Introduce isSVGFontElement() and isSVGImageElement(), and use them

Source/core/svg/SVGLocatable.cpp

 /*
  * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  * Copyright (C) 2009 Google, Inc.  All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. 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.
@@ skipping 10 matching lines @@
  */
 
 #include "config.h"
 
 #include "core/svg/SVGLocatable.h"
 
 #include "SVGNames.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/rendering/RenderObject.h"
 #include "core/svg/SVGGraphicsElement.h"
+#include "core/svg/SVGImageElement.h"
 
 namespace WebCore {
 
 static bool isViewportElement(Node* node)
 {
     return (node->hasTagName(SVGNames::svgTag)
         || node->hasTagName(SVGNames::symbolTag)
         || node->hasTagName(SVGNames::foreignObjectTag)
-        || node->hasTagName(SVGNames::imageTag));
+        || isSVGImageElement(node));
 }
 
 SVGElement* SVGLocatable::nearestViewportElement(const SVGElement* element)
 {
     ASSERT(element);
     for (Element* current = element->parentOrShadowHostElement(); current; current = current->parentOrShadowHostElement()) {
         if (isViewportElement(current))
             return toSVGElement(current);
     }
 
@@ skipping 58 matching lines @@
             ec = InvalidStateError;
             return ctm;
         }
         ctm = targetCTM.inverse() * ctm;
     }
 
     return ctm;
 }
 
 }