base/prefs/pref_observer.h

   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
  10 class PrefService;
  11
  12 // Used internally to the Prefs subsystem to pass preference change
  13 // notifications between PrefService, PrefNotifierImpl and
  14 // PrefChangeRegistrar.
  15 class 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_