@Override
      public boolean onBeforeBrowse(CefBrowser browser,
                                    CefFrame frame,
                                    CefRequest request,
                                    boolean user_gesture,
                                    boolean is_redirect) {
        if (user_gesture) {
          BrowserUtil.open(request.getURL());
          return true;
        }
        return false;
      }
@Override
      public boolean onBeforeBrowse(CefBrowser browser,
                                    CefFrame frame,
                                    CefRequest request,
                                    boolean user_gesture,
                                    boolean is_redirect)