Comment 5 for bug 1459362

Simply sending it a TouchEnd is not the way to go as it would tell WebView that the touch sequence belongs to it and that it should commit whatever UI changes this touch sequence caused to it.

If SwipeArea grabbed the touch, WebView should undo whatever changes that were caused by that touch.

To me it looks like WebView doesn't handle a touch point being grabbed from it and is thus left in a bad state.