Let SVGElement handle SVGLangSpace attributes parsing

Source/core/svg/SVGGElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2007, 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 36 matching lines @@
 }
 
 PassRefPtr<SVGGElement> SVGGElement::create(const QualifiedName& tagName, Document* document)
 {
     return adoptRef(new SVGGElement(tagName, document));
 }
 
 bool SVGGElement::isSupportedAttribute(const QualifiedName& attrName)
 {
     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
-    if (supportedAttributes.isEmpty()) {
-        SVGLangSpace::addSupportedAttributes(supportedAttributes);
+    if (supportedAttributes.isEmpty())
         SVGExternalResourcesRequired::addSupportedAttributes(supportedAttributes);
-    }
     return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
 }
 
 void SVGGElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
 {
     if (!isSupportedAttribute(name)) {
         SVGGraphicsElement::parseAttribute(name, value);
         return;
     }
 
     if (SVGLangSpace::parseAttribute(name, value))
         return;
-    if (SVGExternalResourcesRequired::parseAttribute(name, value))
-        return;
 
     ASSERT_NOT_REACHED();
 }
 
 void SVGGElement::svgAttributeChanged(const QualifiedName& attrName)
 {
     if (!isSupportedAttribute(attrName)) {
         SVGGraphicsElement::svgAttributeChanged(attrName);
         return;
     }
@@ skipping 17 matching lines @@
 }
 
 bool SVGGElement::rendererIsNeeded(const NodeRenderingContext&)
 {
     // Unlike SVGStyledElement::rendererIsNeeded(), we still create renderers, even if
     // display is set to 'none' - which is special to SVG <g> container elements.
     return parentOrShadowHostElement() && parentOrShadowHostElement()->isSVGElement();
 }
 
 }