message: De-flake summary_interface_test - give unique name to each test.
diff: @@ -32,6 +32,9 @@ Status SummaryTestHelper(
  const string& test_name,
  std::function<Status(SummaryWriterInterface*)> writer_fn,
  std::function<void(const Event&)> test_fn) {
  + static std::set<string>* tests = new std::set<string>();
  + CHECK(tests->insert(test_name).second) << ": " << test_name;
  +
  SummaryWriterInterface* writer;
  Env* env = Env::Default();
  TF_CHECK_OK(
  @@ -147,7 +150,7 @@ TEST(SummaryInterfaceTest, WriteImage) {
  TEST(SummaryInterfaceTest, WriteAudio) {
  TF_CHECK_OK(SummaryTestHelper(
  - "scalar_test",
  + "audio_test",
  [](SummaryWriterInterface* writer) {
  Tensor one(DT_FLOAT, TensorShape({1, 1}));
  one.scalar<float>()() = 1.0;
  