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

Source/core/svg/SVGClipPathElement.h

 /*
  * Copyright (C) 2004, 2005, 2007, 2008 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 20 matching lines @@
 namespace blink {
 
 class LayoutObject;
 
 class SVGClipPathElement final : public SVGGraphicsElement {
     DEFINE_WRAPPERTYPEINFO();
 public:
     DECLARE_NODE_FACTORY(SVGClipPathElement);
     SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>* clipPathUnits() { return m_clipPathUnits.get(); }
 
-    virtual bool supportsFocus() const override { return false; }
+    bool supportsFocus() const override { return false; }
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     explicit SVGClipPathElement(Document&);
 
-    virtual bool needsPendingResourceHandling() const override { return false; }
+    bool needsPendingResourceHandling() const override { return false; }
 
-    virtual void svgAttributeChanged(const QualifiedName&) override;
-    virtual void childrenChanged(const ChildrenChange&) override;
+    void svgAttributeChanged(const QualifiedName&) override;
+    void childrenChanged(const ChildrenChange&) override;
 
-    virtual LayoutObject* createLayoutObject(const ComputedStyle&) override;
+    LayoutObject* createLayoutObject(const ComputedStyle&) override;
 
     RefPtrWillBeMember<SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>> m_clipPathUnits;
 };
 
 } // namespace blink
 
 #endif // SVGClipPathElement_h