Oilpan: fix build after r186729.

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 251 matching lines @@
 {
 }
 
 ResourceFetcher::~ResourceFetcher()
 {
     m_documentLoader = nullptr;
     m_document = nullptr;
 
     clearPreloads();
 
+#if !ENABLE(OILPAN)
     // Make sure no requests still point to this ResourceFetcher
+    // Oilpan: no object reference can be keeping this alive,
+    // so property trivially holds.
     ASSERT(!m_loaders || m_loaders->isEmpty());
+#endif
 }
 
 Resource* ResourceFetcher::cachedResource(const KURL& resourceURL) const
 {
     KURL url = MemoryCache::removeFragmentIdentifierIfNeeded(resourceURL);
     return m_documentResources.get(url).get();
 }
 
 LocalFrame* ResourceFetcher::frame() const
 {
@@ skipping 1290 matching lines @@
 
 void ResourceFetcher::trace(Visitor* visitor)
 {
     visitor->trace(m_document);
     visitor->trace(m_loaders);
     visitor->trace(m_nonBlockingLoaders);
     ResourceLoaderHost::trace(visitor);
 }
 
 }