Fix virtual/override/final usage in Source/core/html/.

Source/core/html/PublicURLManager.h

 /*
  * Copyright (C) 2012 Motorola Mobility Inc.
  *
  * 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 34 matching lines @@
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(PublicURLManager);
     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(PublicURLManager);
 public:
     static PassOwnPtrWillBeRawPtr<PublicURLManager> create(ExecutionContext*);
 
     void registerURL(SecurityOrigin*, const KURL&, URLRegistrable*, const String& uuid = String());
     void revoke(const KURL&);
     void revoke(const String& uuid);
 
     // ActiveDOMObject interface.
-    virtual void stop() override;
+    void stop() override;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     explicit PublicURLManager(ExecutionContext*);
 
     // One or more URLs can be associated with the same unique ID.
     // Objects need be revoked by unique ID in some cases.
     typedef String URLString;
     typedef HashMap<URLString, String> URLMap;
     typedef HashMap<URLRegistry*, URLMap> RegistryURLMap;
 
     RegistryURLMap m_registryToURL;
     bool m_isStopped;
 };
 
 } // namespace blink
 
 #endif // PublicURLManager_h