Optionalize deadline checking
diff --git a/grpc.gemspec b/grpc.gemspec
index 2ba0ec9..0e4a3d6 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -171,12 +171,12 @@
   s.files += %w( include/grpc/impl/codegen/sync_windows.h )
   s.files += %w( include/grpc/grpc_security.h )
   s.files += %w( include/grpc/census.h )
+  s.files += %w( src/core/ext/filters/deadline/deadline_filter.h )
   s.files += %w( src/core/lib/channel/channel_args.h )
   s.files += %w( src/core/lib/channel/channel_stack.h )
   s.files += %w( src/core/lib/channel/channel_stack_builder.h )
   s.files += %w( src/core/lib/channel/connected_channel.h )
   s.files += %w( src/core/lib/channel/context.h )
-  s.files += %w( src/core/lib/channel/deadline_filter.h )
   s.files += %w( src/core/lib/channel/handshaker.h )
   s.files += %w( src/core/lib/channel/handshaker_factory.h )
   s.files += %w( src/core/lib/channel/handshaker_registry.h )
@@ -374,11 +374,11 @@
   s.files += %w( src/core/ext/filters/max_age/max_age_filter.h )
   s.files += %w( src/core/ext/filters/message_size/message_size_filter.h )
   s.files += %w( src/core/lib/surface/init.c )
+  s.files += %w( src/core/ext/filters/deadline/deadline_filter.c )
   s.files += %w( src/core/lib/channel/channel_args.c )
   s.files += %w( src/core/lib/channel/channel_stack.c )
   s.files += %w( src/core/lib/channel/channel_stack_builder.c )
   s.files += %w( src/core/lib/channel/connected_channel.c )
-  s.files += %w( src/core/lib/channel/deadline_filter.c )
   s.files += %w( src/core/lib/channel/handshaker.c )
   s.files += %w( src/core/lib/channel/handshaker_factory.c )
   s.files += %w( src/core/lib/channel/handshaker_registry.c )