Generate the isSVG*Element() / toSVG*Element() helper functions

Source/core/svg/SVGElement.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef SVGElement_h
 #define SVGElement_h
 
+#include "SVGElementTypeHelpers.h"
 #include "core/dom/Element.h"
 #include "core/svg/SVGAnimatedString.h"
 #include "core/svg/SVGParsingError.h"
 #include "core/svg/properties/SVGPropertyInfo.h"
 #include "platform/Timer.h"
 #include "wtf/HashMap.h"
 #include "wtf/OwnPtr.h"
 
 namespace WebCore {
 
@@ skipping 189 matching lines @@
             QualifiedNameComponents components = { nullAtom.impl(), key.localName().impl(), key.namespaceURI().impl() };
             return hashComponents(components);
         }
         return DefaultHash<QualifiedName>::Hash::hash(key);
     }
     static bool equal(const QualifiedName& a, const QualifiedName& b) { return a.matches(b); }
 };
 
 DEFINE_NODE_TYPE_CASTS(SVGElement, isSVGElement());
 
+// Template specialization to make Traversal<SVGElement> work.
+template <> inline bool isElementOfType<const SVGElement>(const Element& element) { return element.isSVGElement(); }
+
 }
 
 #endif