.repos.d/devtools-1.1.repo'
+RUN bash -c "sed -e 's/\$basearch/i386/g' /etc/yum.repos.d/devtools-1.1.repo > /etc/yum.repos.d/devtools-i386-1.1.repo"
+RUN sed -e 's/testing-/testing-i386-/g' -i /etc/yum.repos.d/devtools-i386-1.1.repo
+
+# We'll get and "Rpmdb checksum is invalid: dCDPT(pkg checksums)" error caused by
+# docker issue when using overlay storage driver, but all the stuff we need
+# will be installed, so for now we just ignore the error.
+# https://github.com/docker/docker/issues/10180
+RUN yum install -y devtoolset-1.1 \
+                   devtoolset-1.1-libstdc++-devel \
+                   devtoolset-1.1-libstdc++-devel.i686 || true
+
+# Start in devtoolset environment that uses GCC 4.7
+CMD ["scl", "enable", "devtoolset-1.1", "bash"]
diff --git a/tools/dockerfile/grpc_clang_format/clang_format_all_the_things.sh b/tools/dockerfile/grpc_clang_format/clang_format_all_the_things.sh
index dd8ea1ac305a51ff356b64850e211483c77298bb..d56bc0183118c8016ad1845d9c8c1f19a144334f 100755
--- a/tools/dockerfile/grpc_clang_format/clang_format_all_the_things.sh
+++ b/tools/dockerfile/grpc_clang_format/clang_format_all_the_things.sh
@@ -44,7 +44,7 @@ for dir in $DIRS
 do
   for glob in $GLOB
   do
-    files="$files `find /local-code/$dir -name $glob -and -not -name *.generated.*`"
+    files="$files `find /local-code/$dir -name $glob -and -not -name *.generated.* -and -not -name *.pb.h -and -not -name *.pb.c`"
   done
 done
 
diff --git a/tools/dockerfile/test/cxx_squeeze_x64/Dockerfile b/tools/dockerfile/test/cxx_squeeze_x64/Dockerfile
new file mode 100644
index 0000000000000000000000000000000000000000..08488874347797e4c666cfb4fa70e9509ca3ff73
--- /dev/null
+++ b/tools/dockerfile/test/cxx_squeeze_x64/Dockerfile
@@ -0,0 +1,84 @@
+# Copyright 2015-2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+FROM debian:squeeze
+
+# Install Git and basic packages.
+RUN apt-get update && apt-get install -y \
+  autoconf \
+  autotools-dev \
+  build-essential \
+  bzip2 \
+  ccache \
+  curl \
+  gcc \
+  gcc-multilib \
+  git \
+  gyp \
+  lcov \
+  libc6 \
+  libc6-dbg \
+  libc6-dev \
+  libgtest-dev \
+  libtool \
+  make \
+  perl \
+  strace \
+  python-dev \
+  python-setuptools \
+  python-yaml \
+  telnet \
+  unzip \
+  wget \
+  zip && apt-get clean
+
+#================
+# Build profiling
+RUN apt-get update && apt-get install -y time && apt-get clean
+
+
+# libgflags-dev is not available on squeezy
+RUN apt-get update && apt-get -y install libgtest-dev libc++-dev clang && apt-get clean
+
+RUN apt-get update && apt-get -y install python-pip && apt-get clean
+RUN pip install argparse
+
+# Prepare ccache
+RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
+RUN ln -s /usr/bin/ccache /usr/local/bin/g++
+RUN ln -s /usr/bin/ccache /usr/local/bin/cc
+RUN ln -s /usr/bin/ccache /usr/local/bin/c++
+RUN ln -s /usr/bin/ccache /usr/local/bin/clang
+RUN ln -s /usr/bin/ccache /usr/local/bin/clang++
+
+
+RUN mkdir /var/local/jenkins
+
+# Define the default command.
+CMD ["bash"]
diff --git a/tools/dockerfile/test/cxx_ubuntu1604_x64/Dockerfile b/tools/dockerfile/test/cxx_ubuntu1604_x64/Dockerfile
new file mode 100644
index 0000000000000000000000000000000000000000..c6fe79b42c064aa1cc29be1fde790531fa449b62
--- /dev/null
+++ b/tools/dockerfile/test/cxx_ubuntu1604_x64/Dockerfile
@@ -0,0 +1,86 @@
+# Copyright 2015-2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+FROM ubuntu:16.04
+
+# Install Git and basic packages.
+RUN apt-get update && apt-get install -y \
+  autoconf \
+  autotools-dev \
+  build-essential \
+  bzip2 \
+  ccache \
+  curl \
+  gcc \
+  gcc-multilib \
+  git \
+  golang \
+  gyp \
+  lcov \
+  libc6 \
+  libc6-dbg \
+  libc6-dev \
+  libgtest-dev \
+  libtool \
+  make \
+  perl \
+  strace \
+  python-dev \
+  python-setuptools \
+  python-yaml \
+  telnet \
+  unzip \
+  wget \
+  zip && apt-get clean
+
+#================
+# Build profiling
+RUN apt-get update && apt-get install -y time && apt-get clean
+
+#=================
+# C++ dependencies
+RUN apt-get update && apt-get -y install libgflags-dev libgtest-dev libc++-dev clang && apt-get clean
+
+# Prepare ccache
+RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
+RUN ln -s /usr/bin/ccache /usr/local/bin/g++
+RUN ln -s /usr/bin/ccache /usr/local/bin/cc
+RUN ln -s /usr/bin/ccache /usr/local/bin/c++
+RUN ln -s /usr/bin/ccache /usr/local/bin/clang
+RUN ln -s /usr/bin/ccache /usr/local/bin/clang++
+
+#======================
+# Zookeeper dependencies
+# TODO(jtattermusch): is zookeeper still needed?
+RUN apt-get install -y libzookeeper-mt-dev
+
+RUN mkdir /var/local/jenkins
+
+# Define the default command.
+CMD ["bash"]
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index a2b83ec7117cdf9e6a7dc651d08a5d606a6b4f86..b0a1561df99e5a403b1e928b35a7b082266e9f9c 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -773,20 +773,6 @@ include/grpc/compression.h \
 include/grpc/grpc.h \
 include/grpc/status.h \
 include/grpc/census.h \
-src/core/security/auth_filters.h \
-src/core/security/base64.h \
-src/core/security/credentials.h \
-src/core/security/handshake.h \
-src/core/security/json_token.h \
-src/core/security/jwt_verifier.h \
-src/core/security/secure_endpoint.h \
-src/core/security/security_connector.h \
-src/core/security/security_context.h \
-src/core/tsi/fake_transport_security.h \
-src/core/tsi/ssl_transport_security.h \
-src/core/tsi/ssl_types.h \
-src/core/tsi/transport_security.h \
-src/core/tsi/transport_security_interface.h \
 src/core/census/grpc_filter.h \
 src/core/channel/channel_args.h \
 src/core/channel/channel_stack.h \
@@ -801,6 +787,7 @@ src/core/channel/subchannel_call_holder.h \
 src/core/client_config/client_config.h \
 src/core/client_config/connector.h \
 src/core/client_config/initial_connect_string.h \
+src/core/client_config/lb_policies/load_balancer_api.h \
 src/core/client_config/lb_policies/pick_first.h \
 src/core/client_config/lb_policies/round_robin.h \
 src/core/client_config/lb_policy.h \
@@ -861,6 +848,7 @@ src/core/json/json.h \
 src/core/json/json_common.h \
 src/core/json/json_reader.h \
 src/core/json/json_writer.h \
+src/core/proto/grpc/lb/v0/load_balancer.pb.h \
 src/core/statistics/census_interface.h \
 src/core/statistics/census_rpc_stats.h \
 src/core/surface/api_trace.h \
@@ -900,30 +888,27 @@ src/core/transport/metadata_batch.h \
 src/core/transport/static_metadata.h \
 src/core/transport/transport.h \
 src/core/transport/transport_impl.h \
+src/core/security/auth_filters.h \
+src/core/security/base64.h \
+src/core/security/credentials.h \
+src/core/security/handshake.h \
+src/core/security/json_token.h \
+src/core/security/jwt_verifier.h \
+src/core/security/secure_endpoint.h \
+src/core/security/security_connector.h \
+src/core/security/security_context.h \
+src/core/tsi/fake_transport_security.h \
+src/core/tsi/ssl_transport_security.h \
+src/core/tsi/ssl_types.h \
+src/core/tsi/transport_security.h \
+src/core/tsi/transport_security_interface.h \
 src/core/census/aggregation.h \
-src/core/census/log.h \
+src/core/census/mlog.h \
 src/core/census/rpc_metric_id.h \
-src/core/httpcli/httpcli_security_connector.c \
-src/core/security/base64.c \
-src/core/security/client_auth_filter.c \
-src/core/security/credentials.c \
-src/core/security/credentials_metadata.c \
-src/core/security/credentials_posix.c \
-src/core/security/credentials_win32.c \
-src/core/security/google_default_credentials.c \
-src/core/security/handshake.c \
-src/core/security/json_token.c \
-src/core/security/jwt_verifier.c \
-src/core/security/secure_endpoint.c \
-src/core/security/security_connector.c \
-src/core/security/security_context.c \
-src/core/security/server_auth_filter.c \
-src/core/security/server_secure_chttp2.c \
-src/core/surface/init_secure.c \
-src/core/surface/secure_channel_create.c \
-src/core/tsi/fake_transport_security.c \
-src/core/tsi/ssl_transport_security.c \
-src/core/tsi/transport_security.c \
+third_party/nanopb/pb.h \
+third_party/nanopb/pb_common.h \
+third_party/nanopb/pb_decode.h \
+third_party/nanopb/pb_encode.h \
 src/core/census/grpc_context.c \
 src/core/census/grpc_filter.c \
 src/core/channel/channel_args.c \
@@ -939,6 +924,7 @@ src/core/client_config/client_config.c \
 src/core/client_config/connector.c \
 src/core/client_config/default_initial_connect_string.c \
 src/core/client_config/initial_connect_string.c \
+src/core/client_config/lb_policies/load_balancer_api.c \
 src/core/client_config/lb_policies/pick_first.c \
 src/core/client_config/lb_policies/round_robin.c \
 src/core/client_config/lb_policy.c \
@@ -1003,6 +989,7 @@ src/core/json/json.c \
 src/core/json/json_reader.c \
 src/core/json/json_string.c \
 src/core/json/json_writer.c \
+src/core/proto/grpc/lb/v0/load_balancer.pb.c \
 src/core/surface/alarm.c \
 src/core/surface/api_trace.c \
 src/core/surface/byte_buffer.c \
@@ -1052,12 +1039,36 @@ src/core/transport/metadata_batch.c \
 src/core/transport/static_metadata.c \
 src/core/transport/transport.c \
 src/core/transport/transport_op_string.c \
+src/core/httpcli/httpcli_security_connector.c \
+src/core/security/base64.c \
+src/core/security/client_auth_filter.c \
+src/core/security/credentials.c \
+src/core/security/credentials_metadata.c \
+src/core/security/credentials_posix.c \
+src/core/security/credentials_win32.c \
+src/core/security/google_default_credentials.c \
+src/core/security/handshake.c \
+src/core/security/json_token.c \
+src/core/security/jwt_verifier.c \
+src/core/security/secure_endpoint.c \
+src/core/security/security_connector.c \
+src/core/security/security_context.c \
+src/core/security/server_auth_filter.c \
+src/core/security/server_secure_chttp2.c \
+src/core/surface/init_secure.c \
+src/core/surface/secure_channel_create.c \
+src/core/tsi/fake_transport_security.c \
+src/core/tsi/ssl_transport_security.c \
+src/core/tsi/transport_security.c \
 src/core/census/context.c \
 src/core/census/initialize.c \
-src/core/census/log.c \
+src/core/census/mlog.c \
 src/core/census/operation.c \
 src/core/census/placeholders.c \
 src/core/census/tracing.c \
+third_party/nanopb/pb_common.c \
+third_party/nanopb/pb_decode.c \
+third_party/nanopb/pb_encode.c \
 include/grpc/support/alloc.h \
 include/grpc/support/atm.h \
 include/grpc/support/atm_gcc_atomic.h \
diff --git a/tools/jenkins/build_docker_and_run_tests.sh b/tools/jenkins/build_docker_and_run_tests.sh
index e2ac7518f09992e9088852df21ca8cfe92d8fe75..458e8ca0c70b0dfa9e3f4d77e58d22b923e1e2e9 100755
--- a/tools/jenkins/build_docker_and_run_tests.sh
+++ b/tools/jenkins/build_docker_and_run_tests.sh
@@ -60,6 +60,9 @@ docker build -t $DOCKER_IMAGE_NAME $DOCKERFILE_DIR
 # Choose random name for docker container
 CONTAINER_NAME="run_tests_$(uuidgen)"
 
+# Git root as seen by the docker instance
+docker_instance_git_root=/var/local/jenkins/grpc
+
 # Run tests inside docker
 docker run \
   -e "RUN_TESTS_COMMAND=$RUN_TESTS_COMMAND" \
@@ -69,9 +72,10 @@ docker run \
   -e XDG_CACHE_HOME=/tmp/xdg-cache-home \
   -e THIS_IS_REALLY_NEEDED='see https://github.com/docker/docker/issues/14203 for why docker is awful' \
   -e HOST_GIT_ROOT=$git_root \
+  -e LOCAL_GIT_ROOT=$docker_instance_git_root \
   -e "BUILD_ID=$BUILD_ID" \
   -i $TTY_FLAG \
-  -v "$git_root:/var/local/jenkins/grpc" \
+  -v "$git_root:$docker_instance_git_root" \
   -v /tmp/ccache:/tmp/ccache \
   -v /tmp/npm-cache:/tmp/npm-cache \
   -v /tmp/xdg-cache-home:/tmp/xdg-cache-home \
@@ -82,11 +86,6 @@ docker run \
   $DOCKER_IMAGE_NAME \
   bash -l "/var/local/jenkins/grpc/$DOCKER_RUN_SCRIPT" || DOCKER_FAILED="true"
 
-if [ "$XML_REPORT" != "" ]
-then
-  docker cp "$CONTAINER_NAME:/var/local/git/grpc/$XML_REPORT" $git_root || true
-fi
-
 docker cp "$CONTAINER_NAME:/var/local/git/grpc/reports.zip" $git_root || true
 unzip -o $git_root/reports.zip -d $git_root || true
 rm -f reports.zip
diff --git a/tools/jenkins/docker_run_tests.sh b/tools/jenkins/docker_run_tests.sh
index 282b85735110284599540571f81b17607e9b48ca..2e40f8fd65a79911246fb18800d448cef20c1b38 100755
--- a/tools/jenkins/docker_run_tests.sh
+++ b/tools/jenkins/docker_run_tests.sh
@@ -60,5 +60,6 @@ echo '</body></html>' >> index.html
 cd ..
 
 zip -r reports.zip reports
+find . -name reports.xml | xargs zip reports.zip
 
 exit $exit_code
diff --git a/tools/jenkins/run_performance.sh b/tools/jenkins/run_performance.sh
index d7e73d4272b61784d6dac14b74d4ec87d1040559..fbc078330f72daf57a7e4e301488972ed4cfb0c4 100755
--- a/tools/jenkins/run_performance.sh
+++ b/tools/jenkins/run_performance.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -47,9 +47,90 @@ PID1=$!
 bins/$config/qps_worker -driver_port 10010 &
 PID2=$!
 
