Add butter bar to login screen to show device enrollement info.

chrome/browser/resources/chromeos/login/display_manager.js

 // Copyright (c) 2012 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 SCREEN_GAIA_SIGNIN = 'gaia-signin';
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   /**
    * Sets text content for a div with |labelId|.
    * @param {string} labelId Id of the label div.
    * @param {string} labelText Text for the label.
    */
   DisplayManager.setLabelText = function(labelId, labelText) {
     $(labelId).textContent = labelText;
   };
 
+  /**
+   * Sets the text content of the enterprise info message.
+   * @param {string} messageText The message text.
+   */
+  DisplayManager.setEnterpriseInfo = function(messageText) {
+    $('enterprise-info-message').textContent = messageText;
+    if (messageText)
+      $('enterprise-info-container').hidden = false;
+  };
+
   // Export
   return {
     DisplayManager: DisplayManager
   };
 });