message: Fix kokoro test failure by adding necessary protobuf dependencies.
diff: @@ -36,6 +36,7 @@ limitations under the License.
  #include "tensorflow/core/lib/core/status.h"
  #include "tensorflow/core/lib/core/status_test_util.h"
  #include "tensorflow/core/lib/strings/strcat.h"
  +#include "tensorflow/core/platform/protobuf.h"
  #include "tensorflow/core/platform/test.h"
  #include "tensorflow/core/protobuf/config.pb.h" // NOLINT
  #include "tensorflow/core/public/session.h"
  @@ -1123,7 +1124,7 @@ class OpConverterTest : public ::testing::Test {
  };
  template <typename T>
  -void CopyTensorElements(const Tensor& tensor, proto2::RepeatedField<T>* out) {
  +void CopyTensorElements(const Tensor& tensor, protobuf::RepeatedField<T>* out) {
  out->Clear();
  if (tensor.NumElements() == 0) return;
  