+#
+# Put a timeout on these tests
+#
+((sleep 900; kill $$ && killall qps_worker && rm -f /tmp/qps-test.$$ )&)
+
 export QPS_WORKERS="localhost:10000,localhost:10010"
 
-bins/$config/qps_driver
+# big is the size in bytes of large messages (0 is the size otherwise)
+big=65536
+
+# wide is the number of client channels in multi-channel tests (1 otherwise)
+wide=64
+
+# deep is the number of RPCs outstanding on a channel in non-ping-pong tests
+# (the value used is 1 otherwise)
+deep=100
+
+#
+# Get total core count
+cores=`grep -c ^processor /proc/cpuinfo`
+halfcores=`expr $cores / 2`
+
+for secure in true false; do
+  # Scenario 1: generic async streaming ping-pong (contentionless latency)
+  bins/$config/qps_driver --rpc_type=STREAMING --client_type=ASYNC_CLIENT \
+    --server_type=ASYNC_GENERIC_SERVER --outstanding_rpcs_per_channel=1 \
+    --client_channels=1 --bbuf_req_size=0 --bbuf_resp_size=0 \
+    --async_client_threads=1 --async_server_threads=1 --secure_test=$secure \
+    --num_servers=1 --num_clients=1 \
+    --server_core_limit=$halfcores --client_core_limit=0
+
+  # Scenario 2: generic async streaming "unconstrained" (QPS)
+  bins/$config/qps_driver --rpc_type=STREAMING --client_type=ASYNC_CLIENT \
+    --server_type=ASYNC_GENERIC_SERVER --outstanding_rpcs_per_channel=$deep \
+    --client_channels=$wide --bbuf_req_size=0 --bbuf_resp_size=0 \
+    --async_client_threads=0 --async_server_threads=0 --secure_test=$secure \
+    --num_servers=1 --num_clients=0 \
+    --server_core_limit=$halfcores --client_core_limit=0 |& tee /tmp/qps-test.$$
+
+  # Scenario 2b: QPS with a single server core
+  bins/$config/qps_driver --rpc_type=STREAMING --client_type=ASYNC_CLIENT \
+    --server_type=ASYNC_GENERIC_SERVER --outstanding_rpcs_per_channel=$deep \
+    --client_channels=$wide --bbuf_req_size=0 --bbuf_resp_size=0 \
+    --async_client_threads=0 --async_server_threads=0 --secure_test=$secure \
+    --num_servers=1 --num_clients=0 --server_core_limit=1 --client_core_limit=0
+
+  # Scenario 2c: protobuf-based QPS
+  bins/$config/qps_driver --rpc_type=STREAMING --client_type=ASYNC_CLIENT \
+    --server_type=ASYNC_SERVER --outstanding_rpcs_per_channel=$deep \
+    --client_channels=$wide --simple_req_size=0 --simple_resp_size=0 \
+    --async_client_threads=0 --async_server_threads=0 --secure_test=$secure \
+    --num_servers=1 --num_clients=0 \
+    --server_core_limit=$halfcores --client_core_limit=0
+
+  # Scenario 3: Latency at sub-peak load (all clients equally loaded)
+  for loadfactor in 0.7; do
+    bins/$config/qps_driver --rpc_type=STREAMING --client_type=ASYNC_CLIENT \
+      --server_type=ASYNC_GENERIC_SERVER --outstanding_rpcs_per_channel=$deep \
+      --client_channels=$wide --bbuf_req_size=0 --bbuf_resp_size=0 \
+      --async_client_threads=0 --async_server_threads=0 --secure_test=$secure \
+      --num_servers=1 --num_clients=0 --poisson_load=`awk -v lf=$loadfactor \
+      '$5 == "QPS:" {print int(lf * $6); exit}' /tmp/qps-test.$$` \
+      --server_core_limit=$halfcores --client_core_limit=0
+  done
+
+  rm /tmp/qps-test.$$
+
+  # Scenario 4: Single-channel bidirectional throughput test (like TCP_STREAM).
+  bins/$config/qps_driver --rpc_type=STREAMING --client_type=ASYNC_CLIENT \
+    --server_type=ASYNC_GENERIC_SERVER --outstanding_rpcs_per_channel=$deep \
+    --client_channels=1 --bbuf_req_size=$big --bbuf_resp_size=$big \
+    --async_client_threads=1 --async_server_threads=1 --secure_test=$secure \
+    --num_servers=1 --num_clients=1 \
+    --server_core_limit=$halfcores --client_core_limit=0
+
+  # Scenario 5: Sync unary ping-pong with protobufs
+  bins/$config/qps_driver --rpc_type=UNARY --client_type=SYNC_CLIENT \
+    --server_type=SYNC_SERVER --outstanding_rpcs_per_channel=1 \
+    --client_channels=1 --simple_req_size=0 --simple_resp_size=0 \
+    --secure_test=$secure --num_servers=1 --num_clients=1 \
+    --server_core_limit=$halfcores --client_core_limit=0
+
+done
+
+bins/$config/qps_driver --quit=true
 
-kill -2 $PID1 $PID2
 wait
diff --git a/tools/run_tests/artifact_targets.py b/tools/run_tests/artifact_targets.py
index 9cd02c5e432e0a517e74478f5c2f49c7588c620c..803d3d106b21532521712c393b76854c49466c45 100644
--- a/tools/run_tests/artifact_targets.py
+++ b/tools/run_tests/artifact_targets.py
@@ -79,6 +79,17 @@ def macos_arch_env(arch):
     raise Exception('Unsupported arch')
   return {'CFLAGS': arch_arg, 'LDFLAGS': arch_arg}
 
+_MACOS_COMPAT_FLAG = '-mmacosx-version-min=10.7'
+
+_ARCH_FLAG_MAP = {
+  'x86': '-m32',
+  'x64': '-m64'
+}
+
+python_version_arch_map = {
+  'x86': 'Python27_32bits',
+  'x64': 'Python27'
+}
 
 class PythonArtifact:
   """Builds Python artifacts."""
@@ -88,27 +99,31 @@ class PythonArtifact:
     self.platform = platform
     self.arch = arch
     self.labels = ['artifact', 'python', platform, arch]
+    self.python_version = python_version_arch_map[arch]
 
   def pre_build_jobspecs(self):
       return []
 
   def build_jobspec(self):
-    if self.platform == 'windows':
-      raise Exception('Not supported yet.')
+    environ = {}
+    if self.platform == 'linux':
+      if self.arch == 'x86':
+        environ['SETARCH_CMD'] = 'linux32'
+      return create_docker_jobspec(self.name,
+          'tools/dockerfile/grpc_artifact_linux_%s' % self.arch,
+          'tools/run_tests/build_artifact_python.sh',
+          environ=environ)
+    elif self.platform == 'windows':
+      return create_jobspec(self.name,
+                            ['tools\\run_tests\\build_artifact_python.bat',
+                             self.python_version
+                            ],
+                            shell=True)
     else:
-      environ = {}
-      if self.platform == 'linux':
-        if self.arch == 'x86':
-          environ['SETARCH_CMD'] = 'linux32'
-        return create_docker_jobspec(self.name,
-            'tools/dockerfile/grpc_artifact_linux_%s' % self.arch,
-            'tools/run_tests/build_artifact_python.sh',
-            environ=environ)
-      else:
-        environ['SKIP_PIP_INSTALL'] = 'TRUE'
-        return create_jobspec(self.name,
-                              ['tools/run_tests/build_artifact_python.sh'],
-                              environ=environ)
+      environ['SKIP_PIP_INSTALL'] = 'TRUE'
+      return create_jobspec(self.name,
+                            ['tools/run_tests/build_artifact_python.sh'],
+                            environ=environ)
 
   def __str__(self):
     return self.name
@@ -190,6 +205,7 @@ class CSharpExtArtifact:
   def __str__(self):
     return self.name
 
+
 node_gyp_arch_map = {
   'x86': 'ia32',
   'x64': 'x64'
@@ -225,16 +241,81 @@ class NodeExtArtifact:
                               ['tools/run_tests/build_artifact_node.sh',
                                self.gyp_arch])
 
+class PHPArtifact:
+  """Builds PHP PECL package"""
+
+  def __init__(self, platform, arch):
+    self.name = 'php_pecl_package_{0}_{1}'.format(platform, arch)
+    self.platform = platform
+    self.arch = arch
+    self.labels = ['artifact', 'php', platform, arch]
+
+  def pre_build_jobspecs(self):
+    return []
+
+  def build_jobspec(self):
+    return create_docker_jobspec(
+        self.name,
+        'tools/dockerfile/grpc_artifact_linux_{}'.format(self.arch),
+        'tools/run_tests/build_artifact_php.sh')
+
+class ProtocArtifact:
+  """Builds protoc and protoc-plugin artifacts"""
+
+  def __init__(self, platform, arch):
+    self.name = 'protoc_%s_%s' % (platform, arch)
+    self.platform = platform
+    self.arch = arch
+    self.labels = ['artifact', 'protoc', platform, arch]
+
+  def pre_build_jobspecs(self):
+      return []
+
+  def build_jobspec(self):
+    if self.platform != 'windows':
+      cxxflags = '-DNDEBUG %s' % _ARCH_FLAG_MAP[self.arch]
+      ldflags = '%s' % _ARCH_FLAG_MAP[self.arch]
+      if self.platform != 'macos':
+        ldflags += '  -static-libgcc -static-libstdc++ -s'
+      environ={'CONFIG': 'opt',
+               'CXXFLAGS': cxxflags,
+               'LDFLAGS': ldflags,
+               'PROTOBUF_LDFLAGS_EXTRA': ldflags}
+      if self.platform == 'linux':
+        return create_docker_jobspec(self.name,
+            'tools/dockerfile/grpc_artifact_protoc',
+            'tools/run_tests/build_artifact_protoc.sh',
+            environ=environ)
+      else:
+        environ['CXXFLAGS'] += ' -std=c++11 -stdlib=libc++ %s' % _MACOS_COMPAT_FLAG
+        return create_jobspec(self.name,
+            ['tools/run_tests/build_artifact_protoc.sh'],
+            environ=environ)
+    else:
+      generator = 'Visual Studio 12 Win64' if self.arch == 'x64' else 'Visual Studio 12' 
+      vcplatform = 'x64' if self.arch == 'x64' else 'Win32'
+      return create_jobspec(self.name,
+                            ['tools\\run_tests\\build_artifact_protoc.bat'],
+                            environ={'generator': generator,
+                                     'Platform': vcplatform})
+
+  def __str__(self):
+    return self.name
+
 
