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

Source/core/svg/SVGSVGElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2014 Google, Inc.
  *
  * 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.
@@ skipping 160 matching lines @@
     frame->setPageZoomFactor(scale);
 }
 
 class SVGCurrentTranslateTearOff : public SVGPointTearOff {
 public:
     static PassRefPtrWillBeRawPtr<SVGCurrentTranslateTearOff> create(SVGSVGElement* contextElement)
     {
         return adoptRefWillBeNoop(new SVGCurrentTranslateTearOff(contextElement));
     }
 
-    virtual void commitChange() override
+    void commitChange() override
     {
         ASSERT(contextElement());
         toSVGSVGElement(contextElement())->updateCurrentTranslate();
     }
 
 private:
     SVGCurrentTranslateTearOff(SVGSVGElement* contextElement)
         : SVGPointTearOff(contextElement->m_translation, contextElement, PropertyIsNotAnimVal)
     {
     }
@@ skipping 589 matching lines @@
     visitor->trace(m_width);
     visitor->trace(m_height);
     visitor->trace(m_translation);
     visitor->trace(m_timeContainer);
     visitor->trace(m_viewSpec);
     SVGGraphicsElement::trace(visitor);
     SVGFitToViewBox::trace(visitor);
 }
 
 } // namespace blink