Update web classes to use OVERRIDE / FINAL when needed

Source/web/MIDIClientProxy.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 24 matching lines @@
 #include "wtf/PassRefPtr.h"
 
 namespace WebCore {
 class MIDIAccess;
 }
 
 namespace blink {
 
 class WebMIDIClient;
 
-class MIDIClientProxy : public WebCore::MIDIClient {
+class MIDIClientProxy FINAL : public WebCore::MIDIClient {
 public:
     explicit MIDIClientProxy(WebMIDIClient*);
 
     // WebCore::MIDIClient
-    virtual void requestSysExPermission(PassRefPtr<WebCore::MIDIAccess>);
-    virtual void cancelSysExPermissionRequest(WebCore::MIDIAccess*);
+    virtual void requestSysExPermission(PassRefPtr<WebCore::MIDIAccess>) OVERRIDE;
+    virtual void cancelSysExPermissionRequest(WebCore::MIDIAccess*) OVERRIDE;
 
 private:
     WebMIDIClient* m_client;
 };
 
 } // namespace blink
 
 #endif // MIDIClientProxy_h