Have Document::accessSVGExtensions() return a reference

Source/core/svg/SVGSVGElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 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.
  *
@@ skipping 88 matching lines @@
     return adoptRef(new SVGSVGElement(document));
 }
 
 SVGSVGElement::~SVGSVGElement()
 {
     if (m_viewSpec)
         m_viewSpec->detachContextElement();
 
     // There are cases where removedFromDocument() is not called.
     // see ContainerNode::removeAllChildren, called by its destructor.
-    document().accessSVGExtensions()->removeTimeContainer(this);
+    document().accessSVGExtensions().removeTimeContainer(this);
 
-    ASSERT(inDocument() || !accessDocumentSVGExtensions()->isSVGRootWithRelativeLengthDescendents(this));
+    ASSERT(inDocument() || !accessDocumentSVGExtensions().isSVGRootWithRelativeLengthDescendents(this));
 }
 
 const AtomicString& SVGSVGElement::contentScriptType() const
 {
     DEFINE_STATIC_LOCAL(const AtomicString, defaultValue, ("text/ecmascript", AtomicString::ConstructFromLiteral));
     const AtomicString& n = fastGetAttribute(SVGNames::contentScriptTypeAttr);
     return n.isNull() ? defaultValue : n;
 }
 
 void SVGSVGElement::setContentScriptType(const AtomicString& type)
@@ skipping 362 matching lines @@
         return new RenderSVGRoot(this);
 
     return new RenderSVGViewportContainer(this);
 }
 
 Node::InsertionNotificationRequest SVGSVGElement::insertedInto(ContainerNode* rootParent)
 {
     if (rootParent->inDocument()) {
         UseCounter::count(document(), UseCounter::SVGSVGElementInDocument);
 
-        document().accessSVGExtensions()->addTimeContainer(this);
+        document().accessSVGExtensions().addTimeContainer(this);
 
         // Animations are started at the end of document parsing and after firing the load event,
         // but if we miss that train (deferred programmatic element insertion for example) we need
         // to initialize the time container here.
         if (!document().parsing() && !document().processingLoadEvent() && document().loadEventFinished() && !timeContainer()->isStarted())
             timeContainer()->begin();
     }
     return SVGGraphicsElement::insertedInto(rootParent);
 }
 
 void SVGSVGElement::removedFrom(ContainerNode* rootParent)
 {
     if (rootParent->inDocument()) {
-        SVGDocumentExtensions* svgExtensions = document().accessSVGExtensions();
-        svgExtensions->removeTimeContainer(this);
-        svgExtensions->removeSVGRootWithRelativeLengthDescendents(this);
+        SVGDocumentExtensions& svgExtensions = document().accessSVGExtensions();
+        svgExtensions.removeTimeContainer(this);
+        svgExtensions.removeSVGRootWithRelativeLengthDescendents(this);
     }
 
     SVGGraphicsElement::removedFrom(rootParent);
 }
 
 void SVGSVGElement::pauseAnimations()
 {
     if (!m_timeContainer->isPaused())
         m_timeContainer->pause();
 }
@@ skipping 259 matching lines @@
     Vector<Element*>::const_iterator end = elements.end();
     for (Vector<Element*>::const_iterator it = elements.begin(); it != end; ++it) {
         if ((*it)->isDescendantOf(this))
             return *it;
     }
 
     return 0;
 }
 
 }