[VSync Queue] Plug touch ack to gesture events and flush vsync queue if necessary

ui/events/gestures/gesture_provider_aura.h

Index: ui/events/gestures/gesture_provider_aura.h
diff --git a/ui/events/gestures/gesture_provider_aura.h b/ui/events/gestures/gesture_provider_aura.h
index 4fa90ac22c63f1ddfd03eb490d7299ebea91c43f..fc7bdab0a32f03ff08147a8a58363dd898dc55c1 100644
--- a/ui/events/gestures/gesture_provider_aura.h
+++ b/ui/events/gestures/gesture_provider_aura.h
@@ -42,7 +42,9 @@ class EVENTS_EXPORT GestureProviderAura : public GestureProviderClient {
   }
 
   bool OnTouchEvent(TouchEvent* event);
-  void OnTouchEventAck(uint32_t unique_touch_event_id, bool event_consumed);
+  void OnTouchEventAck(uint32_t unique_touch_event_id,
+                       bool event_consumed,
+                       bool is_source_touch_event_set_non_blocking);
   const MotionEventAura& pointer_state() { return pointer_state_; }
   std::vector<std::unique_ptr<GestureEvent>> GetAndResetPendingGestures();
   void OnTouchEnter(int pointer_id, float x, float y);