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

ui/events/gesture_detection/gesture_event_data_packet.h

 // Copyright 2014 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_GESTURE_DETECTION_GESTURE_EVENT_DATA_PACKET_H_
 #define UI_EVENTS_GESTURE_DETECTION_GESTURE_EVENT_DATA_PACKET_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 43 matching lines @@
 
   const base::TimeTicks& timestamp() const { return timestamp_; }
   const GestureEventData& gesture(size_t i) const { return gestures_[i]; }
   size_t gesture_count() const { return gestures_->size(); }
   GestureSource gesture_source() const { return gesture_source_; }
   const gfx::PointF& touch_location() const { return touch_location_; }
   const gfx::PointF& raw_touch_location() const { return raw_touch_location_; }
 
   // We store the ack with the packet until the packet reaches the
   // head of the queue, and then we handle the ack.
-  void Ack(bool event_consumed);
+  void Ack(bool event_consumed, bool is_source_touch_event_set_non_blocking);
   AckState ack_state() { return ack_state_; }
   uint32_t unique_touch_event_id() const { return unique_touch_event_id_; }
 
  private:
   GestureEventDataPacket(base::TimeTicks timestamp,
                          GestureSource source,
                          const gfx::PointF& touch_location,
                          const gfx::PointF& raw_touch_location,
                          uint32_t unique_touch_event_id);
 
   enum { kTypicalMaxGesturesPerTouch = 5 };
   base::TimeTicks timestamp_;
   base::StackVector<GestureEventData, kTypicalMaxGesturesPerTouch> gestures_;
   gfx::PointF touch_location_;
   gfx::PointF raw_touch_location_;
   GestureSource gesture_source_;
   AckState ack_state_;
   uint32_t unique_touch_event_id_;
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_GESTURE_DETECTION_GESTURE_EVENT_DATA_PACKET_H_