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 #include "base_requires_tracing.h" 6 7 namespace blink { 8 9 void A::Trace(Visitor* visitor) { } 10 11 void C::Trace(Visitor* visitor) { 12 visitor->Trace(m_a); 13 // Missing B::trace(visitor) 14 } 15 16 void D::Trace(Visitor* visitor) { 17 visitor->Trace(m_a); 18 C::Trace(visitor); 19 } 20 21 } 22
