Fix virtual/override/final usage in Source/modules/.

Source/modules/webmidi/MIDIConnectionEvent.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 40 matching lines @@
         return adoptRefWillBeNoop(new MIDIConnectionEvent(port));
     }
 
     static PassRefPtrWillBeRawPtr<MIDIConnectionEvent> create(const AtomicString& type, const MIDIConnectionEventInit& initializer)
     {
         return adoptRefWillBeNoop(new MIDIConnectionEvent(type, initializer));
     }
 
     MIDIPort* port() { return m_port; }
 
-    virtual const AtomicString& interfaceName() const override { return EventNames::MIDIConnectionEvent; }
+    const AtomicString& interfaceName() const override { return EventNames::MIDIConnectionEvent; }
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     MIDIConnectionEvent()
         : Event(EventTypeNames::statechange, false, false) { }
 
     MIDIConnectionEvent(MIDIPort* port)
         : Event(EventTypeNames::statechange, false, false)
         , m_port(port) { }
 
     MIDIConnectionEvent(const AtomicString&, const MIDIConnectionEventInit&);
 
     PersistentWillBeMember<MIDIPort> m_port;
 };
 
 } // namespace blink
 
 #endif // MIDIConnectionEvent_h