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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.
#ifndef COMPONENTS_UNDO_UNDO_MANAGER_OBSERVER_H_
#define COMPONENTS_UNDO_UNDO_MANAGER_OBSERVER_H_
// Observer for the UndoManager.
class UndoManagerObserver {
public:
// Invoked when the internal state of the UndoManager has changed.
virtual void OnUndoManagerStateChange() = 0;
protected:
virtual ~UndoManagerObserver() {}
};
#endif // COMPONENTS_UNDO_UNDO_MANAGER_OBSERVER_H_
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