Re-enable Eager Gesture Recognition on Aura

ui/aura/window_event_dispatcher.h

Index: ui/aura/window_event_dispatcher.h
diff --git a/ui/aura/window_event_dispatcher.h b/ui/aura/window_event_dispatcher.h
index a93c5d857a2cb19588f177b46f05d6f940267ca4..4b5b1f4ae4b91adb7655fc86c248e2975e016793 100644
--- a/ui/aura/window_event_dispatcher.h
+++ b/ui/aura/window_event_dispatcher.h
@@ -120,6 +120,10 @@ class AURA_EXPORT WindowEventDispatcher : public ui::EventProcessor,
   //             observer.
   void OnPostNotifiedWindowDestroying(Window* window);
 
+  // Called when a Window wants to process a touch event asynchronously. Returns
+  // false if the event should not be forwarded.
+  bool OnProcessingTouchEventAsync(ui::TouchEvent* event);
+
  private:
   FRIEND_TEST_ALL_PREFIXES(WindowEventDispatcherTest,
                            KeepTranslatedEventInRoot);