Cef 屏蔽页面右键菜单

void CCefBrowserEventHandler::OnBeforeContextMenu(CefRefPtr< CefBrowser > browser, CefRefPtr< CefFrame > frame, CefRefPtr< CefContextMenuParams > params, CefRefPtr< CefMenuModel > model)OVERRIDE  
{
  CEF_REQUIRE_UI_THREAD();
    if ((params->GetTypeFlags() & (CM_TYPEFLAG_PAGE | CM_TYPEFLAG_FRAME)) != 0) {
        if (model->GetCount() > 0)
        {
            model->Clear();
            //model->AddSeparator();
        }
    }
}

bool CCefBrowserEventHandler::OnContextMenuCommand(CefRefPtr< CefBrowser > browser, CefRefPtr< CefFrame > frame, CefRefPtr< CefContextMenuParams > params, int command_id, CefContextMenuHandler::EventFlags event_flags) OVERRIDE
{
    CEF_REQUIRE_UI_THREAD();
     return false;
}

为什么右键还是会显示菜单？求大神指定

没有重写 GetContextMenuHandle,你这个函数都不会回调到这