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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CLASS_REQUIRES_TRACE_METHOD_H_
      6 #define CLASS_REQUIRES_TRACE_METHOD_H_
      7 
      8 #include "heap/stubs.h"
      9 
     10 namespace WebCore {
     11 
     12 class HeapObject;
     13 
     14 class PartObject {
     15     DISALLOW_ALLOCATION();
     16 private:
     17     Member<HeapObject> m_obj;
     18 };
     19 
     20 class HeapObject : public GarbageCollected<HeapObject> {
     21 private:
     22     PartObject m_part;
     23 };
     24 
     25 }
     26 
     27 #endif
     28