Add an ExtensionPrefStore, layered between the user prefs nad the managed pre...

chrome/browser/metrics/metrics_service_uitest.cc

Index: chrome/browser/metrics/metrics_service_uitest.cc
===================================================================
--- chrome/browser/metrics/metrics_service_uitest.cc	(revision 52073)
+++ chrome/browser/metrics/metrics_service_uitest.cc	(working copy)
@@ -54,12 +54,7 @@
     FilePath local_state_path = user_data_dir()
         .Append(chrome::kLocalStateFilename);
 
-    return new PrefService(new PrefValueStore(
-        NULL, /* no managed preferences */
-        new JsonPrefStore( /* local user preferences */
-            local_state_path,
-            ChromeThread::GetMessageLoopProxyForThread(ChromeThread::FILE)),
-        NULL /* no recommended preferences */));
+    return PrefService::CreateUserPrefService(local_state_path);
   }
 };