Update modules classes to use OVERRIDE / FINAL when needed

Source/modules/webmidi/MIDIMessageEvent.h

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 28 matching lines @@
 struct MIDIMessageEventInit : public EventInit {
     MIDIMessageEventInit()
         : receivedTime(0.0)
     {
     };
 
     double receivedTime;
     RefPtr<Uint8Array> data;
 };
 
-class MIDIMessageEvent : public Event {
+class MIDIMessageEvent FINAL : public Event {
 public:
     static PassRefPtr<MIDIMessageEvent> create()
     {
         return adoptRef(new MIDIMessageEvent());
     }
 
     static PassRefPtr<MIDIMessageEvent> create(double receivedTime, PassRefPtr<Uint8Array> data)
     {
         return adoptRef(new MIDIMessageEvent(receivedTime, data));
     }
@@ skipping 31 matching lines @@
         ScriptWrappable::init(this);
     }
 
     double m_receivedTime;
     RefPtr<Uint8Array> m_data;
 };
 
 } // namespace WebCore
 
 #endif // MIDIMessageEvent_h