message: Add missing cc_api_version arg to proto library.
diff: @@ -437,6 +437,7 @@ tf_py_test(
  tf_proto_library(
  name = "tensor_tracer_proto",
  srcs = ["tensor_tracer.proto"],
  + cc_api_version = 2,
  protodeps = [
  "//tensorflow/core:protos_all",
  ],
  