Remove ResourceFetcher's access to a real FetchContext at frame detach time

Source/core/loader/DocumentLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * 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 89 matching lines @@
 }
 
 ResourceLoader* DocumentLoader::mainResourceLoader() const
 {
     return m_mainResource ? m_mainResource->loader() : 0;
 }
 
 DocumentLoader::~DocumentLoader()
 {
     ASSERT(!m_frame || !isLoading());
-    static_cast<FrameFetchContext&>(m_fetcher->context()).clearDocumentLoader();
     clearMainResourceHandle();
     m_applicationCacheHost->dispose();
 }
 
 unsigned long DocumentLoader::mainResourceIdentifier() const
 {
     return m_mainResource ? m_mainResource->identifier() : 0;
 }
 
 Document* DocumentLoader::document() const
@@ skipping 434 matching lines @@
 void DocumentLoader::detachFromFrame()
 {
     ASSERT(m_frame);
     RefPtrWillBeRawPtr<LocalFrame> protectFrame(m_frame);
     RefPtr<DocumentLoader> protectLoader(this);
 
     // It never makes sense to have a document loader that is detached from its
     // frame have any loads active, so go ahead and kill all the loads.
     stopLoading();
 
+    m_fetcher->clearContext();
     m_applicationCacheHost->setApplicationCache(0);
     InspectorInstrumentation::loaderDetachedFromFrame(m_frame, this);
     m_frame = 0;
 }
 
 void DocumentLoader::clearMainResourceLoader()
 {
     m_loadingMainResource = false;
 }
 
@@ skipping 208 matching lines @@
 // This is only called by FrameLoader::replaceDocumentWhileExecutingJavaScriptURL()
 void DocumentLoader::replaceDocumentWhileExecutingJavaScriptURL(const DocumentInit& init, const String& source, Document* ownerDocument)
 {
     m_writer = createWriterFor(ownerDocument, init, mimeType(), m_writer ? m_writer->encoding() : emptyAtom, true, ForceSynchronousParsing);
     if (!source.isNull())
         m_writer->appendReplacingData(source);
     endWriting(m_writer.get());
 }
 
 } // namespace blink