 def targets():
   """Gets list of supported targets"""
   return ([Cls(platform, arch)
-           for Cls in (CSharpExtArtifact, NodeExtArtifact)
+           for Cls in (CSharpExtArtifact, NodeExtArtifact, ProtocArtifact)
            for platform in ('linux', 'macos', 'windows')
            for arch in ('x86', 'x64')] +
           [PythonArtifact('linux', 'x86'),
            PythonArtifact('linux', 'x64'),
            PythonArtifact('macos', 'x64'),
+           PythonArtifact('windows', 'x86'),
+           PythonArtifact('windows', 'x64'),
            RubyArtifact('linux', 'x86'),
            RubyArtifact('linux', 'x64'),
-           RubyArtifact('macos', 'x64')])
+           RubyArtifact('macos', 'x64'),
+           PHPArtifact('linux', 'x64'),
+           PHPArtifact('macos', 'x64')])
diff --git a/tools/run_tests/build_artifact_php.sh b/tools/run_tests/build_artifact_php.sh
new file mode 100755
index 0000000000000000000000000000000000000000..50bf0ea82159b15ee6f5b691dac0ddcf4147d8f5
--- /dev/null
+++ b/tools/run_tests/build_artifact_php.sh
@@ -0,0 +1,40 @@
+#!/bin/bash
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+PHP_TARGET_ARCH=$1
+set -ex
+
+cd $(dirname $0)/../..
+
+mkdir -p artifacts
+
+pear package
+
+cp -r grpc-*.tgz artifacts/grpc-php.tgz
diff --git a/tools/run_tests/build_artifact_protoc.bat b/tools/run_tests/build_artifact_protoc.bat
new file mode 100644
index 0000000000000000000000000000000000000000..e1dc032188f130e2cf3fee718ed511df69b73802
--- /dev/null
+++ b/tools/run_tests/build_artifact_protoc.bat
@@ -0,0 +1,51 @@
+@rem Copyright 2016, Google Inc.
+@rem All rights reserved.
+@rem
+@rem Redistribution and use in source and binary forms, with or without
+@rem modification, are permitted provided that the following conditions are
+@rem met:
+@rem
+@rem     * Redistributions of source code must retain the above copyright
+@rem notice, this list of conditions and the following disclaimer.
+@rem     * Redistributions in binary form must reproduce the above
+@rem copyright notice, this list of conditions and the following disclaimer
+@rem in the documentation and/or other materials provided with the
+@rem distribution.
+@rem     * Neither the name of Google Inc. nor the names of its
+@rem contributors may be used to endorse or promote products derived from
+@rem this software without specific prior written permission.
+@rem
+@rem THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+@rem "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+@rem LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+@rem A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+@rem OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+@rem SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+@rem LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+@rem DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+@rem THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+@rem (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+@rem OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+mkdir artifacts
+
+setlocal
+cd third_party/protobuf
+
+powershell -Command "Invoke-WebRequest https://googlemock.googlecode.com/files/gmock-1.7.0.zip -OutFile gmock.zip"
+powershell -Command "Add-Type -Assembly 'System.IO.Compression.FileSystem'; [System.IO.Compression.ZipFile]::ExtractToDirectory('gmock.zip', '.');"
+rename gmock-1.7.0 gmock
+
+cd cmake
+cmake -G "%generator%" || goto :error
+endlocal
+
+call vsprojects/build_plugins.bat || goto :error
+
+xcopy /Y third_party\protobuf\cmake\Release\protoc.exe artifacts\ || goto :error
+xcopy /Y vsprojects\Release\*_plugin.exe artifacts\ || xcopy /Y vsprojects\x64\Release\*_plugin.exe artifacts\ || goto :error
+
+goto :EOF
+
+:error
+exit /b 1
\ No newline at end of file
diff --git a/tools/run_tests/build_artifact_protoc.sh b/tools/run_tests/build_artifact_protoc.sh
new file mode 100755
index 0000000000000000000000000000000000000000..161d3a84d6edd81e8aaea1aac055ca381d81f0b3
--- /dev/null
+++ b/tools/run_tests/build_artifact_protoc.sh
@@ -0,0 +1,41 @@
+#!/bin/bash
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Use devtoolset environment that has GCC 4.7 before set -ex
+source scl_source enable devtoolset-1.1
+
+set -ex
+
+cd $(dirname $0)/../..
+
+make plugins
+
+mkdir -p artifacts
+cp bins/opt/protobuf/protoc bins/opt/*_plugin artifacts/
diff --git a/tools/run_tests/build_artifact_python.bat b/tools/run_tests/build_artifact_python.bat
new file mode 100644
index 0000000000000000000000000000000000000000..023d394549425f65f33811f09a1db6f336c90bc6
--- /dev/null
+++ b/tools/run_tests/build_artifact_python.bat
@@ -0,0 +1,61 @@
+@rem Copyright 2016, Google Inc.
+@rem All rights reserved.
+@rem
+@rem Redistribution and use in source and binary forms, with or without
+@rem modification, are permitted provided that the following conditions are
+@rem met:
+@rem
+@rem     * Redistributions of source code must retain the above copyright
+@rem notice, this list of conditions and the following disclaimer.
+@rem     * Redistributions in binary form must reproduce the above
+@rem copyright notice, this list of conditions and the following disclaimer
+@rem in the documentation and/or other materials provided with the
+@rem distribution.
+@rem     * Neither the name of Google Inc. nor the names of its
+@rem contributors may be used to endorse or promote products derived from
+@rem this software without specific prior written permission.
+@rem
+@rem THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+@rem "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+@rem LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+@rem A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+@rem OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+@rem SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+@rem LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+@rem DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+@rem THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+@rem (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+@rem OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+set NUGET=C:\nuget\nuget.exe
+%NUGET% restore vsprojects\grpc.sln || goto :error
+
+
+@call vsprojects\build_vs2013.bat vsprojects\grpc.sln /t:grpc_dll /p:Configuration=Release /p:PlatformToolset=v120 /p:Platform=Win32 || goto :error
+@call vsprojects\build_vs2013.bat vsprojects\grpc.sln /t:grpc_dll /p:Configuration=Release /p:PlatformToolset=v120 /p:Platform=x64   || goto :error
+
+mkdir src\python\grpcio\grpc\_cython\_windows
+
+copy /Y vsprojects\Release\grpc_dll.dll src\python\grpcio\grpc\_cython\_windows\grpc_c.32.python || goto :error
+copy /Y vsprojects\x64\Release\grpc_dll.dll src\python\grpcio\grpc\_cython\_windows\grpc_c.64.python || goto :error
+
+
+set PATH=C:\%1;C:\%1\scripts;%PATH%
+
+pip install --upgrade six
+pip install --upgrade setuptools
+pip install -rrequirements.txt
+
+set GRPC_PYTHON_USE_CUSTOM_BDIST=0
+set GRPC_PYTHON_BUILD_WITH_CYTHON=1
+
+python setup.py bdist_wheel
+
+mkdir artifacts
+xcopy /Y /I /S dist\* artifacts\ || goto :error
+
+goto :EOF
+
+:error
+exit /b 1
diff --git a/tools/run_tests/build_package_php.sh b/tools/run_tests/build_package_php.sh
new file mode 100755
index 0000000000000000000000000000000000000000..56e3319ed9b9b56da0f3d552fc9609a238d8a72b
--- /dev/null
+++ b/tools/run_tests/build_package_php.sh
@@ -0,0 +1,36 @@
+#!/bin/bash
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+set -ex
+
+cd $(dirname $0)/../..
+
+mkdir -p artifacts/
+cp -r $EXTERNAL_GIT_ROOT/architecture={x86,x64},language=php,platform={windows,linux,macos}/artifacts/* artifacts/ || true
diff --git a/tools/run_tests/configs.json b/tools/run_tests/configs.json
index 9d7b8a3c7253c47329ea02d8139ea8299fc0e367..cbb8ec57b6170579e303e3a82d657902c369c302 100644
--- a/tools/run_tests/configs.json
+++ b/tools/run_tests/configs.json
@@ -18,7 +18,7 @@
     "environ": {
       "ASAN_OPTIONS": "detect_leaks=0:color=always"
     }, 
-    "timeout_multiplier": 1.5
+    "timeout_multiplier": 3
   }, 
   {
     "config": "ubsan", 
@@ -48,18 +48,18 @@
       "ASAN_OPTIONS": "detect_leaks=1:color=always", 
       "LSAN_OPTIONS": "suppressions=tools/lsan_suppressions.txt:report_objects=1"
     }, 
-    "timeout_multiplier": 1.5
+    "timeout_multiplier": 3
   }, 
   {
     "config": "tsan", 
     "environ": {
       "TSAN_OPTIONS": "suppressions=tools/tsan_suppressions.txt:halt_on_error=1:second_deadlock_stack=1"
     }, 
-    "timeout_multiplier": 2
+    "timeout_multiplier": 5
   }, 
   {
     "config": "msan", 
-    "timeout_multiplier": 2
+    "timeout_multiplier": 4
   }, 
   {
     "config": "mutrace"
diff --git a/tools/run_tests/distribtest_targets.py b/tools/run_tests/distribtest_targets.py
index 261f44bc6d991f50b029f326222ccbd5babf393e..0c02344d90d6e038bbaa404394f21209f98b9a09 100644
--- a/tools/run_tests/distribtest_targets.py
+++ b/tools/run_tests/distribtest_targets.py
@@ -198,6 +198,33 @@ class RubyDistribTest(object):
     return self.name
 
 
+class PHPDistribTest(object):
+  """Tests PHP package"""
+
+  def __init__(self, platform, arch, docker_suffix):
+    self.name = 'php_%s_%s_%s' % (platform, arch, docker_suffix)
+    self.platform = platform
+    self.arch = arch
+    self.docker_suffix = docker_suffix
+    self.labels = ['distribtest', 'php', platform, arch, docker_suffix]
+
+  def pre_build_jobspecs(self):
+    return []
+
+  def build_jobspec(self):
+    if not self.platform == 'linux':
+      raise Exception("Not supported yet.")
+
+    return create_docker_jobspec(self.name,
+          'tools/dockerfile/distribtest/php_%s_%s' % (
+              self.docker_suffix,
+              self.arch),
+          'test/distrib/php/run_distrib_test.sh')
+
+  def __str__(self):
+    return self.name
+
+
 def targets():
   """Gets list of supported targets"""
   return [CSharpDistribTest('linux', 'x64', 'wheezy'),
@@ -241,7 +268,9 @@ def targets():
           RubyDistribTest('linux', 'x64', 'ubuntu1510'),
           RubyDistribTest('linux', 'x64', 'ubuntu1604'),
           NodeDistribTest('macos', 'x64', None, '4'),
-          NodeDistribTest('linux', 'x86', 'jessie', '4')
+          NodeDistribTest('macos', 'x64', None, '5'),
+          NodeDistribTest('linux', 'x86', 'jessie', '4'),
+          PHPDistribTest('linux', 'x64', 'jessie'),
           ] + [
             NodeDistribTest('linux', 'x64', os, version)
             for os in ('wheezy', 'jessie', 'ubuntu1204', 'ubuntu1404',
diff --git a/tools/run_tests/package_targets.py b/tools/run_tests/package_targets.py
index 4ca8279f1bfa529783b2b2463e582cec7978c7dc..87bc4865ce34e5f8962f1b28e357c750e6351ac2 100644
--- a/tools/run_tests/package_targets.py
+++ b/tools/run_tests/package_targets.py
@@ -139,9 +139,27 @@ class PythonPackage:
         'tools/run_tests/build_package_python.sh')
 
 
+class PHPPackage:
+  """Copy PHP PECL package artifact"""
+
+  def __init__(self):
+    self.name = 'php_package'
+    self.labels = ['package', 'php', 'linux']
+
+  def pre_build_jobspecs(self):
+    return []
+
+  def build_jobspec(self):
+    return create_docker_jobspec(
+        self.name,
+        'tools/dockerfile/grpc_artifact_linux_x64',
+        'tools/run_tests/build_package_php.sh')
+
+
 def targets():
   """Gets list of supported targets"""
   return [CSharpPackage(),
           NodePackage(),
           RubyPackage(),
-          PythonPackage()]
+          PythonPackage(),
+          PHPPackage()]
diff --git a/tools/run_tests/run_interop_tests.py b/tools/run_tests/run_interop_tests.py
index 76be932aeff47b9be1ca993045bfe870f740d4d8..df3ab90a839fad5e10d73847a2f12c3951841809 100755
--- a/tools/run_tests/run_interop_tests.py
+++ b/tools/run_tests/run_interop_tests.py
@@ -422,7 +422,7 @@ def _job_kill_handler(job):
     time.sleep(2)
 
 
-def cloud_to_prod_jobspec(language, test_case, server_host_name, 
+def cloud_to_prod_jobspec(language, test_case, server_host_name,
                           server_host_detail, docker_image=None, auth=False):
   """Creates jobspec for cloud-to-prod interop test"""
   container_name = None
@@ -441,7 +441,7 @@ def cloud_to_prod_jobspec(language, test_case, server_host_name,
   cwd = language.client_cwd
 
   if docker_image:
-    container_name = dockerjob.random_name('interop_client_%s' % 
+    container_name = dockerjob.random_name('interop_client_%s' %
                                            language.safename)
     cmdline = docker_run_cmdline(cmdline,
                                  image=docker_image,
@@ -457,7 +457,7 @@ def cloud_to_prod_jobspec(language, test_case, server_host_name,
           cmdline=cmdline,
           cwd=cwd,
           environ=environ,
-          shortname='%s:%s:%s:%s' % (suite_name, server_host_name, language, 
+          shortname='%s:%s:%s:%s' % (suite_name, server_host_name, language,
                                      test_case),
           timeout_seconds=90,
           flake_retries=5 if args.allow_flakes else 0,
@@ -575,18 +575,18 @@ def aggregate_http2_results(stdout):
     'percent': 1.0 * passed / (passed + failed)
   }
 
-# A dictionary of prod servers to test. 
+# A dictionary of prod servers to test.
 # Format: server_name: (server_host, server_host_override, errors_allowed)
 # TODO(adelez): implement logic for errors_allowed where if the indicated tests
 # fail, they don't impact the overall test result.
 prod_servers = {
-    'default': ('grpc-test.sandbox.googleapis.com', 
+    'default': ('grpc-test.sandbox.googleapis.com',
                 'grpc-test.sandbox.googleapis.com', False),
-    'gateway_v2': ('grpc-test2.sandbox.googleapis.com', 
+    'gateway_v2': ('grpc-test2.sandbox.googleapis.com',
                    'grpc-test2.sandbox.googleapis.com', True),
-    'cloud_gateway': ('216.239.32.255', 'grpc-test.sandbox.googleapis.com', 
+    'cloud_gateway': ('216.239.32.255', 'grpc-test.sandbox.googleapis.com',
                       False),
-    'cloud_gateway_v2': ('216.239.32.255', 'grpc-test2.sandbox.googleapis.com', 
+    'cloud_gateway_v2': ('216.239.32.255', 'grpc-test2.sandbox.googleapis.com',
                          True)
 }
 
@@ -720,7 +720,7 @@ try:
           if not test_case in language.unimplemented_test_cases():
             if not test_case in _SKIP_ADVANCED + _SKIP_COMPRESSION:
               test_job = cloud_to_prod_jobspec(
-                  language, test_case, server_host_name, 
+                  language, test_case, server_host_name,
                   prod_servers[server_host_name],
                   docker_image=docker_images.get(str(language)))
               jobs.append(test_job)
@@ -728,7 +728,7 @@ try:
       if args.http2_interop:
         for test_case in _HTTP2_TEST_CASES:
           test_job = cloud_to_prod_jobspec(
-              http2Interop, test_case, server_host_name, 
+              http2Interop, test_case, server_host_name,
               prod_servers[server_host_name],
               docker_image=docker_images.get(str(http2Interop)))
           jobs.append(test_job)
@@ -739,7 +739,7 @@ try:
         for test_case in _AUTH_TEST_CASES:
           if not test_case in language.unimplemented_test_cases():
             test_job = cloud_to_prod_jobspec(
-                language, test_case, server_host_name, 
+                language, test_case, server_host_name,
                 prod_servers[server_host_name],
                 docker_image=docker_images.get(str(language)), auth=True)
             jobs.append(test_job)
@@ -802,7 +802,7 @@ try:
   report_utils.render_interop_html_report(
       set([str(l) for l in languages]), servers, _TEST_CASES, _AUTH_TEST_CASES,
       _HTTP2_TEST_CASES, resultset, num_failures,
-      args.cloud_to_prod_auth or args.cloud_to_prod, args.prod_servers, 
+      args.cloud_to_prod_auth or args.cloud_to_prod, args.prod_servers,
       args.http2_interop)
 
 finally:
diff --git a/tools/run_tests/run_node.bat b/tools/run_tests/run_node.bat
index f5cf01f0959844c06041468eeb57d3934fe9e7fe..ad9ca14b8b9d5474331bc34f95a6a0e51eb04c1c 100644
--- a/tools/run_tests/run_node.bat
+++ b/tools/run_tests/run_node.bat
@@ -29,4 +29,4 @@
 
 set JUNIT_REPORT_PATH=src\node\reports.xml
 set JUNIT_REPORT_STACK=1
-.\node_modules\.bin\mocha.cmd --reporter mocha-jenkins-reporter src\node\test
\ No newline at end of file
+.\node_modules\.bin\mocha.cmd --reporter mocha-jenkins-reporter --timeout 8000 src\node\test
\ No newline at end of file
diff --git a/tools/run_tests/run_node.sh b/tools/run_tests/run_node.sh
index 40f61d77cc9bec232d2a5337ca4d0bdddb9de107..178584ae8ed59f035b92b409de1a9101fbf53fbc 100755
--- a/tools/run_tests/run_node.sh
+++ b/tools/run_tests/run_node.sh
@@ -41,10 +41,13 @@ cd $(dirname $0)/../..
 
 root=`pwd`
 
+test_directory='src/node/test'
+timeout=8000
+
 if [ "$CONFIG" = "gcov" ]
 then
   ./node_modules/.bin/istanbul cover --dir reports/node_coverage \
-    -x **/interop/* ./node_modules/.bin/_mocha -- --timeout 8000 src/node/test
+    -x **/interop/* ./node_modules/.bin/_mocha -- --timeout $timeout $test_directory
   cd build
   gcov Release/obj.target/grpc/ext/*.o
   lcov --base-directory . --directory . -c -o coverage.info
@@ -55,5 +58,7 @@ then
   echo '<html><head><meta http-equiv="refresh" content="0;URL=lcov-report/index.html"></head></html>' > \
     ../reports/node_coverage/index.html
 else
-  JUNIT_REPORT_PATH=src/node/reports.xml JUNIT_REPORT_STACK=1 ./node_modules/.bin/mocha --reporter mocha-jenkins-reporter src/node/test
+  JUNIT_REPORT_PATH=src/node/reports.xml JUNIT_REPORT_STACK=1 \
+    ./node_modules/.bin/mocha --timeout $timeout \
+    --reporter mocha-jenkins-reporter $test_directory
 fi
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index de3716bc887e743c2fa42cbb751ee3c18a21e3f2..7b2bc537162a1d0bee7110a12b4112bd2c85a108 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -55,8 +55,8 @@ import report_utils
 import watch_dirs
 
