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

Source/core/svg/SVGDefsElement.h

 /*
  * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 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 13 matching lines @@
 #include "core/svg/SVGAnimatedBoolean.h"
 #include "core/svg/SVGGraphicsElement.h"
 
 namespace blink {
 
 class SVGDefsElement final : public SVGGraphicsElement {
     DEFINE_WRAPPERTYPEINFO();
 public:
     DECLARE_NODE_FACTORY(SVGDefsElement);
 
-    virtual bool supportsFocus() const override { return false; }
+    bool supportsFocus() const override { return false; }
 
 private:
     explicit SVGDefsElement(Document&);
 
-    virtual LayoutObject* createLayoutObject(const ComputedStyle&) override;
+    LayoutObject* createLayoutObject(const ComputedStyle&) override;
 };
 
 } // namespace blink
 
 #endif // SVGDefsElement_h