Release Oilpan heap singletons prior to LSan leak detection.

third_party/WebKit/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 979 matching lines @@
         if (nextPriority.visibility == ResourcePriority::NotVisible)
             continue;
         priority.visibility = ResourcePriority::Visible;
         priority.intraPriorityValue += nextPriority.intraPriorityValue;
     }
     return priority;
 }
 
 Resource::ResourceCallback* Resource::ResourceCallback::callbackHandler()
 {
+    // Oilpan + LSan: as the callbackHandler() singleton is used by Resource
+    // and ResourcePtr finalizers, it cannot be released upon shutdown in
+    // preparation for leak detection.
+    //
+    // Keep it out of LSan's reach instead.
+    LSAN_LEAK_SCOPE;
     DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<ResourceCallback>, callbackHandler, (adoptPtrWillBeNoop(new ResourceCallback)));
     return callbackHandler.get();
 }
 
 DEFINE_TRACE(Resource::ResourceCallback)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_resourcesWithPendingClients);
 #endif
 }
@@ skipping 143 matching lines @@
         return "ImportResource";
     case Resource::Media:
         return "Media";
     }
     ASSERT_NOT_REACHED();
     return "Unknown";
 }
 #endif // !LOG_DISABLED
 
 } // namespace blink