 
-ROOT = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../..'))
-os.chdir(ROOT)
+_ROOT = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../..'))
+os.chdir(_ROOT)
 
 
 _FORCE_ENVIRON_FOR_WRAPPERS = {}
@@ -118,6 +118,16 @@ def get_c_tests(travis, test_lang) :
                 not (travis and tgt['flaky'])]
 
 
+def _check_compiler(compiler, supported_compilers):
+  if compiler not in supported_compilers:
+    raise Exception('Compiler %s not supported.' % compiler)
+
+
+def _is_use_docker_child():
+  """Returns True if running running as a --use_docker child."""
+  return True if os.getenv('RUN_TESTS_COMMAND') else False
+
+
 class CLanguage(object):
 
   def __init__(self, make_target, test_lang):
@@ -125,44 +135,55 @@ class CLanguage(object):
     self.platform = platform_string()
     self.test_lang = test_lang
 
-  def test_specs(self, config, args):
+  def configure(self, config, args):
+    self.config = config
+    self.args = args
+    if self.platform == 'windows':
+      self._make_options = [_windows_toolset_option(self.args.compiler),
+                            _windows_arch_option(self.args.arch)]
+    else:
+      self._make_options = []
+      self._docker_distro = self._get_docker_distro(self.args.use_docker,
+                                                    self.args.compiler)
+
+  def test_specs(self):
     out = []
-    binaries = get_c_tests(args.travis, self.test_lang)
+    binaries = get_c_tests(self.args.travis, self.test_lang)
     for target in binaries:
-      if config.build_config in target['exclude_configs']:
+      if self.config.build_config in target['exclude_configs']:
         continue
       if self.platform == 'windows':
         binary = 'vsprojects/%s%s/%s.exe' % (
-            'x64/' if args.arch == 'x64' else '',
-            _WINDOWS_CONFIG[config.build_config],
+            'x64/' if self.args.arch == 'x64' else '',
+            _MSBUILD_CONFIG[self.config.build_config],
             target['name'])
       else:
-        binary = 'bins/%s/%s' % (config.build_config, target['name'])
+        binary = 'bins/%s/%s' % (self.config.build_config, target['name'])
       if os.path.isfile(binary):
         cmdline = [binary] + target['args']
-        out.append(config.job_spec(cmdline, [binary],
-                                   shortname=' '.join(cmdline),
-                                   cpu_cost=target['cpu_cost'],
-                                   environ={'GRPC_DEFAULT_SSL_ROOTS_FILE_PATH':
-                                            os.path.abspath(os.path.dirname(
-                                                sys.argv[0]) + '/../../src/core/tsi/test_creds/ca.pem')}))
-      elif args.regex == '.*' or platform_string() == 'windows':
+        out.append(self.config.job_spec(cmdline, [binary],
+                                        shortname=' '.join(cmdline),
+                                        cpu_cost=target['cpu_cost'],
+                                        environ={'GRPC_DEFAULT_SSL_ROOTS_FILE_PATH':
+                                                 _ROOT + '/src/core/tsi/test_creds/ca.pem'}))
+      elif self.args.regex == '.*' or self.platform == 'windows':
         print '\nWARNING: binary not found, skipping', binary
     return sorted(out)
 
-  def make_targets(self, test_regex):
-    if platform_string() != 'windows' and test_regex != '.*':
+  def make_targets(self):
+    test_regex = self.args.regex
+    if self.platform != 'windows' and self.args.regex != '.*':
       # use the regex to minimize the number of things to build
       return [os.path.basename(target['name'])
               for target in get_c_tests(False, self.test_lang)
               if re.search(test_regex, '/' + target['name'])]
-    if platform_string() == 'windows':
+    if self.platform == 'windows':
       # don't build tools on windows just yet
       return ['buildtests_%s' % self.make_target]
     return ['buildtests_%s' % self.make_target, 'tools_%s' % self.make_target]
 
   def make_options(self):
-    return []
+    return self._make_options;
 
   def pre_build_steps(self):
     if self.platform == 'windows':
@@ -182,11 +203,24 @@ class CLanguage(object):
   def makefile_name(self):
     return 'Makefile'
 
-  def supports_multi_config(self):
-    return True
+  def _get_docker_distro(self, use_docker, compiler):
+    if _is_use_docker_child():
+      return "already_under_docker"
+    if not use_docker:
+      _check_compiler(compiler, ['default'])
+
+    if compiler == 'gcc4.9' or compiler == 'default':
+      return 'jessie'
+    elif compiler == 'gcc4.4':
+      return 'squeeze'
+    elif compiler == 'gcc5.3':
+      return 'ubuntu1604'
+    else:
+      raise Exception('Compiler %s not supported.' % compiler)
 
-  def dockerfile_dir(self, config, arch):
-    return 'tools/dockerfile/test/cxx_jessie_%s' % _docker_arch_suffix(arch)
+  def dockerfile_dir(self):
+    return 'tools/dockerfile/test/cxx_%s_%s' % (self._docker_distro,
+                                                _docker_arch_suffix(self.args.arch))
 
   def __str__(self):
     return self.make_target
@@ -198,13 +232,18 @@ class NodeLanguage(object):
     self.platform = platform_string()
     self.node_version = '0.12'
 
-  def test_specs(self, config, args):
+  def configure(self, config, args):
+    self.config = config
+    self.args = args
+    _check_compiler(self.args.compiler, ['default'])
+
+  def test_specs(self):
     if self.platform == 'windows':
-      return [config.job_spec(['tools\\run_tests\\run_node.bat'], None)]
+      return [self.config.job_spec(['tools\\run_tests\\run_node.bat'], None)]
     else:
-      return [config.job_spec(['tools/run_tests/run_node.sh', self.node_version],
-                              None,
-                              environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
+      return [self.config.job_spec(['tools/run_tests/run_node.sh', self.node_version],
+                                   None,
+                                   environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
 
   def pre_build_steps(self):
     if self.platform == 'windows':
@@ -212,7 +251,7 @@ class NodeLanguage(object):
     else:
       return [['tools/run_tests/pre_build_node.sh', self.node_version]]
 
-  def make_targets(self, test_regex):
+  def make_targets(self):
     return []
 
   def make_options(self):
@@ -230,11 +269,8 @@ class NodeLanguage(object):
   def makefile_name(self):
     return 'Makefile'
 
-  def supports_multi_config(self):
-    return False
-
-  def dockerfile_dir(self, config, arch):
-    return 'tools/dockerfile/test/node_jessie_%s' % _docker_arch_suffix(arch)
+  def dockerfile_dir(self):
+    return 'tools/dockerfile/test/node_jessie_%s' % _docker_arch_suffix(self.args.arch)
 
   def __str__(self):
     return 'node'
@@ -242,14 +278,19 @@ class NodeLanguage(object):
 
 class PhpLanguage(object):
 
-  def test_specs(self, config, args):
-    return [config.job_spec(['src/php/bin/run_tests.sh'], None,
-                            environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
+  def configure(self, config, args):
+    self.config = config
+    self.args = args
+    _check_compiler(self.args.compiler, ['default'])
+
+  def test_specs(self):
+    return [self.config.job_spec(['src/php/bin/run_tests.sh'], None,
+                                  environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
 
   def pre_build_steps(self):
     return []
 
-  def make_targets(self, test_regex):
+  def make_targets(self):
     return ['static_c', 'shared_c']
 
   def make_options(self):
@@ -264,11 +305,8 @@ class PhpLanguage(object):
   def makefile_name(self):
     return 'Makefile'
 
-  def supports_multi_config(self):
-    return False
-
-  def dockerfile_dir(self, config, arch):
-    return 'tools/dockerfile/test/php_jessie_%s' % _docker_arch_suffix(arch)
+  def dockerfile_dir(self):
+    return 'tools/dockerfile/test/php_jessie_%s' % _docker_arch_suffix(self.args.arch)
 
   def __str__(self):
     return 'php'
@@ -280,10 +318,15 @@ class PythonLanguage(object):
     self._build_python_versions = ['2.7']
     self._has_python_versions = []
 
-  def test_specs(self, config, args):
+  def configure(self, config, args):
+    self.config = config
+    self.args = args
+    _check_compiler(self.args.compiler, ['default'])
+
+  def test_specs(self):
     environment = dict(_FORCE_ENVIRON_FOR_WRAPPERS)
     environment['PYVER'] = '2.7'
-    return [config.job_spec(
+    return [self.config.job_spec(
         ['tools/run_tests/run_python.sh'],
         None,
         environ=environment,
@@ -294,7 +337,7 @@ class PythonLanguage(object):
   def pre_build_steps(self):
     return []
 
-  def make_targets(self, test_regex):
+  def make_targets(self):
     return ['static_c', 'grpc_python_plugin', 'shared_c']
 
   def make_options(self):
@@ -320,11 +363,8 @@ class PythonLanguage(object):
   def makefile_name(self):
     return 'Makefile'
 
-  def supports_multi_config(self):
-    return False
-
-  def dockerfile_dir(self, config, arch):
-    return 'tools/dockerfile/test/python_jessie_%s' % _docker_arch_suffix(arch)
+  def dockerfile_dir(self):
+    return 'tools/dockerfile/test/python_jessie_%s' % _docker_arch_suffix(self.args.arch)
 
   def __str__(self):
     return 'python'
@@ -332,15 +372,21 @@ class PythonLanguage(object):
 
 class RubyLanguage(object):
 
-  def test_specs(self, config, args):
-    return [config.job_spec(['tools/run_tests/run_ruby.sh'], None,
-                            environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
+  def configure(self, config, args):
+    self.config = config
+    self.args = args
+    _check_compiler(self.args.compiler, ['default'])
+
+  def test_specs(self):
+    return [self.config.job_spec(['tools/run_tests/run_ruby.sh'], None,
+                                 timeout_seconds=10*60,
+                                 environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
 
   def pre_build_steps(self):
     return [['tools/run_tests/pre_build_ruby.sh']]
 
-  def make_targets(self, test_regex):
-    return ['static_c']
+  def make_targets(self):
+    return []
 
   def make_options(self):
     return []
@@ -354,27 +400,30 @@ class RubyLanguage(object):
   def makefile_name(self):
     return 'Makefile'
 
-  def supports_multi_config(self):
-    return False
-
-  def dockerfile_dir(self, config, arch):
-    return 'tools/dockerfile/test/ruby_jessie_%s' % _docker_arch_suffix(arch)
+  def dockerfile_dir(self):
+    return 'tools/dockerfile/test/ruby_jessie_%s' % _docker_arch_suffix(self.args.arch)
 
   def __str__(self):
     return 'ruby'
 
 
 class CSharpLanguage(object):
+
   def __init__(self):
     self.platform = platform_string()
 
-  def test_specs(self, config, args):
+  def configure(self, config, args):
+    self.config = config
+    self.args = args
+    _check_compiler(self.args.compiler, ['default'])
+
+  def test_specs(self):
     with open('src/csharp/tests.json') as f:
       tests_json = json.load(f)
     assemblies = tests_json['assemblies']
     tests = tests_json['tests']
 
-    msbuild_config = _WINDOWS_CONFIG[config.build_config]
+    msbuild_config = _MSBUILD_CONFIG[self.config.build_config]
     assembly_files = ['%s/bin/%s/%s.dll' % (a, msbuild_config, a)
                       for a in assemblies]
 
@@ -386,13 +435,13 @@ class CSharpLanguage(object):
     else:
       script_name = 'tools/run_tests/run_csharp.sh'
 
-    if config.build_config == 'gcov':
+    if self.config.build_config == 'gcov':
       # On Windows, we only collect C# code coverage.
       # On Linux, we only collect coverage for native extension.
       # For code coverage all tests need to run as one suite.
-      return [config.job_spec([script_name] + extra_args, None,
-                              shortname='csharp.coverage',
-                              environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
+      return [self.config.job_spec([script_name] + extra_args, None,
+                                    shortname='csharp.coverage',
+                                    environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
     else:
       specs = []
       for test in tests:
@@ -401,9 +450,9 @@ class CSharpLanguage(object):
           # use different output directory for each test to prevent
           # TestResult.xml clash between parallel test runs.
           cmdline += ['-work=test-result/%s' % uuid.uuid4()]
-        specs.append(config.job_spec(cmdline, None,
-                                     shortname='csharp.%s' % test,
-                                     environ=_FORCE_ENVIRON_FOR_WRAPPERS))
+        specs.append(self.config.job_spec(cmdline, None,
+                                          shortname='csharp.%s' % test,
+                                          environ=_FORCE_ENVIRON_FOR_WRAPPERS))
       return specs
 
   def pre_build_steps(self):
@@ -412,7 +461,7 @@ class CSharpLanguage(object):
     else:
       return [['tools/run_tests/pre_build_csharp.sh']]
 
-  def make_targets(self, test_regex):
+  def make_targets(self):
     # For Windows, this target doesn't really build anything,
     # everything is build by buildall script later.
     if self.platform == 'windows':
@@ -439,11 +488,8 @@ class CSharpLanguage(object):
   def makefile_name(self):
     return 'Makefile'
 
-  def supports_multi_config(self):
-    return False
-
-  def dockerfile_dir(self, config, arch):
-    return 'tools/dockerfile/test/csharp_jessie_%s' % _docker_arch_suffix(arch)
+  def dockerfile_dir(self):
+    return 'tools/dockerfile/test/csharp_jessie_%s' % _docker_arch_suffix(self.args.arch)
 
   def __str__(self):
     return 'csharp'
@@ -451,14 +497,19 @@ class CSharpLanguage(object):
 
 class ObjCLanguage(object):
 
-  def test_specs(self, config, args):
-    return [config.job_spec(['src/objective-c/tests/run_tests.sh'], None,
-                            environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
+  def configure(self, config, args):
+    self.config = config
+    self.args = args
+    _check_compiler(self.args.compiler, ['default'])
+
+  def test_specs(self):
+    return [self.config.job_spec(['src/objective-c/tests/run_tests.sh'], None,
+                                  environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
 
   def pre_build_steps(self):
     return []
 
-  def make_targets(self, test_regex):
+  def make_targets(self):
     return ['grpc_objective_c_plugin', 'interop_server']
 
   def make_options(self):
@@ -473,10 +524,7 @@ class ObjCLanguage(object):
   def makefile_name(self):
     return 'Makefile'
 
-  def supports_multi_config(self):
-    return False
-
-  def dockerfile_dir(self, config, arch):
+  def dockerfile_dir(self):
     return None
 
   def __str__(self):
@@ -485,18 +533,23 @@ class ObjCLanguage(object):
 
 class Sanity(object):
 
-  def test_specs(self, config, args):
+  def configure(self, config, args):
+    self.config = config
+    self.args = args
+    _check_compiler(self.args.compiler, ['default'])
+
+  def test_specs(self):
     import yaml
     with open('tools/run_tests/sanity/sanity_tests.yaml', 'r') as f:
-      return [config.job_spec(cmd['script'].split(), None,
-                              timeout_seconds=None, environ={'TEST': 'true'},
-                              cpu_cost=cmd.get('cpu_cost', 1))
+      return [self.config.job_spec(cmd['script'].split(), None,
+                                   timeout_seconds=None, environ={'TEST': 'true'},
+                                   cpu_cost=cmd.get('cpu_cost', 1))
               for cmd in yaml.load(f)]
 
   def pre_build_steps(self):
     return []
 
