Cefsharp中的弹出处理程序

Question

我尝试在Cefsharp（版本43，Winforms）中处理弹出窗口，因为我需要在弹出窗口中执行一些javascript并导航到其他站点，但是当弹出窗口出现时应用程序开始冻结。另外，我从这个问题How to handle popup links in CefSharp中读到了答案，我试图实现它，我的代码看起来像这样。

 public class LifeSpanHandler : ILifeSpanHandler
{
    public event Action<string> PopupRequest;
    //The other members of this interface I leave empty
    public bool OnBeforePopup(IWebBrowser browserControl, IBrowser browser, IFrame frame, string targetUrl, string targetFrameName, WindowOpenDisposition targetDisposition, bool userGesture, IWindowInfo windowInfo, ref bool noJavascriptAccess, out IWebBrowser newBrowser)
    {
        if (PopupRequest != null)
            PopupRequest(targetUrl);
        newBrowser = browserControl; // here I think is a problem
        return true;
    }
}

 // Here is Form1 class
    private void Button1_Click(object sender, EventArgs e)
    {
        LifeSpanHandler life = new LifeSpanHandler();
        chromiumWebBrowser1.LifeSpanHandler = life;
        life.PopupRequest += life_PopupRequest;     
       chromiumWebBrowser1.Load("http://www.popuptest.com/goodpopups.html");
    }

    void life_PopupRequest(object sender, string e)
    {
        Popup pop = new Popup();
        ChromiumWebBrowser popBrowser = new ChromiumWebBrowser(e);
        pop.Controls.Add(popBrowser);
        pop.Visible = true;
        popBrowser.Dock = DockStyle.Fill;
        popBrowser.Visible = true;
        // here the Application is freezing
    }`

那么如何控制弹出窗口（执行一些javascript并导航到其他站点）？