MD Settings: People: Fix issues with user icons

chrome/browser/resources/settings/people_page/user_list.js

 // Copyright 2015 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
  * 'settings-user-list' shows a list of users whitelisted on this Chrome OS
  * device.
  *
  * Example:
@@ skipping 82 matching lines @@
   removeUser_: function(e) {
     chrome.usersPrivate.removeWhitelistedUser(
         e.model.item.email, /* callback */ function() {});
   },
 
   /** @private */
   shouldHideCloseButton_: function(disabled, isUserOwner) {
     return disabled || isUserOwner;
   },
 
-  /** @private */
-  getProfilePictureUrl_: function(username) {
-    return 'chrome://userimage/' + username + '?id=' + Date.now();
+  /**
+   * @param {chrome.usersPrivate.User} user
+   * @private
+   */
+  getProfilePictureUrl_: function(user) {
+    return 'chrome://userimage/' + user.email + '?id=' + Date.now();
   }
 });