Remove resource type-specific fetching logic from ResourceFetcher

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 209 matching lines @@
         return;
     }
 
     if (SVGURIReference::isKnownAttribute(attrName)) {
         SVGElement::InvalidationGuard invalidationGuard(this);
         bool isExternalReference = isExternalURIReference(hrefString(), document());
         if (isExternalReference) {
             KURL url = document().completeURL(hrefString());
             if (url.hasFragmentIdentifier()) {
                 FetchRequest request(ResourceRequest(url), localName());
-                setDocumentResource(document().fetcher()->fetchSVGDocument(request));
+                setDocumentResource(DocumentResource::fetchSVGDocument(request, document().fetcher()));
             }
         } else {
             setDocumentResource(0);
         }
 
         invalidateShadowTree();
 
         return;
     }
 
@@ skipping 533 matching lines @@
 
     if (m_resource)
         m_resource->removeClient(this);
 
     m_resource = resource;
     if (m_resource)
         m_resource->addClient(this);
 }
 
 }