Fix virtual/override/final usage in Source/web/.

Source/web/WorkerGlobalScopeProxyProviderImpl.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 31 matching lines @@
 
 class WorkerGlobalScopeProxyProviderImpl final : public NoBaseWillBeGarbageCollectedFinalized<WorkerGlobalScopeProxyProviderImpl>, public WorkerGlobalScopeProxyProvider {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(WorkerGlobalScopeProxyProviderImpl);
     WTF_MAKE_NONCOPYABLE(WorkerGlobalScopeProxyProviderImpl);
 public:
     static PassOwnPtrWillBeRawPtr<WorkerGlobalScopeProxyProviderImpl> create()
     {
         return adoptPtrWillBeNoop(new WorkerGlobalScopeProxyProviderImpl());
     }
 
-    virtual ~WorkerGlobalScopeProxyProviderImpl() { }
-    virtual WorkerGlobalScopeProxy* createWorkerGlobalScopeProxy(Worker*) override;
+    ~WorkerGlobalScopeProxyProviderImpl() override { }
+    WorkerGlobalScopeProxy* createWorkerGlobalScopeProxy(Worker*) override;
 
     DEFINE_INLINE_VIRTUAL_TRACE() { WorkerGlobalScopeProxyProvider::trace(visitor); }
 
 private:
     WorkerGlobalScopeProxyProviderImpl() { }
 };
 
 } // namespace blink
 
 #endif // WorkerGlobalScopeProxyProviderImpl_h