message: Fix and re-enable cwise ops benchmark.
diff: @@ -184,7 +184,8 @@ Graph* CubeWithMulSquare(int num) {
  void BM_##DEVICE##_Cube_##Impl(::testing::benchmark::State& state) { \
  const int num = state.range(0); \
  \
  - test::Benchmark(#DEVICE, Impl(num)).Run(state.iterations()); \
  + test::Benchmark(#DEVICE, Impl(num), /*old_benchmark_api*/ false) \
  + .Run(state); \
  const int64 tot = static_cast<int64>(state.iterations()) * num; \
  state.SetItemsProcessed(tot); \
  state.SetBytesProcessed(tot * sizeof(float)); \
  