Refactoring: Introduce ResouceLoaderHost interface for unloading ResourceLoader.

Source/core/loader/cache/CachedResource.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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
@@ skipping 163 matching lines @@
     // FIXME: It's unfortunate that the cache layer and below get to know anything about fragment identifiers.
     // We should look into removing the expectation of that knowledge from the platform network stacks.
     ResourceRequest request(m_resourceRequest);
     if (!m_fragmentIdentifierForRequest.isNull()) {
         KURL url = request.url();
         url.setFragmentIdentifier(m_fragmentIdentifierForRequest);
         request.setURL(url);
         m_fragmentIdentifierForRequest = String();
     }
 
-    m_loader = ResourceLoader::create(cachedResourceLoader->documentLoader(), this, request, options);
+    m_loader = ResourceLoader::create(cachedResourceLoader, this, request, options);
     if (!m_loader) {
         failBeforeStarting();
         return;
     }
     m_status = Pending;
 }
 
 void CachedResource::checkNotify()
 {
     if (isLoading())
@@ skipping 622 matching lines @@
     if (m_callbackTimer.isActive())
         m_callbackTimer.stop();
 }
 
 void CachedResource::CachedResourceCallback::timerFired(Timer<CachedResourceCallback>*)
 {
     m_resource->didAddClient(m_client);
 }
 
 }