C++ CEF（Chromium Embedded Framework）用户代理错误和xFF1F；c++；

例如，我的代码是：

// Returns the application settings based on command line arguments.
void AppGetSettings(CefSettings& settings) {
  ASSERT(g_command_line.get());
if (!g_command_line.get())
   return;
  CefString str;
#if defined(OS_WIN)
  settings.multi_threaded_message_loop =
      g_command_line->HasSwitch(cefclient::kMultiThreadedMessageLoop);
#endif

CefString(&settings.locale).FromASCII("zh-cn");
  SystemSetting ss;

  CefString(&settings.cache_path) = L"cache";
  // Specify a port to enable DevTools if one isn't already specified.
  if (!g_command_line->HasSwitch("remote-debugging-port"))
     settings.remote_debugging_port = 8088;

std::wstring wversion = ss.ReadConfigSection(L"version", L"currentVersion");
  std::string version;
  CommonUtil::WStringToString(wversion, version);
  std::string tempStr = "Mozilla/5.0 (Windows NT 6.3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.138 Safari/537.36 testuser_agent/";
  tempStr = tempStr.append(version);
  CefString(&settings.user_agent).FromString(tempStr);

  std::wstring logSeverity = ss.ReadConfigSection(L"config", L"logSeverity");
  if (!logSeverity.empty())
  {
     if (logSeverity == L"LOGSEVERITY_DEFAULT")
        settings.log_severity = cef_log_severity_t::LOGSEVERITY_DEFAULT;
     else if (logSeverity == L"LOGSEVERITY_VERBOSE")
        settings.log_severity = cef_log_severity_t::LOGSEVERITY_VERBOSE;
     else if (logSeverity == L"LOGSEVERITY_INFO")
        settings.log_severity = cef_log_severity_t::LOGSEVERITY_INFO;
     else if (logSeverity == L"LOGSEVERITY_WARNING")
        settings.log_severity = cef_log_severity_t::LOGSEVERITY_WARNING;
     else if (logSeverity == L"LOGSEVERITY_ERROR")
        settings.log_severity = cef_log_severity_t::LOGSEVERITY_ERROR;
     else if (logSeverity == L"LOGSEVERITY_DISABLE")
        settings.log_severity = cef_log_severity_t::LOGSEVERITY_DISABLE;
  }
  else
     settings.log_severity = cef_log_severity_t::LOGSEVERITY_DISABLE;

  if (g_command_line->HasSwitch(cefclient::kOffScreenRenderingEnabled))
    settings.windowless_rendering_enabled = true;
}

但是在

 #define CHROME_VERSION_MAJOR 35 

失败了，但其他版本成功了，这是CEF的错误吗？ CefString（&settings.user\u agent）.FromString（tempStr）； 这是成功的另一个版本，是我的错误吗？但为什么只有这一个是失败的？和我是寻找了很多资料，但不是帮助？谁能帮助我，非常感谢