Merge remote-tracking branch 'upstream/master' into revert-8949-revert-8922-slice_cleanup

.gitmodules

Makefile

build.yaml

include/grpc++/impl/codegen/completion_queue.h

include/grpc++/impl/codegen/server_interface.h

src/benchmark/gen_build_yaml.py

src/core/ext/transport/chttp2/client/chttp2_connector.c

src/core/ext/transport/chttp2/transport/chttp2_transport.c

src/core/ext/transport/chttp2/transport/internal.h

src/core/ext/transport/chttp2/transport/stream_lists.c

src/core/ext/transport/chttp2/transport/writing.c

src/core/ext/transport/cronet/transport/cronet_transport.c

src/core/lib/iomgr/tcp_posix.c

src/core/lib/surface/call.c

src/core/lib/surface/completion_queue.c

src/cpp/common/completion_queue_cc.cc

src/cpp/server/server_cc.cc

src/node/performance/worker_service_impl.js

src/objective-c/GRPCClient/private/GRPCWrappedCall.m

...e-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.m