@Override
  protected DefaultCefContextMenuHandler createDefaultContextMenuHandler() {
    return new DefaultCefContextMenuHandler() {
      @Override
      public void onBeforeContextMenu(CefBrowser browser, CefFrame frame, CefContextMenuParams params, CefMenuModel model) {
        model.clear();
        super.onBeforeContextMenu(browser, frame, params, model);
      }
    };
  }
@Override
  protected DefaultCefContextMenuHandler createDefaultContextMenuHandler()