[Experiment] purge-and-suspend

third_party/WebKit/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 1240 matching lines @@
         return;
     case Revalidate:
         ++m_revalidateCount;
         return;
     case Use:
         ++m_useCount;
         return;
     }
 }
 
+void ResourceFetcher::purgeMemory()
+{
+    if (isFetching())
+        stopFetching();
+    m_documentResources.clear();
+    m_validatedURLs.clear();
+    clearPreloads(ClearAllPreloads);
+}
+
 DEFINE_TRACE(ResourceFetcher)
 {
     visitor->trace(m_context);
     visitor->trace(m_archive);
     visitor->trace(m_loaders);
     visitor->trace(m_nonBlockingLoaders);
     visitor->trace(m_documentResources);
     visitor->trace(m_preloads);
     visitor->trace(m_resourceTimingInfoMap);
 }
 
 } // namespace blink