Remove resource type-specific fetching logic from ResourceFetcher

Source/core/fetch/DocumentResource.cpp

 /*
     Copyright (C) 2010 Rob Buis <rwlbuis@gmail.com>
     Copyright (C) 2011 Cosmin Truta <ctruta@gmail.com>
     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
     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,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Library General Public License for more details.
 
     You should have received a copy of the GNU Library General Public License
     along with this library; see the file COPYING.LIB.  If not, write to
     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
 */
 
 #include "config.h"
 
 #include "core/fetch/DocumentResource.h"
 
 #include "core/dom/XMLDocument.h"
+#include "core/fetch/FetchRequest.h"
+#include "core/fetch/ResourceFetcher.h"
 #include "platform/SharedBuffer.h"
 #include "wtf/text/StringBuilder.h"
 
 namespace blink {
 
+ResourcePtr<DocumentResource> DocumentResource::fetchSVGDocument(FetchRequest& request, ResourceFetcher* fetcher)
+{
+    ASSERT(request.resourceRequest().frameType() == WebURLRequest::FrameTypeNone);
+    request.mutableResourceRequest().setRequestContext(WebURLRequest::RequestContextImage);
+    return toDocumentResource(fetcher->requestResource(request, SVGDocumentResourceFactory()));
+}
+
 DocumentResource::DocumentResource(const ResourceRequest& request, Type type)
     : Resource(request, type)
     , m_decoder(TextResourceDecoder::create("application/xml"))
 {
     // FIXME: We'll support more types to support HTMLImports.
     ASSERT(type == SVGDocument);
 }
 
 DocumentResource::~DocumentResource()
 {
@@ skipping 34 matching lines @@
     case SVGDocument:
         return XMLDocument::createSVG(DocumentInit(url));
     default:
         // FIXME: We'll add more types to support HTMLImports.
         ASSERT_NOT_REACHED();
         return nullptr;
     }
 }
 
 }