Standardize usage of virtual/override/final in ui/

ui/events/test/mock_motion_event.h

Index: ui/events/test/mock_motion_event.h
diff --git a/ui/events/test/mock_motion_event.h b/ui/events/test/mock_motion_event.h
index 5c34b71a365288deaa7604ffba44210a111e8dd7..d04d7154eab7f90b0ee13541d4951cc83519e666 100644
--- a/ui/events/test/mock_motion_event.h
+++ b/ui/events/test/mock_motion_event.h
@@ -37,11 +37,11 @@ struct MockMotionEvent : public MotionEventGeneric {
                   const std::vector<gfx::PointF>& positions);
   MockMotionEvent(const MockMotionEvent& other);
 
-  virtual ~MockMotionEvent();
+  ~MockMotionEvent() override;
 
   // MotionEvent methods.
-  virtual scoped_ptr<MotionEvent> Clone() const override;
-  virtual scoped_ptr<MotionEvent> Cancel() const override;
+  scoped_ptr<MotionEvent> Clone() const override;
+  scoped_ptr<MotionEvent> Cancel() const override;
 
   // Utility methods.
   void PressPoint(float x, float y);