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

ui/events/gesture_event_details.h

Index: ui/events/gesture_event_details.h
diff --git a/ui/events/gesture_event_details.h b/ui/events/gesture_event_details.h
index 907a940ead868748be92cd5c062abe0fc440ab30..2b066d56188c5a7ae999492165d8e74b81b8734f 100644
--- a/ui/events/gesture_event_details.h
+++ b/ui/events/gesture_event_details.h
@@ -43,15 +43,6 @@
   GestureDeviceType device_type() const { return device_type_; }
   void set_device_type(GestureDeviceType device_type) {
     device_type_ = device_type;
-  }
-
-  bool is_source_touch_event_set_non_blocking() const {
-    return is_source_touch_event_set_non_blocking_;
-  }
-  void set_is_source_touch_event_set_non_blocking(
-      bool is_source_touch_event_set_non_blocking) {
-    is_source_touch_event_set_non_blocking_ =
-        is_source_touch_event_set_non_blocking;
   }
 
   int touch_points() const { return touch_points_; }
@@ -234,8 +225,6 @@
 
   GestureDeviceType device_type_;
 
-  bool is_source_touch_event_set_non_blocking_ = false;
-
   int touch_points_;  // Number of active touch points in the gesture.
 
   // Bounding box is an axis-aligned rectangle that contains all the