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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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