Update worker classes to use OVERRIDE / FINAL when needed

Source/core/workers/WorkerMessagingProxy.h

 /*
  * Copyright (C) 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 27 matching lines @@
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
     class WorkerObjectProxy;
     class DedicatedWorkerThread;
     class ExecutionContext;
     class Worker;
     class WorkerClients;
 
-    class WorkerMessagingProxy : public WorkerGlobalScopeProxy, public WorkerLoaderProxy {
+    class WorkerMessagingProxy FINAL : public WorkerGlobalScopeProxy, public WorkerLoaderProxy {
         WTF_MAKE_NONCOPYABLE(WorkerMessagingProxy); WTF_MAKE_FAST_ALLOCATED;
     public:
         WorkerMessagingProxy(Worker*, PassOwnPtr<WorkerClients>);
 
         // Implementations of WorkerGlobalScopeProxy.
         // (Only use these methods in the worker object thread.)
         virtual void startWorkerGlobalScope(const KURL& scriptURL, const String& userAgent, const String& sourceCode, WorkerThreadStartMode) OVERRIDE;
         virtual void terminateWorkerGlobalScope() OVERRIDE;
         virtual void postMessageToWorkerGlobalScope(PassRefPtr<SerializedScriptValue>, PassOwnPtr<MessagePortChannelArray>) OVERRIDE;
         virtual bool hasPendingActivity() const OVERRIDE;
@@ skipping 40 matching lines @@
 
         Vector<OwnPtr<ExecutionContextTask> > m_queuedEarlyTasks; // Tasks are queued here until there's a thread object created.
         WorkerGlobalScopeProxy::PageInspector* m_pageInspector;
 
         OwnPtr<WorkerClients> m_workerClients;
     };
 
 } // namespace WebCore
 
 #endif // WorkerMessagingProxy_h