Replace own callback handling with Promises.

chrome/browser/resources/options/managed_user_list.js

 // Copyright 2013 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.
 
 cr.define('options.managedUserOptions', function() {
   /** @const */ var List = cr.ui.List;
   /** @const */ var ListItem = cr.ui.ListItem;
   /** @const */ var ListSingleSelectionModel = cr.ui.ListSingleSelectionModel;
 
   /**
@@ skipping 54 matching lines @@
       iconElement.style.content =
           imageset(managedUser.iconURL + '@scalefactorx');
       this.appendChild(iconElement);
 
       // Add the profile name.
       var nameElement = this.ownerDocument.createElement('div');
       nameElement.className = 'profile-name';
       nameElement.textContent = managedUser.name;
       this.appendChild(nameElement);
 
-      if (managedUser.onCurrentDevice) {
+      if (managedUser.onCurrentDevice || managedUser.nameConflict) {
         iconElement.className += ' profile-img-disabled';
         nameElement.className += ' profile-name-disabled';
 
         // Add "(already on this device)" message.
         var alreadyOnDeviceElement = this.ownerDocument.createElement('div');
         alreadyOnDeviceElement.className =
             'profile-name-disabled already-on-this-device';
-        alreadyOnDeviceElement.textContent =
-            loadTimeData.getString('managedUserAlreadyOnThisDevice');
+        alreadyOnDeviceElement.textContent = loadTimeData.getString(
+            managedUser.onCurrentDevice ? 'managedUserAlreadyOnThisDevice' :
+                                          'managedUserNameConflict');
         this.appendChild(alreadyOnDeviceElement);
       }
     },
   };
 
   /**
    * Create a new managed users list.
    * @constructor
    * @extends {cr.ui.List}
    */
@@ skipping 13 matching lines @@
       this.selectionModel = new ListSingleSelectionModel();
       this.autoExpands = true;
     },
   };
 
   return {
     ManagedUserListItem: ManagedUserListItem,
     ManagedUserList: ManagedUserList,
   };
 });