Revise based on Mark's comments.

BUILD

CMakeLists.txt

binding.gyp

build.yaml

config.m4

gRPC-Core.podspec

grpc.gemspec

package.xml

src/core/tsi/transport_security.c

src/core/tsi/transport_security.h

src/core/tsi/transport_security_adapter.

src/core/tsi/transport_security_adapter.c

src/core/tsi/transport_security_interface.h

src/python/grpcio/grpc_core_dependencies.py

tools/doxygen/Doxyfile.core.internal

tools/run_tests/generated/sources_and_headers.json

vsprojects/vcxproj/grpc/grpc.vcxproj

vsprojects/vcxproj/grpc/grpc.vcxproj.filters