Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/chromeos/settings/device_settings_cache.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_SETTINGS_DEVICE_SETTINGS_CACHE_H_
 #define CHROME_BROWSER_CHROMEOS_SETTINGS_DEVICE_SETTINGS_CACHE_H_
 
 namespace enterprise_management {
 class PolicyData;
 }
 
 class PrefService;
+class PrefServiceSimple;
 
 namespace chromeos {
 
 // There is need (metrics at OOBE stage) to store settings (that normally would
 // go into DeviceSettings storage) before owner has been assigned (hence no key
 // is available). This set of functions serves as a transient storage in that
 // case.
 namespace device_settings_cache {
 // Registers required pref section.
-void RegisterPrefs(PrefService* local_state);
+void RegisterPrefs(PrefServiceSimple* local_state);
 
 // Stores a new policy blob inside the cache stored in |local_state|.
 bool Store(const enterprise_management::PolicyData &policy,
            PrefService* local_state);
 
 // Retrieves the policy blob from the cache stored in |local_state|.
 bool Retrieve(enterprise_management::PolicyData *policy,
               PrefService* local_state);
 
 // Call this after owner has been assigned to persist settings into
 // DeviceSettings storage.
 void Finalize(PrefService* local_state);
 }  // namespace device_settings_cache
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_SETTINGS_DEVICE_SETTINGS_CACHE_H_