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 PURE_VIRTUAL_TRACE_H_
6 #define PURE_VIRTUAL_TRACE_H_
7 
8 #include "heap/stubs.h"
9 
10 namespace blink {
11 
12 class A : public GarbageCollected<A> {
13 public:
14     virtual void Trace(Visitor*) = 0;
15 };
16 
17 }
18 
19 #endif
20