Delete NetworkingContext and its subclasses.

Source/core/loader/ResourceLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2010, 2011 Apple Inc. All rights reserved.
  *           (C) 2007 Graham Dennis (graham.dennis@gmail.com)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer. 
@@ skipping 141 matching lines @@
     ASSERT(m_deferredRequest.isNull());
 
     m_documentLoader->applicationCacheHost()->willStartLoadingResource(m_request);
 
     if (m_defersLoading) {
         m_deferredRequest = m_request;
         return;
     }
 
     if (m_state != Terminated)
-        m_handle = ResourceHandle::create(m_frame->loader()->networkingContext(), m_request, this, m_defersLoading, m_options.sniffContent == SniffContent, m_options.allowCredentials);
+        m_handle = ResourceHandle::create(m_request, this, m_defersLoading, m_options.sniffContent == SniffContent, m_options.allowCredentials);
 }
 
 void ResourceLoader::setDefersLoading(bool defers)
 {
     m_defersLoading = defers;
     if (m_handle)
         m_handle->setDefersLoading(defers);
     if (!defers && !m_deferredRequest.isNull()) {
         m_request = m_deferredRequest;
         m_deferredRequest = ResourceRequest();
@@ skipping 255 matching lines @@
     info.addMember(m_request, "request");
     info.addMember(m_originalRequest, "originalRequest");
     info.addMember(m_deferredRequest, "deferredRequest");
     info.addMember(m_options, "options");
     info.addMember(m_resource, "resource");
     info.addMember(m_documentLoader, "documentLoader");
     info.addMember(m_requestCountTracker, "requestCountTracker");
 }
 
 }