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

Source/web/IndexedDBClientImpl.h

 /*
  * Copyright (C) 2011 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:
  *
  * 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
@@ skipping 21 matching lines @@
 #include "modules/indexeddb/IndexedDBClient.h"
 
 namespace blink {
 
 class ExecutionContext;
 
 class IndexedDBClientImpl final : public IndexedDBClient {
 public:
     static IndexedDBClient* create();
 
-    virtual bool allowIndexedDB(ExecutionContext*, const String& name) override;
+    bool allowIndexedDB(ExecutionContext*, const String& name) override;
 
 private:
     IndexedDBClientImpl() { }
 };
 
 } // namespace blink
 
 #endif // IndexedDBClientImpl_h