-  def make_targets(self, test_regex):
+  def make_targets(self):
     return ['run_dep_checks']
 
   def make_options(self):
@@ -511,55 +564,18 @@ class Sanity(object):
   def makefile_name(self):
     return 'Makefile'
 
-  def supports_multi_config(self):
-    return False
-
-  def dockerfile_dir(self, config, arch):
+  def dockerfile_dir(self):
     return 'tools/dockerfile/test/sanity'
 
   def __str__(self):
     return 'sanity'
 
 
-class Build(object):
-
-  def test_specs(self, config, args):
-    return []
-
-  def pre_build_steps(self):
-    return []
-
-  def make_targets(self, test_regex):
-    return ['static']
-
-  def make_options(self):
-    return []
-
-  def build_steps(self):
-    return []
-
-  def post_tests_steps(self):
-    return []
-
-  def makefile_name(self):
-    return 'Makefile'
-
-  def supports_multi_config(self):
-    return True
-
-  def dockerfile_dir(self, config, arch):
-    return None
-
-  def __str__(self):
-    return self.make_target
-
-
 # different configurations we can run under
 with open('tools/run_tests/configs.json') as f:
   _CONFIGS = dict((cfg['config'], Config(**cfg)) for cfg in ast.literal_eval(f.read()))
 
 
-_DEFAULT = ['opt']
 _LANGUAGES = {
     'c++': CLanguage('cxx', 'c++'),
     'c': CLanguage('c', 'c'),
@@ -569,11 +585,11 @@ _LANGUAGES = {
     'ruby': RubyLanguage(),
     'csharp': CSharpLanguage(),
     'objc' : ObjCLanguage(),
-    'sanity': Sanity(),
-    'build': Build(),
+    'sanity': Sanity()
     }
 
-_WINDOWS_CONFIG = {
+
+_MSBUILD_CONFIG = {
     'dbg': 'Debug',
     'opt': 'Release',
     'gcov': 'Debug',
@@ -650,14 +666,6 @@ def _docker_arch_suffix(arch):
     sys.exit(1)
 
 
-def _get_dockerfile_dir(language, cfg, arch):
-  """Returns dockerfile to use"""
-  custom = language.dockerfile_dir(cfg, arch)
-  if custom:
-    return custom
-  else:
-    return 'tools/dockerfile/grpc_tests_multilang_%s' % _docker_arch_suffix(arch)
-
 def runs_per_test_type(arg_str):
     """Auxilary function to parse the "runs_per_test" flag.
 
@@ -681,9 +689,8 @@ def runs_per_test_type(arg_str):
 # parse command line
 argp = argparse.ArgumentParser(description='Run grpc tests.')
 argp.add_argument('-c', '--config',
-                  choices=['all'] + sorted(_CONFIGS.keys()),
-                  nargs='+',
-                  default=_DEFAULT)
+                  choices=sorted(_CONFIGS.keys()),
+                  default='opt')
 argp.add_argument('-n', '--runs_per_test', default=1, type=runs_per_test_type,
         help='A positive integer or "inf". If "inf", all tests will run in an '
              'infinite loop. Especially useful in combination with "-f"')
@@ -727,9 +734,11 @@ argp.add_argument('--arch',
                   default='default',
                   help='Selects architecture to target. For some platforms "default" is the only supported choice.')
 argp.add_argument('--compiler',
-                  choices=['default', 'vs2010', 'vs2013', 'vs2015'],
+                  choices=['default',
+                           'gcc4.4', 'gcc4.9', 'gcc5.3',
+                           'vs2010', 'vs2013', 'vs2015'],
                   default='default',
-                  help='Selects compiler to use. For some platforms "default" is the only supported choice.')
+                  help='Selects compiler to use. Allowed values depend on the platform and language.')
 argp.add_argument('--build_only',
                   default=False,
                   action='store_const',
@@ -775,11 +784,8 @@ if need_to_regenerate_projects:
 
 
 # grab config
-run_configs = set(_CONFIGS[cfg]
-                  for cfg in itertools.chain.from_iterable(
-                      _CONFIGS.iterkeys() if x == 'all' else [x]
-                      for x in args.config))
-build_configs = set(cfg.build_config for cfg in run_configs)
+run_config = _CONFIGS[args.config]
+build_config = run_config.build_config
 
 if args.travis:
   _FORCE_ENVIRON_FOR_WRAPPERS = {'GRPC_TRACE': 'api'}
@@ -790,17 +796,13 @@ else:
   lang_list = args.language
 # We don't support code coverage on some languages
 if 'gcov' in args.config:
-  for bad in ['objc', 'sanity', 'build']:
+  for bad in ['objc', 'sanity']:
     if bad in lang_list:
       lang_list.remove(bad)
 
 languages = set(_LANGUAGES[l] for l in lang_list)
-
-if len(build_configs) > 1:
-  for language in languages:
-    if not language.supports_multi_config():
-      print language, 'does not support multiple build configurations'
-      sys.exit(1)
+for l in languages:
+  l.configure(run_config, args)
 
 language_make_options=[]
 if any(language.make_options() for language in languages):
@@ -810,10 +812,6 @@ if any(language.make_options() for language in languages):
   else:
     language_make_options = next(iter(languages)).make_options()
 
-if len(languages) != 1 or len(build_configs) != 1:
-  print 'Multi-language and multi-config testing is not supported.'
-  sys.exit(1)
-
 if args.use_docker:
   if not args.travis:
     print 'Seen --use_docker flag, will run tests under docker.'
@@ -823,14 +821,18 @@ if args.use_docker:
     print 'copied to the docker environment.'
     time.sleep(5)
 
+  dockerfile_dirs = set([l.dockerfile_dir() for l in languages])
+  if len(dockerfile_dirs) > 1:
+    print 'Languages to be tested require running under different docker images.'
+    sys.exit(1)
+  dockerfile_dir = next(iter(dockerfile_dirs))
+
   child_argv = [ arg for arg in sys.argv if not arg == '--use_docker' ]
   run_tests_cmd = 'python tools/run_tests/run_tests.py %s' % ' '.join(child_argv[1:])
 
   env = os.environ.copy()
   env['RUN_TESTS_COMMAND'] = run_tests_cmd
-  env['DOCKERFILE_DIR'] = _get_dockerfile_dir(next(iter(languages)),
-                                              next(iter(build_configs)),
-                                              args.arch)
+  env['DOCKERFILE_DIR'] = dockerfile_dir
   env['DOCKER_RUN_SCRIPT'] = 'tools/jenkins/docker_run_tests.sh'
   if args.xml_report:
     env['XML_REPORT'] = args.xml_report
@@ -842,10 +844,6 @@ if args.use_docker:
                         env=env)
   sys.exit(0)
 
-if platform_string() != 'windows' and args.compiler != 'default':
-    print 'Compiler %s not supported on current platform.' % args.compiler
-    sys.exit(1)
-
 _check_arch_option(args.arch)
 
 def make_jobspec(cfg, targets, makefile='Makefile'):
@@ -860,9 +858,7 @@ def make_jobspec(cfg, targets, makefile='Makefile'):
     return [
       jobset.JobSpec([_windows_build_bat(args.compiler),
                       'vsprojects\\%s.sln' % target,
-                      '/p:Configuration=%s' % _WINDOWS_CONFIG[cfg],
-                      _windows_toolset_option(args.compiler),
-                      _windows_arch_option(args.arch)] +
+                      '/p:Configuration=%s' % _MSBUILD_CONFIG[cfg]] +
                       extra_args +
                       language_make_options,
                       shell=True, timeout_seconds=None)
@@ -885,32 +881,29 @@ make_targets = {}
 for l in languages:
   makefile = l.makefile_name()
   make_targets[makefile] = make_targets.get(makefile, set()).union(
-      set(l.make_targets(args.regex)))
+      set(l.make_targets()))
 
 def build_step_environ(cfg):
   environ = {'CONFIG': cfg}
-  msbuild_cfg = _WINDOWS_CONFIG.get(cfg)
+  msbuild_cfg = _MSBUILD_CONFIG.get(cfg)
   if msbuild_cfg:
     environ['MSBUILD_CONFIG'] = msbuild_cfg
   return environ
 
 build_steps = list(set(
-                   jobset.JobSpec(cmdline, environ=build_step_environ(cfg), flake_retries=5)
-                   for cfg in build_configs
+                   jobset.JobSpec(cmdline, environ=build_step_environ(build_config), flake_retries=5)
                    for l in languages
                    for cmdline in l.pre_build_steps()))
 if make_targets:
-  make_commands = itertools.chain.from_iterable(make_jobspec(cfg, list(targets), makefile) for cfg in build_configs for (makefile, targets) in make_targets.iteritems())
+  make_commands = itertools.chain.from_iterable(make_jobspec(build_config, list(targets), makefile) for (makefile, targets) in make_targets.iteritems())
   build_steps.extend(set(make_commands))
 build_steps.extend(set(
-                   jobset.JobSpec(cmdline, environ=build_step_environ(cfg), timeout_seconds=None)
-                   for cfg in build_configs
+                   jobset.JobSpec(cmdline, environ=build_step_environ(build_config), timeout_seconds=None)
                    for l in languages
                    for cmdline in l.build_steps()))
 
 post_tests_steps = list(set(
-                        jobset.JobSpec(cmdline, environ=build_step_environ(cfg))
-                        for cfg in build_configs
+                        jobset.JobSpec(cmdline, environ=build_step_environ(build_config))
                         for l in languages
                         for cmdline in l.post_tests_steps()))
 runs_per_test = args.runs_per_test
@@ -1023,7 +1016,7 @@ def _start_port_server(port_server_port):
           print 'last ditch attempt to contact port server succeeded'
           break
         except:
-          traceback.print_exc();
+          traceback.print_exc()
           port_log = open(logfile, 'r').read()
           print port_log
           sys.exit(1)
@@ -1043,7 +1036,7 @@ def _start_port_server(port_server_port):
         time.sleep(1)
         waits += 1
       except:
-        traceback.print_exc();
+        traceback.print_exc()
         port_server.kill()
         raise
 
