Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/chromeos/audio/audio_handler.h

 // Copyright (c) 2012 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 CHROME_BROWSER_CHROMEOS_AUDIO_AUDIO_HANDLER_H_
 #define CHROME_BROWSER_CHROMEOS_AUDIO_AUDIO_HANDLER_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/prefs/public/pref_change_registrar.h"
 #include "base/threading/thread.h"
 
 template <typename T> struct DefaultSingletonTraits;
 
 class PrefChangeRegistrar;
 class PrefService;
+class PrefServiceSimple;
 
 namespace chromeos {
 
 class AudioMixer;
 
 class AudioHandler {
  public:
   class VolumeObserver {
    public:
     virtual void OnVolumeChanged() = 0;
     virtual void OnMuteToggled() = 0;
    protected:
     VolumeObserver() {}
     virtual ~VolumeObserver() {}
     DISALLOW_COPY_AND_ASSIGN(VolumeObserver);
   };
 
   static void Initialize();
   static void Shutdown();
 
   // Same as Initialize but using the specified audio mixer.  It takes
   // ownership of |mixer|.
   static void InitializeForTesting(AudioMixer* mixer);
 
   // GetInstance returns NULL if not initialized or if already shutdown.
   static AudioHandler* GetInstance();
 
   // Registers volume and mute preferences.
-  static void RegisterPrefs(PrefService* local_state);
+  static void RegisterPrefs(PrefServiceSimple* local_state);
 
   // Gets volume level in our internal 0-100% range, 0 being pure silence.
   double GetVolumePercent();
 
   // Sets volume level from 0-100%. If less than kMuteThresholdPercent, then
   // mutes the sound. If it was muted, and |volume_percent| is larger than
   // the threshold, then the sound is unmuted.
   void SetVolumePercent(double volume_percent);
 
   // Adjusts volume up (positive percentage) or down (negative percentage).
@@ skipping 41 matching lines @@
   PrefService* local_state_;  // not owned
 
   PrefChangeRegistrar pref_change_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_AUDIO_AUDIO_HANDLER_H_