Move isValid implementations into SVGGraphicsElement

Source/core/svg/SVGSVGElement.h

 /*
  * Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 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 31 matching lines @@
 
 class SVGSVGElement FINAL : public SVGGraphicsElement,
                             public SVGFitToViewBox,
                             public SVGZoomAndPan {
 public:
     static PassRefPtr<SVGSVGElement> create(Document&);
 
     using SVGGraphicsElement::ref;
     using SVGGraphicsElement::deref;
 
-    virtual bool isValid() const OVERRIDE { return SVGTests::isValid(); }
     virtual bool supportsFocus() const OVERRIDE { return hasFocusEventListeners(); }
 
     // 'SVGSVGElement' functions
     const AtomicString& contentScriptType() const;
     void setContentScriptType(const AtomicString& type);
 
     const AtomicString& contentStyleType() const;
     void setContentStyleType(const AtomicString& type);
 
     SVGRect viewport() const;
@@ skipping 123 matching lines @@
 inline bool isSVGSVGElement(const Node& node)
 {
     return node.isSVGElement() && toSVGElement(node).isSVGSVGElement();
 }
 
 DEFINE_NODE_TYPE_CASTS_WITH_FUNCTION(SVGSVGElement);
 
 } // namespace WebCore
 
 #endif