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

ui/events/gestures/gesture_recognizer_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_EVENTS_GESTURES_GESTURE_RECOGNIZER_IMPL_H_
 #define UI_EVENTS_GESTURES_GESTURE_RECOGNIZER_IMPL_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 42 matching lines @@
  private:
   // Sets up the target consumer for gestures based on the touch-event.
   void SetupTargets(const TouchEvent& event, GestureConsumer* consumer);
 
   void DispatchGestureEvent(GestureEvent* event);
 
   // Overridden from GestureRecognizer
   bool ProcessTouchEventPreDispatch(TouchEvent* event,
                                     GestureConsumer* consumer) override;
 
-  Gestures* AckAsyncTouchEvent(const TouchEvent& event,
-                               ui::EventResult result,
+  Gestures* AckAsyncTouchEvent(ui::EventResult result,
                                GestureConsumer* consumer) override;
 
   Gestures* AckSyncTouchEvent(const uint64 unique_event_id,
                               ui::EventResult result,
                               GestureConsumer* consumer) override;
 
   bool CleanupStateForConsumer(GestureConsumer* consumer) override;
   void AddGestureEventHelper(GestureEventHelper* helper) override;
   void RemoveGestureEventHelper(GestureEventHelper* helper) override;
 
@@ skipping 17 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(GestureRecognizerImpl);
 };
 
 // Provided only for testing:
 EVENTS_EXPORT void SetGestureRecognizerForTesting(
     GestureRecognizer* gesture_recognizer);
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_GESTURES_GESTURE_RECOGNIZER_IMPL_H_