Standardize usage of virtual/override/final in ui/

ui/events/gesture_detection/scale_gesture_listeners.h

Index: ui/events/gesture_detection/scale_gesture_listeners.h
diff --git a/ui/events/gesture_detection/scale_gesture_listeners.h b/ui/events/gesture_detection/scale_gesture_listeners.h
index 583ef7ea06e4ba20addc1a7788c52a3a5bea0fdf..a976f470b686159f946fbbaaef8fe3a782073dcf 100644
--- a/ui/events/gesture_detection/scale_gesture_listeners.h
+++ b/ui/events/gesture_detection/scale_gesture_listeners.h
@@ -34,12 +34,9 @@ class GESTURE_DETECTION_EXPORT SimpleScaleGestureListener
     : public ScaleGestureListener {
  public:
   // ScaleGestureListener implementation.
-  virtual bool OnScale(const ScaleGestureDetector&,
-                       const MotionEvent&) override;
-  virtual bool OnScaleBegin(const ScaleGestureDetector&,
-                            const MotionEvent&) override;
-  virtual void OnScaleEnd(const ScaleGestureDetector&,
-                          const MotionEvent&) override;
+  bool OnScale(const ScaleGestureDetector&, const MotionEvent&) override;
+  bool OnScaleBegin(const ScaleGestureDetector&, const MotionEvent&) override;
+  void OnScaleEnd(const ScaleGestureDetector&, const MotionEvent&) override;
 };
 
 }  // namespace ui