@@ -1101,9 +1094,8 @@ def _build_and_run(
     infinite_runs = runs_per_test == 0
     one_run = set(
       spec
-      for config in run_configs
       for language in languages
-      for spec in language.test_specs(config, args)
+      for spec in language.test_specs()
       if re.search(args.regex, spec.shortname))
     # When running on travis, we want out test runs to be as similar as possible
     # for reproducibility purposes.
@@ -1197,4 +1189,3 @@ else:
   if BuildAndRunError.POST_TEST in errors:
     exit_code |= 4
   sys.exit(exit_code)
-
diff --git a/tools/run_tests/sanity/check_submodules.sh b/tools/run_tests/sanity/check_submodules.sh
index f49230e49aa44cc3de8ea83be8bb49bbe81240c0..3c6dbb9ea1f1a18f51b33c8d889c901496d12153 100755
--- a/tools/run_tests/sanity/check_submodules.sh
+++ b/tools/run_tests/sanity/check_submodules.sh
@@ -44,6 +44,7 @@ cat << EOF | awk '{ print $1 }' | sort > $want_submodules
  9f897b25800d2f54f5c442ef01a60721aeca6d87 third_party/boringssl (version_for_cocoapods_1.0-67-g9f897b2)
  05b155ff59114735ec8cd089f669c4c3d8f59029 third_party/gflags (v2.1.0-45-g05b155f)
  c99458533a9b4c743ed51537e25989ea55944908 third_party/googletest (release-1.7.0)
+ f8ac463766281625ad710900479130c7fcb4d63b third_party/nanopb (nanopb-0.3.4-29-gf8ac463)
  d5fb408ddc281ffcadeb08699e65bb694656d0bd third_party/protobuf (v3.0.0-beta-2)
  50893291621658f355bc5b4d450a8d06a563053d third_party/zlib (v1.2.8)
 EOF
diff --git a/tools/run_tests/sanity/check_version.py b/tools/run_tests/sanity/check_version.py
new file mode 100755
index 0000000000000000000000000000000000000000..41dd5efe3887fde41b69aa70e2add1d876ec4161
--- /dev/null
+++ b/tools/run_tests/sanity/check_version.py
@@ -0,0 +1,97 @@
+#!/usr/bin/env python2.7
+
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import sys
+import yaml
+import os
+import re
+import subprocess
+
+errors = 0
+
+os.chdir(os.path.join(os.path.dirname(sys.argv[0]), '../../..'))
+
+# hack import paths to pick up extra code
+sys.path.insert(0, os.path.abspath('tools/buildgen/plugins'))
+from expand_version import Version
+
+try:
+  branch_name = subprocess.check_output(
+    'git rev-parse --abbrev-ref HEAD',
+    shell=True)
+except:
+  print 'WARNING: not a git repository'
+  branch_name = None
+
+if branch_name is not None:
+  m = re.match(r'^release-([0-9]+)_([0-9]+)$', branch_name)
+  if m:
+    print 'RELEASE branch'
+    # version number should align with the branched version
+    check_version = lambda version: (
+      version.major == int(m.group(1)) and
+      version.minor == int(m.group(2)))
+    warning = 'Version key "%%s" value "%%s" should have a major version %s and minor version %s' % (m.group(1), m.group(2))
+  elif re.match(r'^debian/.*$', branch_name):
+    # no additional version checks for debian branches
+    check_version = lambda version: True
+  else:
+    # all other branches should have a -dev tag
+    check_version = lambda version: version.tag == 'dev'
+    warning = 'Version key "%s" value "%s" should have a -dev tag'
+else:
+  check_version = lambda version: True
+
+with open('build.yaml', 'r') as f:
+  build_yaml = yaml.load(f.read())
+
+settings = build_yaml['settings']
+
+top_version = Version(settings['version'])
+if not check_version(top_version):
+  errors += 1
+  print warning % ('version', top_version)
+
+for tag, value in settings.iteritems():
+  if re.match(r'^[a-z]+_version$', tag):
+    value = Version(value)
+    if value.major != top_version.major:
+      errors += 1
+      print 'major version mismatch on %s: %d vs %d' % (tag, value.major, top_version.major)
+    if value.minor != top_version.minor:
+      errors += 1
+      print 'minor version mismatch on %s: %d vs %d' % (tag, value.minor, top_version.minor)
+    if not check_version(value):
+      errors += 1
+      print warning % (tag, value)
+
+sys.exit(errors)
+
diff --git a/tools/run_tests/sanity/sanity_tests.yaml b/tools/run_tests/sanity/sanity_tests.yaml
index 809e6ce645414fe527b9112c4dc1c5d715c1f592..cffc180fb07d90a3dc481ff9dc30d569b874518b 100644
--- a/tools/run_tests/sanity/sanity_tests.yaml
+++ b/tools/run_tests/sanity/sanity_tests.yaml
@@ -1,9 +1,11 @@
 # a set of tests that are run in parallel for sanity tests
+- script: tools/run_tests/sanity/check_cache_mk.sh
 - script: tools/run_tests/sanity/check_sources_and_headers.py
 - script: tools/run_tests/sanity/check_submodules.sh
-- script: tools/run_tests/sanity/check_cache_mk.sh
+- script: tools/run_tests/sanity/check_version.py
 - script: tools/buildgen/generate_projects.sh -j 3
   cpu_cost: 3
 - script: tools/distrib/check_copyright.py
 - script: tools/distrib/clang_format_code.sh
 - script: tools/distrib/check_trailing_newlines.sh
+- script: tools/distrib/check_nanopb_output.sh
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index ca8a514742883e50cd54ef02aadf5da474c7fe47..88e7343399f226b5e975eee41d108330db5c1310 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -92,7 +92,7 @@
     "language": "c", 
     "name": "census_log_test", 
     "src": [
-      "test/core/census/log_test.c"
+      "test/core/census/mlog_test.c"
     ]
   }, 
   {
@@ -1658,6 +1658,23 @@
       "src/compiler/ruby_plugin.cc"
     ]
   }, 
+  {
+    "deps": [
+      "grpc", 
+      "grpc++", 
+      "grpc++_test_util", 
+      "grpc_test_util"
+    ], 
+    "headers": [
+      "src/proto/grpc/lb/v0/load_balancer.grpc.pb.h", 
+      "src/proto/grpc/lb/v0/load_balancer.pb.h"
+    ], 
+    "language": "c++", 
+    "name": "grpclb_api_test", 
+    "src": [
+      "test/cpp/grpclb/grpclb_api_test.cc"
+    ]
+  }, 
   {
     "deps": [
       "gpr", 
@@ -2983,7 +3000,7 @@
       "include/grpc/status.h", 
       "src/core/census/aggregation.h", 
       "src/core/census/grpc_filter.h", 
-      "src/core/census/log.h", 
+      "src/core/census/mlog.h", 
       "src/core/census/rpc_metric_id.h", 
       "src/core/channel/channel_args.h", 
       "src/core/channel/channel_stack.h", 
@@ -2998,6 +3015,7 @@
       "src/core/client_config/client_config.h", 
       "src/core/client_config/connector.h", 
       "src/core/client_config/initial_connect_string.h", 
+      "src/core/client_config/lb_policies/load_balancer_api.h", 
       "src/core/client_config/lb_policies/pick_first.h", 
       "src/core/client_config/lb_policies/round_robin.h", 
       "src/core/client_config/lb_policy.h", 
@@ -3058,6 +3076,7 @@
       "src/core/json/json_common.h", 
       "src/core/json/json_reader.h", 
       "src/core/json/json_writer.h", 
+      "src/core/proto/grpc/lb/v0/load_balancer.pb.h", 
       "src/core/security/auth_filters.h", 
       "src/core/security/base64.h", 
       "src/core/security/credentials.h", 
@@ -3110,7 +3129,11 @@
       "src/core/tsi/ssl_transport_security.h", 
       "src/core/tsi/ssl_types.h", 
       "src/core/tsi/transport_security.h", 
-      "src/core/tsi/transport_security_interface.h"
+      "src/core/tsi/transport_security_interface.h", 
+      "third_party/nanopb/pb.h", 
+      "third_party/nanopb/pb_common.h", 
+      "third_party/nanopb/pb_decode.h", 
+      "third_party/nanopb/pb_encode.h"
     ], 
     "language": "c", 
     "name": "grpc", 
@@ -3134,8 +3157,8 @@
       "src/core/census/grpc_filter.c", 
       "src/core/census/grpc_filter.h", 
       "src/core/census/initialize.c", 
-      "src/core/census/log.c", 
-      "src/core/census/log.h", 
+      "src/core/census/mlog.c", 
+      "src/core/census/mlog.h", 
       "src/core/census/operation.c", 
       "src/core/census/placeholders.c", 
       "src/core/census/rpc_metric_id.h", 
@@ -3166,6 +3189,8 @@
       "src/core/client_config/default_initial_connect_string.c", 
       "src/core/client_config/initial_connect_string.c", 
       "src/core/client_config/initial_connect_string.h", 
+      "src/core/client_config/lb_policies/load_balancer_api.c", 
+      "src/core/client_config/lb_policies/load_balancer_api.h", 
       "src/core/client_config/lb_policies/pick_first.c", 
       "src/core/client_config/lb_policies/pick_first.h", 
       "src/core/client_config/lb_policies/round_robin.c", 
@@ -3291,6 +3316,8 @@
       "src/core/json/json_string.c", 
       "src/core/json/json_writer.c", 
       "src/core/json/json_writer.h", 
+      "src/core/proto/grpc/lb/v0/load_balancer.pb.c", 
+      "src/core/proto/grpc/lb/v0/load_balancer.pb.h", 
       "src/core/security/auth_filters.h", 
       "src/core/security/base64.c", 
       "src/core/security/base64.h", 
@@ -3415,6 +3442,16 @@
       "src/core/tsi/transport_security_interface.h"
     ]
   }, 
+  {
+    "deps": [
+      "gpr", 
+      "grpc"
+    ], 
+    "headers": [], 
+    "language": "c", 
+    "name": "grpc_dll", 
+    "src": []
+  }, 
   {
     "deps": [
       "gpr", 
@@ -3512,7 +3549,7 @@
       "include/grpc/status.h", 
       "src/core/census/aggregation.h", 
       "src/core/census/grpc_filter.h", 
-      "src/core/census/log.h", 
+      "src/core/census/mlog.h", 
       "src/core/census/rpc_metric_id.h", 
       "src/core/channel/channel_args.h", 
       "src/core/channel/channel_stack.h", 
@@ -3527,6 +3564,7 @@
       "src/core/client_config/client_config.h", 
       "src/core/client_config/connector.h", 
       "src/core/client_config/initial_connect_string.h", 
+      "src/core/client_config/lb_policies/load_balancer_api.h", 
       "src/core/client_config/lb_policies/pick_first.h", 
       "src/core/client_config/lb_policies/round_robin.h", 
       "src/core/client_config/lb_policy.h", 
@@ -3587,6 +3625,7 @@
       "src/core/json/json_common.h", 
       "src/core/json/json_reader.h", 
       "src/core/json/json_writer.h", 
+      "src/core/proto/grpc/lb/v0/load_balancer.pb.h", 
       "src/core/statistics/census_interface.h", 
       "src/core/statistics/census_rpc_stats.h", 
       "src/core/surface/api_trace.h", 
@@ -3625,7 +3664,11 @@
       "src/core/transport/metadata_batch.h", 
       "src/core/transport/static_metadata.h", 
       "src/core/transport/transport.h", 
-      "src/core/transport/transport_impl.h"
+      "src/core/transport/transport_impl.h", 
+      "third_party/nanopb/pb.h", 
+      "third_party/nanopb/pb_common.h", 
+      "third_party/nanopb/pb_decode.h", 
+      "third_party/nanopb/pb_encode.h"
     ], 
     "language": "c", 
     "name": "grpc_unsecure", 
@@ -3648,8 +3691,8 @@
       "src/core/census/grpc_filter.c", 
       "src/core/census/grpc_filter.h", 
       "src/core/census/initialize.c", 
-      "src/core/census/log.c", 
-      "src/core/census/log.h", 
+      "src/core/census/mlog.c", 
+      "src/core/census/mlog.h", 
       "src/core/census/operation.c", 
       "src/core/census/placeholders.c", 
       "src/core/census/rpc_metric_id.h", 
@@ -3680,6 +3723,8 @@
       "src/core/client_config/default_initial_connect_string.c", 
       "src/core/client_config/initial_connect_string.c", 
       "src/core/client_config/initial_connect_string.h", 
+      "src/core/client_config/lb_policies/load_balancer_api.c", 
+      "src/core/client_config/lb_policies/load_balancer_api.h", 
       "src/core/client_config/lb_policies/pick_first.c", 
       "src/core/client_config/lb_policies/pick_first.h", 
       "src/core/client_config/lb_policies/round_robin.c", 
@@ -3804,6 +3849,8 @@
       "src/core/json/json_string.c", 
       "src/core/json/json_writer.c", 
       "src/core/json/json_writer.h", 
+      "src/core/proto/grpc/lb/v0/load_balancer.pb.c", 
+      "src/core/proto/grpc/lb/v0/load_balancer.pb.h", 
       "src/core/statistics/census_interface.h", 
       "src/core/statistics/census_rpc_stats.h", 
       "src/core/surface/alarm.c", 
@@ -4182,7 +4229,8 @@
       "test/cpp/util/cli_call.h", 
       "test/cpp/util/create_test_channel.h", 
       "test/cpp/util/string_ref_helper.h", 
-      "test/cpp/util/subprocess.h"
+      "test/cpp/util/subprocess.h", 
+      "test/cpp/util/test_credentials_provider.h"
     ], 
     "language": "c++", 
     "name": "grpc++_test_util", 
@@ -4198,7 +4246,9 @@
       "test/cpp/util/string_ref_helper.cc", 
       "test/cpp/util/string_ref_helper.h", 
       "test/cpp/util/subprocess.cc", 
-      "test/cpp/util/subprocess.h"
+      "test/cpp/util/subprocess.h", 
+      "test/cpp/util/test_credentials_provider.cc", 
+      "test/cpp/util/test_credentials_provider.h"
     ]
   }, 
   {
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index ea9c129101db84b9f5b5adcef61a455172025f1c..8868e2a93eab4bbbbe2020e50b043622c0e9dbc9 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -2039,6 +2039,26 @@
       "windows"
     ]
   }, 
+  {
+    "args": [], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c++", 
+    "name": "grpclb_api_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ]
+  }, 
   {
     "args": [], 
     "ci_platforms": [
@@ -2104,7 +2124,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 10, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c++", 
@@ -2123,9 +2143,7 @@
       "posix"
     ], 
     "cpu_cost": 10, 
-    "exclude_configs": [
-      "tsan"
-    ], 
+    "exclude_configs": [], 
     "flaky": false, 
     "language": "c++", 
     "name": "qps_test", 
diff --git a/vsprojects/buildtests_c.sln b/vsprojects/buildtests_c.sln
index b30941ff73894a16c13546ce2ca1476e544b22cc..3a337576d1e023fe2b1455caee67b83c9202e00c 100644
--- a/vsprojects/buildtests_c.sln
+++ b/vsprojects/buildtests_c.sln
@@ -24,6 +24,15 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "grpc", "vcxproj\.\grpc\grpc
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "grpc_dll", "vcxproj\.\grpc_dll\grpc_dll.vcxproj", "{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}"
+	ProjectSection(myProperties) = preProject
+        	lib = "True"
+	EndProjectSection
+	ProjectSection(ProjectDependencies) = postProject
+		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
+		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
+	EndProjectSection
+EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "grpc_test_util", "vcxproj\.\grpc_test_util\grpc_test_util.vcxproj", "{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}"
 	ProjectSection(myProperties) = preProject
         	lib = "True"
@@ -1375,6 +1384,22 @@ Global
 		{29D16885-7228-4C31-81ED-5F9187C7F2A9}.Release-DLL|Win32.Build.0 = Release-DLL|Win32
 		{29D16885-7228-4C31-81ED-5F9187C7F2A9}.Release-DLL|x64.ActiveCfg = Release-DLL|x64
 		{29D16885-7228-4C31-81ED-5F9187C7F2A9}.Release-DLL|x64.Build.0 = Release-DLL|x64
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Debug|Win32.ActiveCfg = Debug|Win32
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Debug|x64.ActiveCfg = Debug|x64
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Release|Win32.ActiveCfg = Release|Win32
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Release|x64.ActiveCfg = Release|x64
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Debug|Win32.Build.0 = Debug|Win32
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Debug|x64.Build.0 = Debug|x64
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Release|Win32.Build.0 = Release|Win32
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Release|x64.Build.0 = Release|x64
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Debug-DLL|Win32.Build.0 = Debug|Win32
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Debug-DLL|x64.ActiveCfg = Debug|x64
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Debug-DLL|x64.Build.0 = Debug|x64
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Release-DLL|Win32.ActiveCfg = Release|Win32
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Release-DLL|Win32.Build.0 = Release|Win32
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Release-DLL|x64.ActiveCfg = Release|x64
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Release-DLL|x64.Build.0 = Release|x64
 		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}.Debug|Win32.ActiveCfg = Debug|Win32
 		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}.Debug|x64.ActiveCfg = Debug|x64
 		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}.Release|Win32.ActiveCfg = Release|Win32
diff --git a/vsprojects/grpc.sln b/vsprojects/grpc.sln
index ad9198341ad67a25142ca510f5b4d2c65108190b..3f6b3379728a70059c39b89df8f817bc7fda3c2c 100644
--- a/vsprojects/grpc.sln
+++ b/vsprojects/grpc.sln
@@ -24,6 +24,15 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "grpc", "vcxproj\.\grpc\grpc
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "grpc_dll", "vcxproj\.\grpc_dll\grpc_dll.vcxproj", "{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}"
+	ProjectSection(myProperties) = preProject
+        	lib = "True"
+	EndProjectSection
+	ProjectSection(ProjectDependencies) = postProject
+		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
+		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
+	EndProjectSection
+EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "grpc_test_util", "vcxproj\.\grpc_test_util\grpc_test_util.vcxproj", "{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}"
 	ProjectSection(myProperties) = preProject
         	lib = "True"
@@ -220,6 +229,22 @@ Global
 		{29D16885-7228-4C31-81ED-5F9187C7F2A9}.Release-DLL|Win32.Build.0 = Release-DLL|Win32
 		{29D16885-7228-4C31-81ED-5F9187C7F2A9}.Release-DLL|x64.ActiveCfg = Release-DLL|x64
 		{29D16885-7228-4C31-81ED-5F9187C7F2A9}.Release-DLL|x64.Build.0 = Release-DLL|x64
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Debug|Win32.ActiveCfg = Debug|Win32
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Debug|x64.ActiveCfg = Debug|x64
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Release|Win32.ActiveCfg = Release|Win32
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Release|x64.ActiveCfg = Release|x64
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Debug|Win32.Build.0 = Debug|Win32
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Debug|x64.Build.0 = Debug|x64
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Release|Win32.Build.0 = Release|Win32
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Release|x64.Build.0 = Release|x64
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Debug-DLL|Win32.Build.0 = Debug|Win32
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Debug-DLL|x64.ActiveCfg = Debug|x64
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Debug-DLL|x64.Build.0 = Debug|x64
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Release-DLL|Win32.ActiveCfg = Release|Win32
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Release-DLL|Win32.Build.0 = Release|Win32
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Release-DLL|x64.ActiveCfg = Release|x64
+		{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}.Release-DLL|x64.Build.0 = Release|x64
 		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}.Debug|Win32.ActiveCfg = Debug|Win32
 		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}.Debug|x64.ActiveCfg = Debug|x64
 		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}.Release|Win32.ActiveCfg = Release|Win32
diff --git a/vsprojects/protoc.props b/vsprojects/protoc.props
index ecaf248446e1677515a2704300a4d9891bcf8a4e..1bdc07193bce01b5aad1e89616c79b55da335ddc 100644
--- a/vsprojects/protoc.props
+++ b/vsprojects/protoc.props
@@ -1 +1 @@
-<?xml version="1.0" encoding="utf-8"?> <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <ImportGroup Label="PropertySheets" /> <PropertyGroup Label="UserMacros" /> <PropertyGroup /> <ItemDefinitionGroup> <Link> <AdditionalDependencies>libprotoc.lib;%(AdditionalDependencies)</AdditionalDependencies> <AdditionalLibraryDirectories>$(SolutionDir)\..\third_party\protobuf\cmake\$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories> </Link> </ItemDefinitionGroup> <ItemGroup /> </Project>
\ No newline at end of file
+<?xml version="1.0" encoding="utf-8"?> <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <ImportGroup Label="PropertySheets" /> <PropertyGroup Label="UserMacros" /> <PropertyGroup /> <ItemDefinitionGroup> <ClCompile> <DisableSpecificWarnings>4244;4267;%(DisableSpecificWarnings)</DisableSpecificWarnings> </ClCompile> <Link> <AdditionalDependencies>libprotoc.lib;%(AdditionalDependencies)</AdditionalDependencies> <AdditionalLibraryDirectories>$(SolutionDir)\..\third_party\protobuf\cmake\$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories> </Link> </ItemDefinitionGroup> <ItemGroup /> </Project>
\ No newline at end of file
diff --git a/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj b/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj
index 3d353716a9e5b1b3d49effee7a07ca42368384de..33860af620b65f742a630a59991d927321e2cc8f 100644
--- a/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj
+++ b/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj
@@ -153,6 +153,7 @@
     <ClInclude Include="$(SolutionDir)\..\test\cpp\util\create_test_channel.h" />
     <ClInclude Include="$(SolutionDir)\..\test\cpp\util\string_ref_helper.h" />
     <ClInclude Include="$(SolutionDir)\..\test\cpp\util\subprocess.h" />
+    <ClInclude Include="$(SolutionDir)\..\test\cpp\util\test_credentials_provider.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="$(SolutionDir)\..\src\proto\grpc\testing\echo_messages.pb.cc">
@@ -191,6 +192,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\cpp\util\subprocess.cc">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\cpp\util\test_credentials_provider.cc">
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc++\grpc++.vcxproj">
diff --git a/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters b/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters
index 27ac6751b94c9cc6d22e5fdf3cf6bee87ff9998d..b35ba1fd91c8dd8d4988d9e738d1f829630b680f 100644
--- a/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters
@@ -28,6 +28,9 @@
     <ClCompile Include="$(SolutionDir)\..\test\cpp\util\subprocess.cc">
       <Filter>test\cpp\util</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\cpp\util\test_credentials_provider.cc">
+      <Filter>test\cpp\util</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\test\cpp\end2end\test_service_impl.h">
@@ -48,6 +51,9 @@
     <ClInclude Include="$(SolutionDir)\..\test\cpp\util\subprocess.h">
       <Filter>test\cpp\util</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\test\cpp\util\test_credentials_provider.h">
+      <Filter>test\cpp\util</Filter>
+    </ClInclude>
   </ItemGroup>
 
