message: [Kythe] Comment OutputProto at kythe_proto_output
diff: @@ -59,6 +59,7 @@ Entry ConvertFactToEntry(const Fact& fact) {
  return entry;
  }
  +// Output entry to the stream.
  void OutputProto(const Entry& entry, FileOutputStream* stream) {
  CodedOutputStream coded_stream(stream);
  coded_stream.WriteVarint32(entry.ByteSizeLong());
  