Remove PrefServiceSimple, replacing it with PrefService and PrefRegistrySimple.

chrome/browser/web_resource/promo_resource_service.cc

Index: chrome/browser/web_resource/promo_resource_service.cc
diff --git a/chrome/browser/web_resource/promo_resource_service.cc b/chrome/browser/web_resource/promo_resource_service.cc
index ad4c185dae5b128acc71c6dec211bfb9c37d61c9..a5ac30741bd0c0a74be1689d0efe24b15fb00799 100644
--- a/chrome/browser/web_resource/promo_resource_service.cc
+++ b/chrome/browser/web_resource/promo_resource_service.cc
@@ -10,6 +10,7 @@
 #include "base/threading/thread_restrictions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
+#include "chrome/browser/prefs/pref_registrar_simple.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/web_resource/notification_promo.h"
@@ -62,13 +63,14 @@ int GetCacheUpdateDelay() {
 }  // namespace
 
 // static
-void PromoResourceService::RegisterPrefs(PrefServiceSimple* local_state) {
+void PromoResourceService::RegisterPrefs(PrefService* local_state,
+                                         PrefRegistrarSimple* registrar) {
   // TODO(achuith): Delete this in M26. http://crbug.com/143773
   // The promo service version number, and last locale.
   const char kNtpPromoVersion[] = "ntp.promo_version";
   const char kNtpPromoLocale[] = "ntp.promo_locale";
-  local_state->RegisterIntegerPref(kNtpPromoVersion, 0);
-  local_state->RegisterStringPref(kNtpPromoLocale, std::string());
+  registrar->RegisterIntegerPref(kNtpPromoVersion, 0);
+  registrar->RegisterStringPref(kNtpPromoLocale, std::string());
   local_state->ClearPref(kNtpPromoVersion);
   local_state->ClearPref(kNtpPromoLocale);
 }