Generate toSVGGradient|Graphics|PolyElement()

Source/core/svg/SVGPolyElement.h

 /*
  * Copyright (C) 2004, 2005, 2006, 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 46 matching lines @@
     static PassRefPtr<SVGAnimatedProperty> lookupOrCreatePointsWrapper(SVGElement* contextElement);
 
     mutable SVGSynchronizableAnimatedProperty<SVGPointList> m_points;
 
 private:
     BEGIN_DECLARE_ANIMATED_PROPERTIES(SVGPolyElement)
         DECLARE_ANIMATED_BOOLEAN(ExternalResourcesRequired, externalResourcesRequired)
     END_DECLARE_ANIMATED_PROPERTIES
 };
 
-inline SVGPolyElement* toSVGPolyElement(SVGElement* element)
+inline bool isSVGPolyElement(const Node& node)
 {
-    ASSERT_WITH_SECURITY_IMPLICATION(!element || element->hasTagName(SVGNames::polygonTag) || element->hasTagName(SVGNames::polylineTag));
-    return static_cast<SVGPolyElement*>(element);
+    return node.hasTagName(SVGNames::polygonTag) || node.hasTagName(SVGNames::polylineTag);
 }
 
+DEFINE_NODE_TYPE_CASTS_WITH_FUNCTION(SVGPolyElement);
+
 } // namespace WebCore
 
 #endif