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

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 4f3daf4d27d020f8828555a092172e7b077524d8..8e24e6d7b0170c33d3b7140c313eba5f1bd3638b 100644
--- a/ui/events/gestures/gesture_recognizer.h
+++ b/ui/events/gestures/gesture_recognizer.h
@@ -37,6 +37,7 @@
   // the queue which matches with unique_event_id.
   virtual Gestures AckTouchEvent(uint32_t unique_event_id,
                                  ui::EventResult result,
+                                 bool is_source_touch_event_set_non_blocking,
                                  GestureConsumer* consumer) = 0;
 
   // This is called when the consumer is destroyed. So this should cleanup any