Generate toSVGGradient|Graphics|PolyElement()

Source/core/svg/SVGGraphicsElement.h

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 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 58 matching lines @@
 
     // SVGTests
     virtual void synchronizeRequiredFeatures() { SVGTests::synchronizeRequiredFeatures(this); }
     virtual void synchronizeRequiredExtensions() { SVGTests::synchronizeRequiredExtensions(this); }
     virtual void synchronizeSystemLanguage() { SVGTests::synchronizeSystemLanguage(this); }
 
     // Used by <animateMotion>
     OwnPtr<AffineTransform> m_supplementalTransform;
 };
 
-inline SVGGraphicsElement* toSVGGraphicsElement(Node* node)
+inline bool isSVGGraphicsElement(const Node& node)
 {
-    ASSERT_WITH_SECURITY_IMPLICATION(!node || node->isSVGElement());
-    ASSERT_WITH_SECURITY_IMPLICATION(!node || toSVGElement(node)->isSVGGraphicsElement());
-    return static_cast<SVGGraphicsElement*>(node);
+    return node.isSVGElement() && toSVGElement(node).isSVGGraphicsElement();
 }
 
+DEFINE_NODE_TYPE_CASTS_WITH_FUNCTION(SVGGraphicsElement);
+
 } // namespace WebCore
 
 #endif // SVGGraphicsElement_h