Add support for a managed user pref store to PrefService.

base/prefs/pref_service_builder.h

Index: base/prefs/pref_service_builder.h
diff --git a/base/prefs/pref_service_builder.h b/base/prefs/pref_service_builder.h
index 4bd4fde7dd6328f0e7c57eec58a481be3922cddf..cf6a9590c3cb0243f70b0d5cbd03c55b9f87d688 100644
--- a/base/prefs/pref_service_builder.h
+++ b/base/prefs/pref_service_builder.h
@@ -29,6 +29,7 @@ class BASE_PREFS_EXPORT PrefServiceBuilder {
   // Functions for setting the various parameters of the PrefService to build.
   // These take ownership of the |store| parameter.
   PrefServiceBuilder& WithManagedPrefs(PrefStore* store);
+  PrefServiceBuilder& WithManagedUserPrefs(PrefStore* store);
   PrefServiceBuilder& WithExtensionPrefs(PrefStore* store);
   PrefServiceBuilder& WithCommandLinePrefs(PrefStore* store);
   PrefServiceBuilder& WithUserPrefs(PersistentPrefStore* store);
@@ -55,6 +56,7 @@ class BASE_PREFS_EXPORT PrefServiceBuilder {
   virtual void ResetDefaultState();
 
   scoped_refptr<PrefStore> managed_prefs_;
+  scoped_refptr<PrefStore> managed_user_prefs_;
   scoped_refptr<PrefStore> extension_prefs_;
   scoped_refptr<PrefStore> command_line_prefs_;
   scoped_refptr<PersistentPrefStore> user_prefs_;