private void OnNavigationCompleted(IWebViewControl sender, Windows.Web.UI.WebViewControlNavigationCompletedEventArgs args)
        {
            // When Source set to null or navigating to stream/string, we navigate to "about:blank" internally.
            if (NavigatingToAboutBlank)
            {
                Verify.Implies(NavigatingToAboutBlank, Source == null || Source == WebViewDefaults.AboutBlankUri);

                // Make sure we pass null in the event args
                var a = new WebViewControlNavigationCompletedEventArgs(args, null);
                OnNavigationCompleted(a);
            }
            else
            {
                OnNavigationCompleted(args);
            }
        }
 private void OnFrameNavigationCompleted(IWebViewControl sender, Windows.Web.UI.WebViewControlNavigationCompletedEventArgs args)
 {
     // TODO: Need to handle frame navigation like NavigationCompleted?
     OnFrameNavigationCompleted(args);
 }