Don't pass touches to gesture recognizer for async acks.

ui/events/gestures/gesture_recognizer.h

Index: ui/events/gestures/gesture_recognizer.h
diff --git a/ui/events/gestures/gesture_recognizer.h b/ui/events/gestures/gesture_recognizer.h
index 5dc58346cefdabc8d9770c244a6383c982e46c7a..6d05b278b231c5932880cbea5a906db2ca8deae9 100644
--- a/ui/events/gestures/gesture_recognizer.h
+++ b/ui/events/gestures/gesture_recognizer.h
@@ -40,8 +40,7 @@ class EVENTS_EXPORT GestureRecognizer {
   // Returns a list of zero or more GestureEvents. The caller is responsible for
   // freeing the returned events. Called when a touch event receives an
   // asynchronous ack.
-  virtual Gestures* ProcessTouchEventOnAsyncAck(const TouchEvent& event,
-                                                ui::EventResult result,
+  virtual Gestures* ProcessTouchEventOnAsyncAck(ui::EventResult result,
                                                 GestureConsumer* consumer) = 0;
 
   // This is called when the consumer is destroyed. So this should cleanup any