// 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 BASE_REQUIRES_TRACING_H_ #define BASE_REQUIRES_TRACING_H_ #include "heap/stubs.h" namespace WebCore { class A : public GarbageCollected<A> { public: virtual void trace(Visitor*); }; class B : public A { // Does not need trace }; class C : public B { public: void trace(Visitor*); private: Member<A> m_a; }; class D : public C { public: void trace(Visitor*); private: Member<A> m_a; }; } #endif