BookmarkClient can add extra nodes to BookmarkModel.

components/bookmarks/browser/bookmark_expanded_state_tracker_unittest.cc

Index: components/bookmarks/browser/bookmark_expanded_state_tracker_unittest.cc
diff --git a/components/bookmarks/browser/bookmark_expanded_state_tracker_unittest.cc b/components/bookmarks/browser/bookmark_expanded_state_tracker_unittest.cc
index 71cb2d039f34d1ae9ddabc4e5ddc84a06b153a4c..0dcf1cf072211c6a4cf18d84bedbfbd4a55230ff 100644
--- a/components/bookmarks/browser/bookmark_expanded_state_tracker_unittest.cc
+++ b/components/bookmarks/browser/bookmark_expanded_state_tracker_unittest.cc
@@ -24,6 +24,8 @@ scoped_ptr<PrefService> PrefServiceForTesting() {
   registry->RegisterListPref(prefs::kBookmarkEditorExpandedNodes,
                              new base::ListValue,
                              user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterListPref(prefs::kManagedBookmarks,
+                             user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
   base::PrefServiceFactory factory;
   factory.set_user_prefs(make_scoped_refptr(new TestingPrefStore()));
   return factory.Create(registry.get());