[oilpan] Don't notify CachedResourceClients of cancel events when detaching the frame.

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 457 matching lines @@
 
 CachedMetadata* CachedResource::cachedMetadata(unsigned dataTypeID) const
 {
     if (!m_cachedMetadata || m_cachedMetadata->dataTypeID() != dataTypeID)
         return 0;
     return m_cachedMetadata.get();
 }
 
 void CachedResource::stopLoading()
 {
-    ASSERT(m_loader);            
+    ASSERT(m_loader);
+    bool isFrameDetaching = m_loader->frameLoader()->isFrameDetaching();
     m_loader = 0;
+    // Don't notify clients if the frame is being torn down.
+    if (isFrameDetaching)
+        return;
 
     CachedResourceHandle<CachedResource> protect(this);
 
     // All loads finish with finish() or error(), except for
     // canceled loads, which silently set our request to 0. Be sure to notify our
     // client in that case, so we don't seem to continue loading forever.
     if (isLoading()) {
         setLoading(false);
         setStatus(LoadError);
         checkNotify();
@@ skipping 456 matching lines @@
     info.addMember(m_proxyResource, "proxyResource");
     info.addMember(m_handlesToRevalidate, "handlesToRevalidate");
     info.addMember(m_options, "options");
     info.addMember(m_decodedDataDeletionTimer, "decodedDataDeletionTimer");
     info.ignoreMember(m_clientsAwaitingCallback);
 
     if (m_purgeableData && !m_purgeableData->wasPurged())
         info.addRawBuffer(m_purgeableData.get(), m_purgeableData->size(), "PurgeableData", "purgeableData");
 }
 }