Initial attempt at a C++ API for defining channel filters.
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index dcf1a4c..a3c4a10 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -762,6 +762,7 @@
INPUT = include/grpc++/alarm.h \
include/grpc++/channel.h \
+include/grpc++/channel_filter.h \
include/grpc++/client_context.h \
include/grpc++/completion_queue.h \
include/grpc++/create_channel.h \
@@ -880,6 +881,7 @@
src/cpp/client/generic_stub.cc \
src/cpp/client/insecure_credentials.cc \
src/cpp/common/channel_arguments.cc \
+src/cpp/common/channel_filter.cc \
src/cpp/common/completion_queue.cc \
src/cpp/common/core_codegen.cc \
src/cpp/common/rpc_method.cc \