message: Fixed an issue about undefined 'use_coreml' benchmark param.
diff: @@ -47,10 +47,14 @@ REGISTER_DELEGATE_PROVIDER(CoreMlDelegateProvider);
  std::vector<Flag> CoreMlDelegateProvider::CreateFlags(
  BenchmarkParams* params) const {
  +#if defined(REAL_IPHONE_DEVICE)
  std::vector<Flag> flags = {
  CreateFlag<bool>("use_coreml", params, "use Core ML"),
  };
  return flags;
  +#else
  + return {};
  +#endif
  }
  void CoreMlDelegateProvider::LogParams(const BenchmarkParams& params) const {
  