Change name of thread_pool files to fixed_size_thread_pool when
appropriate
diff --git a/tools/doxygen/Doxyfile.c++ b/tools/doxygen/Doxyfile.c++
index e82e3bc..ca51980 100644
--- a/tools/doxygen/Doxyfile.c++
+++ b/tools/doxygen/Doxyfile.c++
@@ -772,6 +772,7 @@
include/grpc++/config_protobuf.h \
include/grpc++/create_channel.h \
include/grpc++/credentials.h \
+include/grpc++/fixed_size_thread_pool.h \
include/grpc++/generic_stub.h \
include/grpc++/impl/call.h \
include/grpc++/impl/client_unary_call.h \
@@ -796,7 +797,6 @@
include/grpc++/status.h \
include/grpc++/status_code_enum.h \
include/grpc++/stream.h \
-include/grpc++/thread_pool.h \
include/grpc++/thread_pool_interface.h \
include/grpc++/time.h