Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/policy/policy_statistics_collector.cc

Index: chrome/browser/policy/policy_statistics_collector.cc
diff --git a/chrome/browser/policy/policy_statistics_collector.cc b/chrome/browser/policy/policy_statistics_collector.cc
index 3d01564d5cff2a3fbe53268bc9d14a9a770dfa8e..99fea753aa35d947da9de225d30e52e46e919d50 100644
--- a/chrome/browser/policy/policy_statistics_collector.cc
+++ b/chrome/browser/policy/policy_statistics_collector.cc
@@ -49,9 +49,9 @@ void PolicyStatisticsCollector::Initialize() {
 }
 
 // static
-void PolicyStatisticsCollector::RegisterPrefs(PrefService* prefs) {
+void PolicyStatisticsCollector::RegisterPrefs(PrefServiceSyncable* prefs) {
   prefs->RegisterInt64Pref(prefs::kLastPolicyStatisticsUpdate, 0,
-                           PrefService::UNSYNCABLE_PREF);
+                           PrefServiceSyncable::UNSYNCABLE_PREF);
 }
 
 void PolicyStatisticsCollector::RecordPolicyUse(int id) {