Pref service: expose all read-only PrefStores through Mojo

chrome/browser/prefs/chrome_pref_service_factory.cc

Index: chrome/browser/prefs/chrome_pref_service_factory.cc
diff --git a/chrome/browser/prefs/chrome_pref_service_factory.cc b/chrome/browser/prefs/chrome_pref_service_factory.cc
index 48ceeea700d79b43bddc1f3b37821f0f613a829d..0c4d646ad0bb8ae3ba5f5f65a0090cda3e6d8c06 100644
--- a/chrome/browser/prefs/chrome_pref_service_factory.cc
+++ b/chrome/browser/prefs/chrome_pref_service_factory.cc
@@ -476,7 +476,8 @@ std::unique_ptr<sync_preferences::PrefServiceSyncable> CreateProfilePrefs(
     SupervisedUserSettingsService* supervised_user_settings,
     const scoped_refptr<PrefStore>& extension_prefs,
     const scoped_refptr<user_prefs::PrefRegistrySyncable>& pref_registry,
-    bool async) {
+    bool async,
+    service_manager::Connector* connector) {
   TRACE_EVENT0("browser", "chrome_prefs::CreateProfilePrefs");
   SCOPED_UMA_HISTOGRAM_TIMER("PrefService.CreateProfilePrefsTime");
 
@@ -500,7 +501,7 @@ std::unique_ptr<sync_preferences::PrefServiceSyncable> CreateProfilePrefs(
                  supervised_user_settings, user_pref_store, extension_prefs,
                  async);
   std::unique_ptr<sync_preferences::PrefServiceSyncable> pref_service =
-      factory.CreateSyncable(pref_registry.get());
+      factory.CreateSyncable(pref_registry.get(), connector);
 
   return pref_service;
 }