Remove support for the externalResourcesRequired attribute.

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 13 matching lines @@
 
 #include "SVGNames.h"
 #include "core/rendering/svg/RenderSVGHiddenContainer.h"
 #include "core/rendering/svg/RenderSVGResource.h"
 #include "core/rendering/svg/RenderSVGTransformableContainer.h"
 #include "core/svg/SVGElementInstance.h"
 
 namespace WebCore {
 
 // Animated property definitions
-DEFINE_ANIMATED_BOOLEAN(SVGGElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)
 
 BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGGElement)
-    REGISTER_LOCAL_ANIMATED_PROPERTY(externalResourcesRequired)
     REGISTER_PARENT_ANIMATED_PROPERTIES(SVGGraphicsElement)
 END_REGISTER_ANIMATED_PROPERTIES
 
 SVGGElement::SVGGElement(Document& document, ConstructionType constructionType)
     : SVGGraphicsElement(SVGNames::gTag, document, constructionType)
 {
     ScriptWrappable::init(this);
     registerAnimatedPropertiesForSVGGElement();
 }
 
 PassRefPtr<SVGGElement> SVGGElement::create(Document& document)
 {
     return adoptRef(new SVGGElement(document));
 }
 
 bool SVGGElement::isSupportedAttribute(const QualifiedName& attrName)
 {
     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, 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;
-    } else if (SVGExternalResourcesRequired::parseAttribute(name, value)) {
-        return;
     }
 
     ASSERT_NOT_REACHED();
 }
 
 void SVGGElement::svgAttributeChanged(const QualifiedName& attrName)
 {
     if (!isSupportedAttribute(attrName)) {
         SVGGraphicsElement::svgAttributeChanged(attrName);
         return;
@@ skipping 18 matching lines @@
 }
 
 bool SVGGElement::rendererIsNeeded(const RenderStyle&)
 {
     // Unlike SVGElement::rendererIsNeeded(), we still create renderers, even if
     // display is set to 'none' - which is special to SVG <g> container elements.
     return parentOrShadowHostElement() && parentOrShadowHostElement()->isSVGElement();
 }
 
 }