MemoryCache: make sure that Resources are evicted only when they can be deleted

Source/core/fetch/ResourceFetcher.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) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
     Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
 
     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 1054 matching lines @@
     ASSERT_UNUSED(timer, timer == &m_garbageCollectDocumentResourcesTimer);
     garbageCollectDocumentResources();
 }
 
 void ResourceFetcher::garbageCollectDocumentResources()
 {
     typedef Vector<String, 10> StringVector;
     StringVector resourcesToDelete;
 
     for (DocumentResourceMap::iterator it = m_documentResources.begin(); it != m_documentResources.end(); ++it) {
-        if (it->value->hasOneHandle())
+        if (it->value->hasOneHandleApartFromCache())
             resourcesToDelete.append(it->key);
     }
 
     for (StringVector::const_iterator it = resourcesToDelete.begin(); it != resourcesToDelete.end(); ++it)
         m_documentResources.remove(*it);
 }
 
 void ResourceFetcher::notifyLoadedFromMemoryCache(Resource* resource)
 {
     if (!frame() || !frame()->page() || resource->status() != Resource::Cached || m_validatedURLs.contains(resource->url()))
@@ skipping 309 matching lines @@
     case Revalidate:
         ++m_revalidateCount;
         return;
     case Use:
         ++m_useCount;
         return;
     }
 }
 
 }