Update modules classes to use OVERRIDE / FINAL when needed

Source/modules/quota/StorageErrorCallback.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 29 matching lines @@
 
 class DOMError;
 
 typedef int ExceptionCode;
 
 class StorageErrorCallback {
 public:
     virtual ~StorageErrorCallback() { }
     virtual void handleEvent(DOMError*) = 0;
 
-    class CallbackTask : public ExecutionContextTask {
+    class CallbackTask FINAL : public ExecutionContextTask {
     public:
         static PassOwnPtr<CallbackTask> create(PassOwnPtr<StorageErrorCallback> callback, ExceptionCode ec)
         {
             return adoptPtr(new CallbackTask(callback, ec));
         }
 
-        virtual void performTask(ExecutionContext*);
+        virtual void performTask(ExecutionContext*) OVERRIDE;
 
     private:
         CallbackTask(PassOwnPtr<StorageErrorCallback>, ExceptionCode);
 
         OwnPtr<StorageErrorCallback> m_callback;
         ExceptionCode m_ec;
     };
 };
 
 } // namespace WebCore
 
 #endif // StorageErrorCallback_h