Oilpan: turn DOMWindow into a heap supplementable.

Source/modules/crypto/DOMWindowCrypto.h

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 22 matching lines @@
 
 #include "core/frame/DOMWindowProperty.h"
 #include "heap/Handle.h"
 #include "platform/Supplementable.h"
 
 namespace WebCore {
 
 class Crypto;
 class DOMWindow;
 
-class DOMWindowCrypto FINAL : public Supplement<DOMWindow>, public DOMWindowProperty {
+class DOMWindowCrypto FINAL : public NoBaseWillBeGarbageCollectedFinalized<DOMWindowCrypto>, public WillBeHeapSupplement<DOMWindow>, public DOMWindowProperty {
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DOMWindowCrypto);
 public:
     virtual ~DOMWindowCrypto();
     static DOMWindowCrypto& from(DOMWindow&);
     static Crypto* crypto(DOMWindow&);
     Crypto* crypto() const;
 
+    void trace(Visitor*);
+
 private:
     explicit DOMWindowCrypto(DOMWindow&);
     static const char* supplementName();
 
-    mutable RefPtrWillBePersistent<Crypto> m_crypto;
+    mutable RefPtrWillBeMember<Crypto> m_crypto;
 };
 
 } // namespace WebCore
 
 #endif // DOMWindowCrypto_h