Remove PrefServiceSimple, replacing it with PrefService and PrefRegistrySimple.

chrome/browser/policy/cloud_policy_subsystem.h

Index: chrome/browser/policy/cloud_policy_subsystem.h
diff --git a/chrome/browser/policy/cloud_policy_subsystem.h b/chrome/browser/policy/cloud_policy_subsystem.h
index 93fcec725c84eba777d3e571a0dab11a78691422..7f3d27ae45c901689358ff46792de1cbb7f7ec55 100644
--- a/chrome/browser/policy/cloud_policy_subsystem.h
+++ b/chrome/browser/policy/cloud_policy_subsystem.h
@@ -9,7 +9,7 @@
 #include "base/prefs/public/pref_change_registrar.h"
 #include "net/base/network_change_notifier.h"
 
-class PrefServiceSimple;
+class PrefRegistrarSimple;
 
 namespace policy {
 
@@ -100,7 +100,7 @@ class CloudPolicySubsystem
   void RefreshPolicies(bool wait_for_auth_token);
 
   // Registers cloud policy related prefs.
-  static void RegisterPrefs(PrefServiceSimple* pref_service);
+  static void RegisterPrefs(PrefRegistrarSimple* pref_service);
 
   // Schedule initialization of the policy backend service.
   void ScheduleServiceInitialization(int64 delay_milliseconds);