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

Source/core/svg/SVGAnimatedEnumerationBase.h

 /*
  * Copyright (C) 2014 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 21 matching lines @@
 #define SVGAnimatedEnumerationBase_h
 
 #include "core/svg/SVGEnumeration.h"
 #include "core/svg/properties/SVGAnimatedProperty.h"
 
 namespace blink {
 
 class SVGAnimatedEnumerationBase : public SVGAnimatedProperty<SVGEnumerationBase> {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    virtual ~SVGAnimatedEnumerationBase();
+    ~SVGAnimatedEnumerationBase() override;
 
     void setBaseVal(unsigned short, ExceptionState&);
 
 protected:
     SVGAnimatedEnumerationBase(SVGElement* contextElement, const QualifiedName& attributeName, PassRefPtrWillBeRawPtr<SVGEnumerationBase> initialValue)
         : SVGAnimatedProperty<SVGEnumerationBase>(contextElement, attributeName, initialValue)
     {
     }
 };
 
 } // namespace blink
 
 #endif // SVGAnimatedEnumerationBase_h