text: // Copyright 2014 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef PURE_VIRTUAL_TRACE_H_
  #define PURE_VIRTUAL_TRACE_H_
  
  #include "heap/stubs.h"
  
  namespace blink {
  
  class A : public GarbageCollected<A> {
  public:
      virtual void trace(Visitor*) = 0;
  };
  
  }
  
  #endif
  