Oilpan: make DOMWindowProperty a GC mixin.

Source/core/loader/appcache/ApplicationCache.cpp

 /*
  * Copyright (C) 2008, 2009 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 26 matching lines @@
 namespace blink {
 
 ApplicationCache::ApplicationCache(LocalFrame* frame)
     : DOMWindowProperty(frame)
 {
     ApplicationCacheHost* cacheHost = applicationCacheHost();
     if (cacheHost)
         cacheHost->setApplicationCache(this);
 }
 
+void ApplicationCache::trace(Visitor* visitor)
+{
+    EventTargetWithInlineData::trace(visitor);
+    DOMWindowProperty::trace(visitor);
+}
+
 void ApplicationCache::willDestroyGlobalObjectInFrame()
 {
     if (ApplicationCacheHost* cacheHost = applicationCacheHost())
         cacheHost->setApplicationCache(0);
     DOMWindowProperty::willDestroyGlobalObjectInFrame();
 }
 
 ApplicationCacheHost* ApplicationCache::applicationCacheHost() const
 {
     if (!m_frame || !m_frame->loader().documentLoader())
@@ skipping 60 matching lines @@
     case ApplicationCacheHost::CACHED_EVENT:
         return EventTypeNames::cached;
     case ApplicationCacheHost::OBSOLETE_EVENT:
         return EventTypeNames::obsolete;
     }
     ASSERT_NOT_REACHED();
     return EventTypeNames::error;
 }
 
 } // namespace blink