1// Copyright (c) 2012 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 BASE_PREFS_PREF_OBSERVER_H_
6#define BASE_PREFS_PREF_OBSERVER_H_
7
8#include <string>
9
10class PrefService;
11
12// Used internally to the Prefs subsystem to pass preference change
13// notifications between PrefService, PrefNotifierImpl and
14// PrefChangeRegistrar.
15class PrefObserver {
16 public:
17  virtual void OnPreferenceChanged(PrefService* service,
18                                   const std::string& pref_name) = 0;
19};
20
21#endif  // BASE_PREFS_PREF_OBSERVER_H_
22