Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/chromeos/status/data_promo_notification.cc

Index: chrome/browser/chromeos/status/data_promo_notification.cc
diff --git a/chrome/browser/chromeos/status/data_promo_notification.cc b/chrome/browser/chromeos/status/data_promo_notification.cc
index 6c1fa564cab01aba8127f7cccc03461e02b887af..016e3767eb80baf62a5efde30fbc25a3ce5607ac 100644
--- a/chrome/browser/chromeos/status/data_promo_notification.cc
+++ b/chrome/browser/chromeos/status/data_promo_notification.cc
@@ -127,7 +127,7 @@ DataPromoNotification::~DataPromoNotification() {
   CloseNotification();
 }
 
-void DataPromoNotification::RegisterPrefs(PrefService* local_state) {
+void DataPromoNotification::RegisterPrefs(PrefServiceSimple* local_state) {
   // Carrier deal notification shown count defaults to 0.
   local_state->RegisterIntegerPref(prefs::kCarrierDealPromoShown, 0);
 }