pre sync_stream.cc creation. Does not compile

BUILD

Makefile

build.yaml

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

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

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

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

include/grpc++/impl/proto_utils.h

include/grpc++/support/async_stream.h

include/grpc++/support/async_unary_call.h

include/grpc++/support/config_protobuf.h

include/grpc++/support/stub_options.h

include/grpc++/support/sync_stream.h

src/compiler/cpp_generator.cc

test/cpp/qps/client_async.cc

test/cpp/qps/client_sync.cc

test/cpp/qps/driver.cc

tools/doxygen/Doxyfile.c++

tools/doxygen/Doxyfile.c++.internal

tools/run_tests/sources_and_headers.json