Update Event classes to use OVERRIDE / FINAL when needed

Source/core/events/MouseRelatedEvent.h

 /*
  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 24 matching lines @@
         // Note that these values are adjusted to counter the effects of zoom, so that values
         // exposed via DOM APIs are invariant under zooming.
         int screenX() const { return m_screenLocation.x(); }
         int screenY() const { return m_screenLocation.y(); }
         const IntPoint& screenLocation() const { return m_screenLocation; }
         int clientX() const { return m_clientLocation.x(); }
         int clientY() const { return m_clientLocation.y(); }
         int webkitMovementX() const { return m_movementDelta.x(); }
         int webkitMovementY() const { return m_movementDelta.y(); }
         const LayoutPoint& clientLocation() const { return m_clientLocation; }
-        int layerX();
-        int layerY();
+        virtual int layerX() OVERRIDE FINAL;
+        virtual int layerY() OVERRIDE FINAL;
         int offsetX();
         int offsetY();
         bool isSimulated() const { return m_isSimulated; }
-        virtual int pageX() const;
-        virtual int pageY() const;
-        virtual const LayoutPoint& pageLocation() const;
+        virtual int pageX() const OVERRIDE FINAL;
+        virtual int pageY() const OVERRIDE FINAL;
+        const LayoutPoint& pageLocation() const;
         int x() const;
         int y() const;
 
         // Page point in "absolute" coordinates (i.e. post-zoomed, page-relative coords,
         // usable with RenderObject::absoluteToLocal).
         const LayoutPoint& absoluteLocation() const { return m_absoluteLocation; }
         void setAbsoluteLocation(const LayoutPoint& p) { m_absoluteLocation = p; }
 
     protected:
         MouseRelatedEvent();
         MouseRelatedEvent(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<AbstractView>,
                           int detail, const IntPoint& screenLocation, const IntPoint& windowLocation,
                           const IntPoint& movementDelta,
                           bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool isSimulated = false);
 
         void initCoordinates();
         void initCoordinates(const LayoutPoint& clientLocation);
-        virtual void receivedTarget();
+        virtual void receivedTarget() OVERRIDE FINAL;
 
         void computePageLocation();
         void computeRelativePosition();
 
         // Expose these so MouseEvent::initMouseEvent can set them.
         IntPoint m_screenLocation;
         LayoutPoint m_clientLocation;
         LayoutPoint m_movementDelta;
 
     private:
         LayoutPoint m_pageLocation;
         LayoutPoint m_layerLocation;
         LayoutPoint m_offsetLocation;
         LayoutPoint m_absoluteLocation;
         bool m_isSimulated;
         bool m_hasCachedRelativePosition;
     };
 
 } // namespace WebCore
 
 #endif // MouseRelatedEvent_h