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 BASE_CLASS_MUST_DEFINE_VIRTUAL_TRACE_H_ 6 #define BASE_CLASS_MUST_DEFINE_VIRTUAL_TRACE_H_ 7 8 #include "heap/stubs.h" 9 10 namespace blink { 11 12 class PartBase { 13 DISALLOW_ALLOCATION(); 14 // Missing virtual trace. 15 }; 16 17 class PartDerived : public PartBase { 18 DISALLOW_ALLOCATION(); 19 public: 20 virtual void trace(Visitor*); 21 }; 22 23 class HeapBase : public GarbageCollected<HeapBase> { 24 // Missing virtual trace. 25 }; 26 27 28 class HeapDerived : public HeapBase { 29 public: 30 virtual void trace(Visitor*); 31 private: 32 PartDerived m_part; 33 }; 34 35 36 } 37 38 #endif 39