   <ItemGroup>
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index f866a15f8bd8dab863e53b4ffd0ce096dca06a87..4b39ff284f84037a1b9dccd462a7ce20d6e53470 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -282,20 +282,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\census.h" />
   </ItemGroup>
   <ItemGroup>
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\auth_filters.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\base64.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\credentials.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\handshake.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\json_token.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\jwt_verifier.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\secure_endpoint.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\security_connector.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\security_context.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\fake_transport_security.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\ssl_transport_security.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\ssl_types.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\transport_security.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\transport_security_interface.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\census\grpc_filter.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\channel_args.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\channel_stack.h" />
@@ -310,6 +296,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\client_config\client_config.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\client_config\connector.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\client_config\initial_connect_string.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\client_config\lb_policies\load_balancer_api.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\client_config\lb_policies\pick_first.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\client_config\lb_policies\round_robin.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\client_config\lb_policy.h" />
@@ -370,6 +357,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\json\json_common.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\json\json_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\json\json_writer.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\proto\grpc\lb\v0\load_balancer.pb.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\statistics\census_interface.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\statistics\census_rpc_stats.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\api_trace.h" />
@@ -409,53 +397,29 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\transport\static_metadata.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\transport\transport.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\transport\transport_impl.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\auth_filters.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\base64.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\credentials.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\handshake.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\json_token.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\jwt_verifier.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\secure_endpoint.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\security_connector.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\security_context.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\fake_transport_security.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\ssl_transport_security.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\ssl_types.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\transport_security.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\transport_security_interface.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\census\aggregation.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\census\log.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\census\mlog.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\census\rpc_metric_id.h" />
+    <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb.h" />
+    <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_common.h" />
+    <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_decode.h" />
+    <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_encode.h" />
   </ItemGroup>
   <ItemGroup>
-    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\httpcli_security_connector.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\base64.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\client_auth_filter.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\credentials.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\credentials_metadata.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\credentials_posix.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\credentials_win32.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\google_default_credentials.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\handshake.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\json_token.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\jwt_verifier.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\secure_endpoint.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\security_connector.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\security_context.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\server_auth_filter.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\server_secure_chttp2.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\surface\init_secure.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\surface\secure_channel_create.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\tsi\fake_transport_security.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\tsi\ssl_transport_security.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\tsi\transport_security.c">
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\grpc_context.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\grpc_filter.c">
@@ -486,6 +450,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\client_config\initial_connect_string.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\client_config\lb_policies\load_balancer_api.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\client_config\lb_policies\pick_first.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\client_config\lb_policies\round_robin.c">
@@ -614,6 +580,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\json\json_writer.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\proto\grpc\lb\v0\load_balancer.pb.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\alarm.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\api_trace.c">
@@ -712,11 +680,53 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\transport\transport_op_string.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\httpcli_security_connector.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\base64.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\client_auth_filter.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\credentials.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\credentials_metadata.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\credentials_posix.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\credentials_win32.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\google_default_credentials.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\handshake.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\json_token.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\jwt_verifier.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\secure_endpoint.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\security_connector.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\security_context.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\server_auth_filter.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\server_secure_chttp2.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\init_secure.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\secure_channel_create.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\tsi\fake_transport_security.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\tsi\ssl_transport_security.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\tsi\transport_security.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\context.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\initialize.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\census\log.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\census\mlog.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\operation.c">
     </ClCompile>
@@ -724,6 +734,12 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\tracing.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_common.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_decode.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_encode.c">
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\gpr\gpr.vcxproj">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 344cdcf9a9b6dd0e2943caad18f4004ce76605ec..1989a4705999838e8129c63646c0f4cf8ee23dd6 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -1,69 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
-    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\httpcli_security_connector.c">
-      <Filter>src\core\httpcli</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\base64.c">
-      <Filter>src\core\security</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\client_auth_filter.c">
-      <Filter>src\core\security</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\credentials.c">
-      <Filter>src\core\security</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\credentials_metadata.c">
-      <Filter>src\core\security</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\credentials_posix.c">
-      <Filter>src\core\security</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\credentials_win32.c">
-      <Filter>src\core\security</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\google_default_credentials.c">
-      <Filter>src\core\security</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\handshake.c">
-      <Filter>src\core\security</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\json_token.c">
-      <Filter>src\core\security</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\jwt_verifier.c">
-      <Filter>src\core\security</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\secure_endpoint.c">
-      <Filter>src\core\security</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\security_connector.c">
-      <Filter>src\core\security</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\security_context.c">
-      <Filter>src\core\security</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\server_auth_filter.c">
-      <Filter>src\core\security</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\security\server_secure_chttp2.c">
-      <Filter>src\core\security</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\surface\init_secure.c">
-      <Filter>src\core\surface</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\surface\secure_channel_create.c">
-      <Filter>src\core\surface</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\tsi\fake_transport_security.c">
-      <Filter>src\core\tsi</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\tsi\ssl_transport_security.c">
-      <Filter>src\core\tsi</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\tsi\transport_security.c">
-      <Filter>src\core\tsi</Filter>
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\grpc_context.c">
       <Filter>src\core\census</Filter>
     </ClCompile>
@@ -109,6 +46,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\client_config\initial_connect_string.c">
       <Filter>src\core\client_config</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\client_config\lb_policies\load_balancer_api.c">
+      <Filter>src\core\client_config\lb_policies</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\client_config\lb_policies\pick_first.c">
       <Filter>src\core\client_config\lb_policies</Filter>
     </ClCompile>
@@ -301,6 +241,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\json\json_writer.c">
       <Filter>src\core\json</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\proto\grpc\lb\v0\load_balancer.pb.c">
+      <Filter>src\core\proto\grpc\lb\v0</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\alarm.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>
@@ -448,13 +391,76 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\transport\transport_op_string.c">
       <Filter>src\core\transport</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\httpcli_security_connector.c">
+      <Filter>src\core\httpcli</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\base64.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\client_auth_filter.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\credentials.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\credentials_metadata.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\credentials_posix.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\credentials_win32.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\google_default_credentials.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\handshake.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\json_token.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\jwt_verifier.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\secure_endpoint.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\security_connector.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\security_context.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\server_auth_filter.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\security\server_secure_chttp2.c">
+      <Filter>src\core\security</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\init_secure.c">
+      <Filter>src\core\surface</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\secure_channel_create.c">
+      <Filter>src\core\surface</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\tsi\fake_transport_security.c">
+      <Filter>src\core\tsi</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\tsi\ssl_transport_security.c">
+      <Filter>src\core\tsi</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\tsi\transport_security.c">
+      <Filter>src\core\tsi</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\context.c">
       <Filter>src\core\census</Filter>
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\initialize.c">
       <Filter>src\core\census</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\census\log.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\census\mlog.c">
       <Filter>src\core\census</Filter>
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\operation.c">
@@ -466,6 +472,15 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\census\tracing.c">
       <Filter>src\core\census</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_common.c">
+      <Filter>third_party\nanopb</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_decode.c">
+      <Filter>third_party\nanopb</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_encode.c">
+      <Filter>third_party\nanopb</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_security.h">
@@ -509,48 +524,6 @@
     </ClInclude>
   </ItemGroup>
   <ItemGroup>
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\auth_filters.h">
-      <Filter>src\core\security</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\base64.h">
-      <Filter>src\core\security</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\credentials.h">
-      <Filter>src\core\security</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\handshake.h">
-      <Filter>src\core\security</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\json_token.h">
-      <Filter>src\core\security</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\jwt_verifier.h">
-      <Filter>src\core\security</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\secure_endpoint.h">
-      <Filter>src\core\security</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\security_connector.h">
-      <Filter>src\core\security</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\security\security_context.h">
-      <Filter>src\core\security</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\fake_transport_security.h">
-      <Filter>src\core\tsi</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\ssl_transport_security.h">
-      <Filter>src\core\tsi</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\ssl_types.h">
-      <Filter>src\core\tsi</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\transport_security.h">
-      <Filter>src\core\tsi</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\transport_security_interface.h">
-      <Filter>src\core\tsi</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\census\grpc_filter.h">
       <Filter>src\core\census</Filter>
     </ClInclude>
@@ -593,6 +566,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\client_config\initial_connect_string.h">
       <Filter>src\core\client_config</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\client_config\lb_policies\load_balancer_api.h">
+      <Filter>src\core\client_config\lb_policies</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\client_config\lb_policies\pick_first.h">
       <Filter>src\core\client_config\lb_policies</Filter>
     </ClInclude>
@@ -773,6 +749,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\json\json_writer.h">
       <Filter>src\core\json</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\proto\grpc\lb\v0\load_balancer.pb.h">
+      <Filter>src\core\proto\grpc\lb\v0</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\statistics\census_interface.h">
       <Filter>src\core\statistics</Filter>
     </ClInclude>
@@ -890,15 +869,69 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\transport\transport_impl.h">
       <Filter>src\core\transport</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\auth_filters.h">
+      <Filter>src\core\security</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\base64.h">
+      <Filter>src\core\security</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\credentials.h">
+      <Filter>src\core\security</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\handshake.h">
+      <Filter>src\core\security</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\json_token.h">
+      <Filter>src\core\security</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\jwt_verifier.h">
+      <Filter>src\core\security</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\secure_endpoint.h">
+      <Filter>src\core\security</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\security_connector.h">
+      <Filter>src\core\security</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\security\security_context.h">
+      <Filter>src\core\security</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\fake_transport_security.h">
+      <Filter>src\core\tsi</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\ssl_transport_security.h">
+      <Filter>src\core\tsi</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\ssl_types.h">
+      <Filter>src\core\tsi</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\transport_security.h">
+      <Filter>src\core\tsi</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\tsi\transport_security_interface.h">
+      <Filter>src\core\tsi</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\census\aggregation.h">
       <Filter>src\core\census</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\census\log.h">
+    <ClInclude Include="$(SolutionDir)\..\src\core\census\mlog.h">
       <Filter>src\core\census</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\census\rpc_metric_id.h">
       <Filter>src\core\census</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb.h">
+      <Filter>third_party\nanopb</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_common.h">
+      <Filter>third_party\nanopb</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_decode.h">
+      <Filter>third_party\nanopb</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_encode.h">
+      <Filter>third_party\nanopb</Filter>
+    </ClInclude>
   </ItemGroup>
 
