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

Source/core/svg/SVGFontFaceUriElement.cpp

 /*
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 77 matching lines @@
     return SVGElement::insertedInto(rootParent);
 }
 
 void SVGFontFaceUriElement::loadFont()
 {
     if (m_resource)
         m_resource->removeClient(this);
 
     const AtomicString& href = getAttribute(XLinkNames::hrefAttr);
     if (!href.isNull()) {
-        ResourceFetcher* fetcher = document()->fetcher();
-        FetchRequest request(ResourceRequest(document()->completeURL(href)), localName());
+        ResourceFetcher* fetcher = document().fetcher();
+        FetchRequest request(ResourceRequest(document().completeURL(href)), localName());
         m_resource = fetcher->fetchFont(request);
         if (m_resource) {
             m_resource->addClient(this);
             m_resource->beginLoadIfNeeded(fetcher);
         }
     } else {
         m_resource = 0;
     }
 }
 
 }
 
 #endif // ENABLE(SVG_FONTS)