Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/chromeos/settings/device_settings_cache.cc

Index: chrome/browser/chromeos/settings/device_settings_cache.cc
diff --git a/chrome/browser/chromeos/settings/device_settings_cache.cc b/chrome/browser/chromeos/settings/device_settings_cache.cc
index 178cbfbb8de9eb35ae3bc070d54b84b6c95bd1e0..d8c57399bf12ae879b0993ad548cbf8a4c2e9868 100644
--- a/chrome/browser/chromeos/settings/device_settings_cache.cc
+++ b/chrome/browser/chromeos/settings/device_settings_cache.cc
@@ -19,10 +19,8 @@ namespace chromeos {
 
 namespace device_settings_cache {
 
-void RegisterPrefs(PrefService* local_state) {
-  local_state->RegisterStringPref(prefs::kDeviceSettingsCache,
-                                  "invalid",
-                                  PrefService::UNSYNCABLE_PREF);
+void RegisterPrefs(PrefServiceSimple* local_state) {
+  local_state->RegisterStringPref(prefs::kDeviceSettingsCache, "invalid");
 }
 
 bool Store(const em::PolicyData& policy, PrefService* local_state) {