   <ItemGroup>
@@ -950,6 +983,18 @@
     <Filter Include="src\core\json">
       <UniqueIdentifier>{e665cc0e-b994-d7c5-cc18-2007392019f0}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\core\proto">
+      <UniqueIdentifier>{1ff04466-0905-8a5d-d6f4-7ff2df4c13b5}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\proto\grpc">
+      <UniqueIdentifier>{7c7ad0b3-bf85-5bd3-e0c8-4f5468a8e2e6}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\proto\grpc\lb">
+      <UniqueIdentifier>{3d533dad-8100-e8a3-b7c3-1fc13a4d60da}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\proto\grpc\lb\v0">
+      <UniqueIdentifier>{0ffcf868-7617-5fed-b6ce-2162d9d09148}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src\core\security">
       <UniqueIdentifier>{1d850ac6-e639-4eab-5338-4ba40272fcc9}</UniqueIdentifier>
     </Filter>
@@ -968,6 +1013,12 @@
     <Filter Include="src\core\tsi">
       <UniqueIdentifier>{0b0f9ab1-efa4-7f03-e446-6fb9b5227e84}</UniqueIdentifier>
     </Filter>
+    <Filter Include="third_party">
+      <UniqueIdentifier>{aaab30a4-2a15-732e-c141-3fbc0f0f5a7a}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="third_party\nanopb">
+      <UniqueIdentifier>{93d6596d-330c-1d27-6f84-3c840e57869e}</UniqueIdentifier>
+    </Filter>
   </ItemGroup>
 </Project>
 
diff --git a/vsprojects/vcxproj/grpc_dll/grpc_dll.vcxproj b/vsprojects/vcxproj/grpc_dll/grpc_dll.vcxproj
new file mode 100644
index 0000000000000000000000000000000000000000..cafc9518674a2943b2b8a0000534c497cbea7998
--- /dev/null
+++ b/vsprojects/vcxproj/grpc_dll/grpc_dll.vcxproj
@@ -0,0 +1,200 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\1.0.204.1.props')" />
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{A2F6CBBA-A553-41B3-A7DE-F26DECCC27F0}</ProjectGuid>
+    <IgnoreWarnIntDirInTempDetected>true</IgnoreWarnIntDirInTempDetected>
+    <IntDir>$(SolutionDir)IntDir\$(MSBuildProjectName)\</IntDir>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '10.0'" Label="Configuration">
+    <PlatformToolset>v100</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '11.0'" Label="Configuration">
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '12.0'" Label="Configuration">
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '14.0'" Label="Configuration">
+    <PlatformToolset>v140</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="$(SolutionDir)\..\vsprojects\global.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\openssl.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\winsock.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\zlib.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'">
+    <TargetName>grpc_dll</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
+    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
+    <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'">
+    <TargetName>grpc_dll</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Release</Configuration-grpc_dependencies_zlib>
+    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
+    <Configuration-grpc_dependencies_openssl>Release</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <ModuleDefinitionFile>$(SolutionDir)\..\grpc.def</ModuleDefinitionFile>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <ModuleDefinitionFile>$(SolutionDir)\..\grpc.def</ModuleDefinitionFile>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <ModuleDefinitionFile>$(SolutionDir)\..\grpc.def</ModuleDefinitionFile>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <ModuleDefinitionFile>$(SolutionDir)\..\grpc.def</ModuleDefinitionFile>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+  <ItemGroup>
+    <None Include="$(SolutionDir)\..\grpc.def" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\vsprojects\dummy.c">
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\gpr\gpr.vcxproj">
+      <Project>{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}</Project>
+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc\grpc.vcxproj">
+      <Project>{29D16885-7228-4C31-81ED-5F9187C7F2A9}</Project>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies\grpc.dependencies.openssl.targets')" />
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies\grpc.dependencies.openssl.targets')" />
+  </ImportGroup>
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets')" />
+  </Target>
+</Project>
+
diff --git a/vsprojects/vcxproj/grpc_dll/grpc_dll.vcxproj.filters b/vsprojects/vcxproj/grpc_dll/grpc_dll.vcxproj.filters
new file mode 100644
index 0000000000000000000000000000000000000000..8493ace0a2486300a22de07b0afc204f2e84f4a0
--- /dev/null
+++ b/vsprojects/vcxproj/grpc_dll/grpc_dll.vcxproj.filters
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <None Include="$(SolutionDir)\..\grpc.def" />
+  </ItemGroup>
+
+  <ItemGroup>
+  </ItemGroup>
+</Project>
+
diff --git a/vsprojects/vcxproj/grpc_plugin_support/grpc_plugin_support.vcxproj b/vsprojects/vcxproj/grpc_plugin_support/grpc_plugin_support.vcxproj
index 89183902d74c09c0ae53e67555b91efcf6fdf5ee..a76c883903a6910c16761154904abd9b60c74874 100644
--- a/vsprojects/vcxproj/grpc_plugin_support/grpc_plugin_support.vcxproj
+++ b/vsprojects/vcxproj/grpc_plugin_support/grpc_plugin_support.vcxproj
@@ -53,6 +53,7 @@
   <ImportGroup Label="PropertySheets">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
     <Import Project="$(SolutionDir)\..\vsprojects\global.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\protoc.props" />
     <Import Project="$(SolutionDir)\..\vsprojects\winsock.props" />
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index 78c3bcd0e92de06d32a9a627b50267c5ecc61941..d61c5a75745a3e3427551b0c91477f32270daa6f 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -286,6 +286,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\client_config\client_config.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\client_config\connector.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\client_config\initial_connect_string.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\client_config\lb_policies\load_balancer_api.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\client_config\lb_policies\pick_first.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\client_config\lb_policies\round_robin.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\client_config\lb_policy.h" />
@@ -346,6 +347,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\json\json_common.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\json\json_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\json\json_writer.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\proto\grpc\lb\v0\load_balancer.pb.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\statistics\census_interface.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\statistics\census_rpc_stats.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\api_trace.h" />
@@ -386,8 +388,12 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\transport\transport.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\transport\transport_impl.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\census\aggregation.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\census\log.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\census\mlog.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\census\rpc_metric_id.h" />
+    <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb.h" />
+    <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_common.h" />
+    <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_decode.h" />
+    <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_encode.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\init_unsecure.c">
@@ -422,6 +428,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\client_config\initial_connect_string.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\client_config\lb_policies\load_balancer_api.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\client_config\lb_policies\pick_first.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\client_config\lb_policies\round_robin.c">
@@ -550,6 +558,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\json\json_writer.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\proto\grpc\lb\v0\load_balancer.pb.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\alarm.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\api_trace.c">
@@ -652,7 +662,7 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\initialize.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\census\log.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\census\mlog.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\operation.c">
     </ClCompile>
@@ -660,6 +670,12 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\tracing.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_common.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_decode.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_encode.c">
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\gpr\gpr.vcxproj">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index 063bb47dfa108221a2be83287c98dce3a9f2f15e..ee51cafd256d1a7db5bf3ea9e1a2dc1dfdc4b875 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -49,6 +49,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\client_config\initial_connect_string.c">
       <Filter>src\core\client_config</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\client_config\lb_policies\load_balancer_api.c">
+      <Filter>src\core\client_config\lb_policies</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\client_config\lb_policies\pick_first.c">
       <Filter>src\core\client_config\lb_policies</Filter>
     </ClCompile>
@@ -241,6 +244,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\json\json_writer.c">
       <Filter>src\core\json</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\proto\grpc\lb\v0\load_balancer.pb.c">
+      <Filter>src\core\proto\grpc\lb\v0</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\alarm.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>
@@ -394,7 +400,7 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\census\initialize.c">
       <Filter>src\core\census</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\census\log.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\census\mlog.c">
       <Filter>src\core\census</Filter>
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\operation.c">
@@ -406,6 +412,15 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\census\tracing.c">
       <Filter>src\core\census</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_common.c">
+      <Filter>third_party\nanopb</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_decode.c">
+      <Filter>third_party\nanopb</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_encode.c">
+      <Filter>third_party\nanopb</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\byte_buffer.h">
@@ -488,6 +503,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\client_config\initial_connect_string.h">
       <Filter>src\core\client_config</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\client_config\lb_policies\load_balancer_api.h">
+      <Filter>src\core\client_config\lb_policies</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\client_config\lb_policies\pick_first.h">
       <Filter>src\core\client_config\lb_policies</Filter>
     </ClInclude>
@@ -668,6 +686,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\json\json_writer.h">
       <Filter>src\core\json</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\proto\grpc\lb\v0\load_balancer.pb.h">
+      <Filter>src\core\proto\grpc\lb\v0</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\statistics\census_interface.h">
       <Filter>src\core\statistics</Filter>
     </ClInclude>
@@ -788,12 +809,24 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\census\aggregation.h">
       <Filter>src\core\census</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\census\log.h">
+    <ClInclude Include="$(SolutionDir)\..\src\core\census\mlog.h">
       <Filter>src\core\census</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\census\rpc_metric_id.h">
       <Filter>src\core\census</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb.h">
+      <Filter>third_party\nanopb</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_common.h">
+      <Filter>third_party\nanopb</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_decode.h">
+      <Filter>third_party\nanopb</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_encode.h">
+      <Filter>third_party\nanopb</Filter>
+    </ClInclude>
   </ItemGroup>
 
   <ItemGroup>
@@ -845,6 +878,18 @@
     <Filter Include="src\core\json">
       <UniqueIdentifier>{443ffc61-1bea-2477-6e54-1ddf8c139264}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\core\proto">
+      <UniqueIdentifier>{7f4bb22a-65ba-0f8f-6387-66b1f6677a80}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\proto\grpc">
+      <UniqueIdentifier>{9c2bd164-c317-8a13-564d-3b28b0fd79cf}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\proto\grpc\lb">
+      <UniqueIdentifier>{2bad8e10-4fc5-d8b3-e026-4abbd0c25cda}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\proto\grpc\lb\v0">
+      <UniqueIdentifier>{4475c8ed-e01b-8906-47d0-8a504189c0d5}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src\core\statistics">
       <UniqueIdentifier>{e084164c-a069-00e3-db35-4e0b1cd6f0b7}</UniqueIdentifier>
     </Filter>
@@ -857,6 +902,12 @@
     <Filter Include="src\core\transport\chttp2">
       <UniqueIdentifier>{5fcd6206-f774-9ae6-4b85-305d6a723843}</UniqueIdentifier>
     </Filter>
+    <Filter Include="third_party">
+      <UniqueIdentifier>{025c051e-8eba-125b-67f9-173f95176eb2}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="third_party\nanopb">
+      <UniqueIdentifier>{6511f77d-f28c-80e0-0889-8975e688e344}</UniqueIdentifier>
+    </Filter>
   </ItemGroup>
 </Project>
 
diff --git a/vsprojects/vcxproj/test/census_log_test/census_log_test.vcxproj b/vsprojects/vcxproj/test/census_log_test/census_log_test.vcxproj
index 851086d663539777b2a10fedf4893db75d8200b3..9f2480085b54c6069b26e57f2c37bb2317593ca8 100644
--- a/vsprojects/vcxproj/test/census_log_test/census_log_test.vcxproj
+++ b/vsprojects/vcxproj/test/census_log_test/census_log_test.vcxproj
@@ -158,7 +158,7 @@
   </ItemDefinitionGroup>
 
   <ItemGroup>
-    <ClCompile Include="$(SolutionDir)\..\test\core\census\log_test.c">
+    <ClCompile Include="$(SolutionDir)\..\test\core\census\mlog_test.c">
     </ClCompile>
   </ItemGroup>
   <ItemGroup>
diff --git a/vsprojects/vcxproj/test/census_log_test/census_log_test.vcxproj.filters b/vsprojects/vcxproj/test/census_log_test/census_log_test.vcxproj.filters
index 135c77847f926e6a334f3da7c8b76eb9a7863eea..8b70dcb2a41bec7e9e798620a9c10c40d3840d16 100644
--- a/vsprojects/vcxproj/test/census_log_test/census_log_test.vcxproj.filters
+++ b/vsprojects/vcxproj/test/census_log_test/census_log_test.vcxproj.filters
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
-    <ClCompile Include="$(SolutionDir)\..\test\core\census\log_test.c">
+    <ClCompile Include="$(SolutionDir)\..\test\core\census\mlog_test.c">
       <Filter>test\core\census</Filter>
     </ClCompile>
   </ItemGroup>
diff --git a/vsprojects/vcxproj/test/grpclb_api_test/grpclb_api_test.vcxproj b/vsprojects/vcxproj/test/grpclb_api_test/grpclb_api_test.vcxproj
new file mode 100644
index 0000000000000000000000000000000000000000..1509ece9f96a82b1ac74129593f6c07794df1bb6
--- /dev/null
+++ b/vsprojects/vcxproj/test/grpclb_api_test/grpclb_api_test.vcxproj
@@ -0,0 +1,209 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\1.0.204.1.props')" />
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{990AF023-17D7-8DBF-EB6E-14C7C016C77E}</ProjectGuid>
+    <IgnoreWarnIntDirInTempDetected>true</IgnoreWarnIntDirInTempDetected>
+    <IntDir>$(SolutionDir)IntDir\$(MSBuildProjectName)\</IntDir>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '10.0'" Label="Configuration">
+    <PlatformToolset>v100</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '11.0'" Label="Configuration">
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '12.0'" Label="Configuration">
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '14.0'" Label="Configuration">
+    <PlatformToolset>v140</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="$(SolutionDir)\..\vsprojects\cpptest.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\global.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\openssl.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\protobuf.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\winsock.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\zlib.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'">
+    <TargetName>grpclb_api_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
+    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
+    <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'">
+    <TargetName>grpclb_api_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Release</Configuration-grpc_dependencies_zlib>
+    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
+    <Configuration-grpc_dependencies_openssl>Release</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+  <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\src\proto\grpc\lb\v0\load_balancer.pb.cc">
+    </ClCompile>
+    <ClInclude Include="$(SolutionDir)\..\src\proto\grpc\lb\v0\load_balancer.pb.h">
+    </ClInclude>
+    <ClCompile Include="$(SolutionDir)\..\src\proto\grpc\lb\v0\load_balancer.grpc.pb.cc">
+    </ClCompile>
+    <ClInclude Include="$(SolutionDir)\..\src\proto\grpc\lb\v0\load_balancer.grpc.pb.h">
+    </ClInclude>
+    <ClCompile Include="$(SolutionDir)\..\test\cpp\grpclb\grpclb_api_test.cc">
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc++_test_util\grpc++_test_util.vcxproj">
+      <Project>{0BE77741-552A-929B-A497-4EF7ECE17A64}</Project>
+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc_test_util\grpc_test_util.vcxproj">
+      <Project>{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}</Project>
+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc++\grpc++.vcxproj">
+      <Project>{C187A093-A0FE-489D-A40A-6E33DE0F9FEB}</Project>
+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc\grpc.vcxproj">
+      <Project>{29D16885-7228-4C31-81ED-5F9187C7F2A9}</Project>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies\grpc.dependencies.openssl.targets')" />
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies\grpc.dependencies.openssl.targets')" />
+  </ImportGroup>
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets')" />
+  </Target>
+</Project>
+
diff --git a/vsprojects/vcxproj/test/grpclb_api_test/grpclb_api_test.vcxproj.filters b/vsprojects/vcxproj/test/grpclb_api_test/grpclb_api_test.vcxproj.filters
new file mode 100644
index 0000000000000000000000000000000000000000..6c57b8c162a7e34d7ead3fbf32e691069a1f8b5e
--- /dev/null
+++ b/vsprojects/vcxproj/test/grpclb_api_test/grpclb_api_test.vcxproj.filters
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\src\proto\grpc\lb\v0\load_balancer.proto">
+      <Filter>src\proto\grpc\lb\v0</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\cpp\grpclb\grpclb_api_test.cc">
+      <Filter>test\cpp\grpclb</Filter>
+    </ClCompile>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Filter Include="src">
+      <UniqueIdentifier>{a31d21fb-c6ab-75ce-43dc-7d6f506765e6}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\proto">
+      <UniqueIdentifier>{10d49c90-8503-9b10-6678-eed983bc25d9}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\proto\grpc">
+      <UniqueIdentifier>{8b6be783-e071-44cc-2096-f1c476012556}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\proto\grpc\lb">
+      <UniqueIdentifier>{2981699e-c196-c599-bc17-c177770f89ee}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\proto\grpc\lb\v0">
+      <UniqueIdentifier>{3d04774a-1c2f-e100-435e-08af5d539250}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="test">
+      <UniqueIdentifier>{64736e1d-eb77-664f-34ab-6cf41263d3d8}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="test\cpp">
+      <UniqueIdentifier>{c86e9cb1-bed4-3697-40f2-9ecff6297fa5}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="test\cpp\grpclb">
+      <UniqueIdentifier>{6b5ba83a-6cf2-5a7b-0ab8-62de31882705}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+</Project>
+