Add Sync data type for managed users.

chrome/browser/sync/glue/model_association_manager.cc

Index: chrome/browser/sync/glue/model_association_manager.cc
diff --git a/chrome/browser/sync/glue/model_association_manager.cc b/chrome/browser/sync/glue/model_association_manager.cc
index e47c6c0f53dce6a144aa0f792276077e80b63bad..0e435e8d2d4edcf7329b461e38f23071b6516b3d 100644
--- a/chrome/browser/sync/glue/model_association_manager.cc
+++ b/chrome/browser/sync/glue/model_association_manager.cc
@@ -30,6 +30,9 @@ static const syncer::ModelType kStartOrder[] = {
   syncer::EXPERIMENTS,          //  Listed for completeness.
   syncer::PROXY_TABS,           //  Listed for completeness.
   syncer::BOOKMARKS,            //  UI thread datatypes.
+  syncer::MANAGED_USERS,        //  Syncing managed users on initial login might
+                                //  block creating a new managed user, so we
+                                //  want to do it early.
   syncer::PREFERENCES,
   syncer::PRIORITY_PREFERENCES,
   syncer::EXTENSIONS,