Bug 966493 - Mark touchstart and end events as handling user input. r=smaug

layout/base/nsPresShell.cpp

@@ -7585,6 +7585,7 @@ PresShell::HandleEventInternal(WidgetEvent* aEvent, nsEventStatus* aStatus)
         isHandlingUserInput = true;
         break;
       case NS_TOUCH_START: {
+        isHandlingUserInput = true;
         WidgetTouchEvent* touchEvent = aEvent->AsTouchEvent();
         // if there is only one touch in this touchstart event, assume that it is
         // the start of a new touch session and evict any old touches in the
@@ -7609,8 +7610,10 @@ PresShell::HandleEventInternal(WidgetEvent* aEvent, nsEventStatus* aStatus)
         }
         break;
       }
-      case NS_TOUCH_CANCEL:
-      case NS_TOUCH_END: {
+      case NS_TOUCH_END:
+        isHandlingUserInput = true;
+        // Fall through to touchcancel code
+      case NS_TOUCH_CANCEL: {
         // Remove the changed touches
         // need to make sure we only remove touches that are ending here
         WidgetTouchEvent* touchEvent = aEvent->AsTouchEvent();