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

Source/core/svg/SVGPolyElement.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 26 matching lines @@
     PassRefPtrWillBeRawPtr<SVGPointListTearOff> animatedPoints() { return m_points->animVal(); }
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
     SVGPolyElement(const QualifiedName&, Document&);
 
     Path asPathFromPoints() const;
 
 private:
-    virtual void svgAttributeChanged(const QualifiedName&) override final;
+    void svgAttributeChanged(const QualifiedName&) final;
 
 private:
     RefPtrWillBeMember<SVGAnimatedPointList> m_points;
 
 };
 
 inline bool isSVGPolyElement(const SVGElement& element)
 {
     return element.hasTagName(SVGNames::polygonTag) || element.hasTagName(SVGNames::polylineTag);
 }
 
 DEFINE_SVGELEMENT_TYPE_CASTS_WITH_FUNCTION(SVGPolyElement);
 
 } // namespace blink
 
 #endif