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

Source/modules/indexeddb/IDBVersionChangeEvent.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 43 matching lines @@
     {
         return adoptRefWillBeNoop(new IDBVersionChangeEvent(eventType, initializer));
     }
 
     unsigned long long oldVersion() const { return m_oldVersion; }
     unsigned long long newVersion(bool& isNull) const;
 
     const AtomicString& dataLoss() const;
     const String& dataLossMessage() const { return m_dataLossMessage; }
 
-    virtual const AtomicString& interfaceName() const override;
+    const AtomicString& interfaceName() const override;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     IDBVersionChangeEvent();
     IDBVersionChangeEvent(const AtomicString& eventType, unsigned long long oldVersion, const Nullable<unsigned long long>& newVersion, WebIDBDataLoss, const String& dataLoss);
     IDBVersionChangeEvent(const AtomicString& eventType, const IDBVersionChangeEventInit&);
 
     unsigned long long m_oldVersion;
     Nullable<unsigned long long> m_newVersion;
     WebIDBDataLoss m_dataLoss;
     String m_dataLossMessage;
 };
 
 } // namespace blink
 
 #endif // IDBVersionChangeEvent_h