Make manual isSVG*Element() helpers as efficient as the generated ones

Source/core/svg/SVGGradientElement.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 55 matching lines @@
 private:
     virtual bool needsPendingResourceHandling() const OVERRIDE FINAL { return false; }
 
     virtual void childrenChanged(const ChildrenChange&) OVERRIDE FINAL;
 
     RefPtr<SVGAnimatedTransformList> m_gradientTransform;
     RefPtr<SVGAnimatedEnumeration<SVGSpreadMethodType> > m_spreadMethod;
     RefPtr<SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType> > m_gradientUnits;
 };
 
-inline bool isSVGGradientElement(const Node& node)
+inline bool isSVGGradientElement(const SVGElement& element)
 {
-    return node.hasTagName(SVGNames::radialGradientTag) || node.hasTagName(SVGNames::linearGradientTag);
+    return element.hasTagName(SVGNames::radialGradientTag) || element.hasTagName(SVGNames::linearGradientTag);
 }
 
-DEFINE_ELEMENT_TYPE_CASTS_WITH_FUNCTION(SVGGradientElement);
+DEFINE_SVGELEMENT_TYPE_CASTS_WITH_FUNCTION(SVGGradientElement);
 
 } // namespace blink
 
 #endif