Oilpan: Prepare to move ResourceLoader and ResourceLoaderSet to Oilpan heap.

Source/core/fetch/Resource.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 139 matching lines @@
     cachedResourceLeakCounter.decrement();
 #endif
 }
 
 void Resource::dispose()
 {
 }
 
 void Resource::trace(Visitor* visitor)
 {
+    visitor->trace(m_loader);
     visitor->trace(m_resourceToRevalidate);
     visitor->trace(m_proxyResource);
 }
 
 void Resource::failBeforeStarting()
 {
     WTF_LOG(ResourceLoading, "Cannot start loading '%s'", url().string().latin1().data());
     error(Resource::LoadError);
 }
 
@@ skipping 835 matching lines @@
         return "ImportResource";
     case Resource::Media:
         return "Media";
     }
     ASSERT_NOT_REACHED();
     return "Unknown";
 }
 #endif // !LOG_DISABLED
 
 }