Commits on Oct 7, 2016

1. Send touch events to root pipeline, and allow forwarding to iframes. …

   Instead of letting the compositor try to find the correct scroll
   layer for a touch event, switch touch events to work the same way
   that mouse events do.
   
   Touch events are now dispatched to the root pipeline, and then
   forwarded to child iframes as required.

   

   gw3583 committed Oct 7, 2016

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