Dispose ApplicationCacheHost on DocumentLoader finalization.

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 87 matching lines @@
 ResourceLoader* DocumentLoader::mainResourceLoader() const
 {
     return m_mainResource ? m_mainResource->loader() : 0;
 }
 
 DocumentLoader::~DocumentLoader()
 {
     ASSERT(!m_frame || !isLoading());
     m_fetcher->clearDocumentLoader();
     clearMainResourceHandle();
+    m_applicationCacheHost->dispose();
 }
 
 unsigned long DocumentLoader::mainResourceIdentifier() const
 {
     return m_mainResource ? m_mainResource->identifier() : 0;
 }
 
 Document* DocumentLoader::document() const
 {
     if (m_frame && m_frame->loader().documentLoader() == this)
@@ skipping 711 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);
     if (!source.isNull())
         m_writer->appendReplacingData(source);
     endWriting(m_writer.get());
 }
 
 } // namespace blink