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// 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.
#include "base_requires_tracing.h"
namespace blink {
void A::Trace(Visitor* visitor) { }
void C::Trace(Visitor* visitor) {
visitor->Trace(m_a);
// Missing B::trace(visitor)
}
void D::Trace(Visitor* visitor) {
visitor->Trace(m_a);
C::Trace(visitor);
}
}
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