Use TreeScope::completeURL and baseURL instead of the Document versions

Source/core/svg/SVGUseElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
  * Copyright (C) 2011 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  * Copyright (C) 2012 University of Szeged
  * Copyright (C) 2012 Renata Hodovan <reni@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 205 matching lines @@
         || attrName == SVGNames::heightAttr) {
         updateRelativeLengthsInformation();
         if (renderer)
             RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
         return;
     }
 
     if (SVGURIReference::isKnownAttribute(attrName)) {
         bool isExternalReference = isExternalURIReference(hrefCurrentValue(), document());
         if (isExternalReference) {
-            KURL url = document().completeURL(hrefCurrentValue());
+            KURL url = treeScope().completeURL(hrefCurrentValue());
             if (url.hasFragmentIdentifier()) {
                 FetchRequest request(ResourceRequest(url.string()), localName());
                 setDocumentResource(document().fetcher()->fetchSVGDocument(request));
             }
         } else {
             setDocumentResource(0);
         }
 
         if (!m_wasInsertedByParser)
             buildPendingResource();
@@ skipping 746 matching lines @@
 
     if (m_resource)
         m_resource->removeClient(this);
 
     m_resource = resource;
     if (m_resource)
         m_resource->addClient(this);
 }
 
 }