It's going to be removed from Chromium, see https://crbug.com/812523.

/cc @electron/code-owners 
shell/browser/api/electron_api_app.cc
std::string result_code;
    switch (val) {
      case JumpListResult::SUCCESS:
        result_code = "ok";
        break;
      case JumpListResult::ARGUMENT_ERROR:
        result_code = "argumentError";
        break;
      case JumpListResult::GENERIC_ERROR:
        result_code = "error";
        break;
      case JumpListResult::CUSTOM_CATEGORY_SEPARATOR_ERROR:
        result_code = "invalidSeparatorError";
        break;
      case JumpListResult::MISSING_FILE_TYPE_REGISTRATION_ERROR:
        result_code = "fileTypeRegistrationError";
        break;
      case JumpListResult::CUSTOM_CATEGORY_ACCESS_DENIED_ERROR:
        result_code = "customCategoryAccessDeniedError";
        break;
    }
    return ConvertToV8(isolate, result_code);
  }
};
#endif
template <>
struct Converter<Browser::LoginItemSettings> {
  static bool FromV8(v8::Isolate* isolate,