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

Source/core/dom/DOMURLUtils.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * 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.
@@ skipping 21 matching lines @@
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class KURL;
 
 class CORE_EXPORT DOMURLUtils : public DOMURLUtilsReadOnly {
 public:
     virtual void setURL(const KURL&) = 0;
     virtual void setInput(const String&) = 0;
-    virtual ~DOMURLUtils() { };
+    ~DOMURLUtils() override { };
 
     void setHref(const String&);
 
     void setProtocol(const String&);
     void setUsername(const String&);
     void setPassword(const String&);
     void setHost(const String&);
     void setHostname(const String&);
     void setPort(const String&);
     void setPathname(const String&);
     void setSearch(const String&);
     void setHash(const String&);
 };
 
 } // namespace blink
 
 #endif // DOMURLUtils_h