MD User Manager: Error message if pref doesn't allow creating supervised user.

chrome/browser/ui/webui/signin/signin_supervised_user_import_handler.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/webui/signin/signin_supervised_user_import_handler.h"
 
 #include <stddef.h>
 
 #include <set>
 #include <vector>
@@ skipping 150 matching lines @@
           weak_ptr_factory_.GetWeakPtr()),
       base::string16(), std::string(), std::string());
 }
 
 void SigninSupervisedUserImportHandler::LoadCustodianProfileCallback(
     Profile* profile, Profile::CreateStatus status) {
 
   // This method gets called once before with Profile::CREATE_STATUS_CREATED.
   switch (status) {
     case Profile::CREATE_STATUS_LOCAL_FAIL: {
-      // TODO(mahmadi): see if a better error message is required here.
       RejectCallback(GetLocalErrorMessage());
       break;
     }
     case Profile::CREATE_STATUS_CREATED: {
       // Ignore the intermediate status.
       break;
     }
     case Profile::CREATE_STATUS_INITIALIZED: {
       // We are only interested in Profile::CREATE_STATUS_INITIALIZED when
       // everything is ready.
@@ skipping 121 matching lines @@
 
 bool SigninSupervisedUserImportHandler::HasAuthError(Profile* profile) const {
   SigninErrorController* error_controller =
       SigninErrorControllerFactory::GetForProfile(profile);
   if (!error_controller)
     return true;
 
   GoogleServiceAuthError::State state = error_controller->auth_error().state();
   return state != GoogleServiceAuthError::NONE;
 }