Move isValid implementations into SVGGraphicsElement

Source/core/svg/SVGImageElement.h

 /*
  * Copyright (C) 2004, 2005, 2006, 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 28 matching lines @@
     bool currentFrameHasSingleSecurityOrigin() const;
 
     SVGAnimatedLength* x() const { return m_x.get(); }
     SVGAnimatedLength* y() const { return m_y.get(); }
     SVGAnimatedLength* width() const { return m_width.get(); }
     SVGAnimatedLength* height() const { return m_height.get(); }
 
 private:
     explicit SVGImageElement(Document&);
 
-    virtual bool isValid() const OVERRIDE { return SVGTests::isValid(); }
     virtual bool isStructurallyExternal() const OVERRIDE { return !hrefCurrentValue().isNull(); }
     virtual bool supportsFocus() const OVERRIDE { return hasFocusEventListeners(); }
 
     bool isSupportedAttribute(const QualifiedName&);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual bool isPresentationAttribute(const QualifiedName&) const OVERRIDE;
     virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) OVERRIDE;
     virtual void svgAttributeChanged(const QualifiedName&) OVERRIDE;
 
     virtual void attach(const AttachContext& = AttachContext()) OVERRIDE;
@@ skipping 18 matching lines @@
     END_DECLARE_ANIMATED_PROPERTIES
 
     SVGImageLoader m_imageLoader;
 };
 
 DEFINE_NODE_TYPE_CASTS(SVGImageElement, hasTagName(SVGNames::imageTag));
 
 } // namespace WebCore
 
 #endif