Have Node::document() return a reference instead of a pointer

Source/core/svg/SVGScriptElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007 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 140 matching lines @@
 
 void SVGScriptElement::setType(const String& type)
 {
     m_type = type;
 }
 
 void SVGScriptElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const
 {
     SVGElement::addSubresourceAttributeURLs(urls);
 
-    addSubresourceURL(urls, document()->completeURL(hrefCurrentValue()));
+    addSubresourceURL(urls, document().completeURL(hrefCurrentValue()));
 }
 
 String SVGScriptElement::sourceAttributeValue() const
 {
     return hrefCurrentValue();
 }
 
 String SVGScriptElement::charsetAttributeValue() const
 {
     return String();
@@ skipping 29 matching lines @@
     return false;
 }
 
 bool SVGScriptElement::hasSourceAttribute() const
 {
     return hasAttribute(XLinkNames::hrefAttr);
 }
 
 PassRefPtr<Element> SVGScriptElement::cloneElementWithoutAttributesAndChildren()
 {
-    return adoptRef(new SVGScriptElement(tagQName(), document(), false, m_loader->alreadyStarted()));
+    return adoptRef(new SVGScriptElement(tagQName(), &document(), false, m_loader->alreadyStarted()));
 }
 
 void SVGScriptElement::setHaveFiredLoadEvent(bool haveFiredLoadEvent)
 {
     m_loader->setHaveFiredLoadEvent(haveFiredLoadEvent);
 }
 
 bool SVGScriptElement::isParserInserted() const
 {
     return m_loader->isParserInserted();
 }
 
 bool SVGScriptElement::haveFiredLoadEvent() const
 {
     return m_loader->haveFiredLoadEvent();
 }
 
 Timer<SVGElement>* SVGScriptElement::svgLoadEventTimer()
 {
     return &m_svgLoadEventTimer;
 }
 
 }