Update worker classes to use OVERRIDE / FINAL when needed

Source/modules/serviceworkers/ServiceWorkerGlobalScope.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 22 matching lines @@
 #include "bindings/v8/ScriptPromiseResolver.h"
 #include "core/dom/Promise.h"
 #include "core/workers/WorkerGlobalScope.h"
 #include "wtf/Assertions.h"
 
 namespace WebCore {
 
 class ServiceWorkerThread;
 struct WorkerThreadStartupData;
 
-class ServiceWorkerGlobalScope : public WorkerGlobalScope {
+class ServiceWorkerGlobalScope FINAL : public WorkerGlobalScope {
 public:
     static PassRefPtr<ServiceWorkerGlobalScope> create(ServiceWorkerThread*, PassOwnPtr<WorkerThreadStartupData>);
 
     virtual ~ServiceWorkerGlobalScope();
     virtual bool isServiceWorkerGlobalScope() const OVERRIDE { return true; }
 
     // EventTarget
     virtual const AtomicString& interfaceName() const OVERRIDE;
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(install);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(activate);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(fetch);
 
 private:
     ServiceWorkerGlobalScope(const KURL&, const String& userAgent, ServiceWorkerThread*, double timeOrigin, PassOwnPtr<WorkerClients>);
 };
 }
 
 #endif // ServiceWorkerGlobalScope_h