Update Event classes to use OVERRIDE / FINAL when needed

Source/core/events/OverflowEvent.h

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 20 matching lines @@
 namespace WebCore {
 
 struct OverflowEventInit : public EventInit {
     OverflowEventInit();
 
     unsigned short orient;
     bool horizontalOverflow;
     bool verticalOverflow;
 };
 
-class OverflowEvent : public Event {
+class OverflowEvent FINAL : public Event {
 public:
     enum orientType {
         HORIZONTAL = 0,
         VERTICAL   = 1,
         BOTH       = 2
     };
 
     static PassRefPtr<OverflowEvent> create()
     {
         return adoptRef(new OverflowEvent);
     }
     static PassRefPtr<OverflowEvent> create(bool horizontalOverflowChanged, bool horizontalOverflow, bool verticalOverflowChanged, bool verticalOverflow)
     {
         return adoptRef(new OverflowEvent(horizontalOverflowChanged, horizontalOverflow, verticalOverflowChanged, verticalOverflow));
     }
     static PassRefPtr<OverflowEvent> create(const AtomicString& type, const OverflowEventInit& initializer)
     {
         return adoptRef(new OverflowEvent(type, initializer));
     }
 
     void initOverflowEvent(unsigned short orient, bool horizontalOverflow, bool verticalOverflow);
 
     unsigned short orient() const { return m_orient; }
     bool horizontalOverflow() const { return m_horizontalOverflow; }
     bool verticalOverflow() const { return m_verticalOverflow; }
 
-    virtual const AtomicString& interfaceName() const;
+    virtual const AtomicString& interfaceName() const OVERRIDE;
 
 private:
     OverflowEvent();
     OverflowEvent(bool horizontalOverflowChanged, bool horizontalOverflow, bool verticalOverflowChanged, bool verticalOverflow);
     OverflowEvent(const AtomicString&, const OverflowEventInit&);
 
     unsigned short m_orient;
     bool m_horizontalOverflow;
     bool m_verticalOverflow;
 };
 
 }
 
 #endif // OverflowEvent_h