Method ~CApiGradientsTest

tensorflow/c/c_api_test.cc:1526–1530

        expected_graph_(TF_NewGraph()) {}

  ~CApiGradientsTest() override {
    TF_DeleteGraph(graph_);
    TF_DeleteGraph(expected_graph_);
    TF_DeleteStatus(s_);
  }

  void TestGradientsSuccess(bool grad_inputs_provided) {
    TF_Output inputs[2];