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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 CHROME_BROWSER_UNDO_UNDO_MANAGER_OBSERVER_H_ | |
6 #define CHROME_BROWSER_UNDO_UNDO_MANAGER_OBSERVER_H_ | |
7 | |
8 // Observer for the UndoManager. | |
9 class UndoManagerObserver { | |
10 public: | |
11 // Invoked when the internal state of the UndoManager has changed. | |
12 virtual void OnUndoManagerStateChange() = 0; | |
13 | |
14 protected: | |
15 virtual ~UndoManagerObserver() {} | |
16 }; | |
17 | |
18 #endif // CHROME_BROWSER_UNDO_UNDO_MANAGER_OBSERVER_H_ | |
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