Hide "Add user" button when enrollment screen is active.

ui/login/display_manager.js

 // Copyright 2014 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.
 
 /**
  * @fileoverview Display manager for WebUI OOBE and login.
  */
 
 // TODO(xiyuan): Find a better to share those constants.
 /** @const */ var SCREEN_OOBE_NETWORK = 'connect';
@@ skipping 45 matching lines @@
 /* Signin UI state constants. Used to control header bar UI. */
 /** @const */ var SIGNIN_UI_STATE = {
   HIDDEN: 0,
   GAIA_SIGNIN: 1,
   ACCOUNT_PICKER: 2,
   WRONG_HWID_WARNING: 3,
   SUPERVISED_USER_CREATION_FLOW: 4,
   SAML_PASSWORD_CONFIRM: 5,
   CONSUMER_MANAGEMENT_ENROLLMENT: 6,
   PASSWORD_CHANGED: 7,
+  ENROLLMENT: 8
 };
 
 /* Possible UI states of the error screen. */
 /** @const */ var ERROR_SCREEN_UI_STATE = {
   UNKNOWN: 'ui-state-unknown',
   UPDATE: 'ui-state-update',
   SIGNIN: 'ui-state-signin',
   SUPERVISED_USER_CREATION_FLOW: 'ui-state-supervised',
   KIOSK_MODE: 'ui-state-kiosk-mode',
   LOCAL_STATE_ERROR: 'ui-state-local-state-error',
@@ skipping 1011 matching lines @@
    */
   DisplayManager.refocusCurrentPod = function() {
     $('pod-row').refocusCurrentPod();
   };
 
   // Export
   return {
     DisplayManager: DisplayManager
   };
 });