message: Fix test on Windows
  `tensorflow/tools/benchmark/benchmark_model.cc(237): error C3861: 'Sleep': identifier not found`
diff: @@ -234,7 +234,7 @@ void SleepSeconds(double sleep_seconds) {
  return;
  }
  #ifdef PLATFORM_WINDOWS
  - Sleep(sleep_seconds * 1000);
  + Env::Default()->SleepForMicroseconds(sleep_seconds * 1000 * 1000);
  #else
  // Convert the inference_delay string into a timespec.
  timespec req;
  