Update worker classes to use OVERRIDE / FINAL when needed

Source/modules/serviceworkers/ServiceWorkerThread.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 19 matching lines @@
 #ifndef ServiceWorkerThread_h
 #define ServiceWorkerThread_h
 
 #include "core/frame/ContentSecurityPolicy.h"
 #include "core/workers/WorkerThread.h"
 
 namespace WebCore {
 
 struct WorkerThreadStartupData;
 
-class ServiceWorkerThread : public WorkerThread {
+class ServiceWorkerThread FINAL : public WorkerThread {
 public:
     static PassRefPtr<ServiceWorkerThread> create(WorkerLoaderProxy&, WorkerReportingProxy&, PassOwnPtr<WorkerThreadStartupData>);
     virtual ~ServiceWorkerThread();
 
 protected:
     virtual PassRefPtr<WorkerGlobalScope> createWorkerGlobalScope(PassOwnPtr<WorkerThreadStartupData>) OVERRIDE;
 
 private:
     ServiceWorkerThread(WorkerLoaderProxy&, WorkerReportingProxy&, PassOwnPtr<WorkerThreadStartupData>);
 };
 
 } // namespace WebCore
 
 #endif // ServiceWorkerThread_h