Don't display multi-profile under Guest user.

chrome/browser/resources/options/browser_options.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.
 
 cr.define('options', function() {
   var OptionsPage = options.OptionsPage;
   var ArrayDataModel = cr.ui.ArrayDataModel;
   var RepeatingButton = cr.ui.RepeatingButton;
 
   //
@@ skipping 172 matching lines @@
       $('default-search-engine').addEventListener('change',
           this.setDefaultSearchEngine_);
       // Without this, the bubble would overlap the uber frame navigation pane
       // and would not get mouse event as explained in crbug.com/311421.
       document.querySelector(
           '#default-search-engine + .controlled-setting-indicator').location =
               cr.ui.ArrowLocation.TOP_START;
 
       // Users section.
       if (loadTimeData.valueExists('profilesInfo')) {
+        $('sync-users-section').hidden = false;
         $('profiles-section').hidden = false;
 
         var profilesList = $('profiles-list');
         options.browser_options.ProfileList.decorate(profilesList);
         profilesList.autoExpands = true;
 
         // The profiles info data in |loadTimeData| might be stale.
         this.setProfilesInfo_(loadTimeData.getValue('profilesInfo'));
         chrome.send('requestProfilesInfo');
 
@@ skipping 657 matching lines @@
       $('enable-auto-login-checkbox').hidden = !syncData.autoLoginVisible;
     },
 
     /**
      * Update the UI depending on whether the current profile manages any
      * supervised users.
      * @param {boolean} value True if the current profile manages any supervised
      *     users.
      */
     updateManagesSupervisedUsers_: function(value) {
-      $('profiles-supervised-dashboard-tip').hidden = !value;
+      if (value) {
+        $('sync-users-section').hidden = false;
+        $('profiles-supervised-dashboard-tip').hidden = false;
+      } else {
+        $('profiles-supervised-dashboard-tip').hidden = true;
+      }
     },
 
     /**
      * Get the start/stop sync button DOM element. Used for testing.
      * @return {DOMElement} The start/stop sync button.
      * @private
      */
     getStartStopSyncButton_: function() {
       return $('start-stop-sync');
     },
@@ skipping 751 matching lines @@
     BrowserOptions.getLoggedInUsername = function() {
       return BrowserOptions.getInstance().username_;
     };
   }
 
   // Export
   return {
     BrowserOptions: BrowserOptions
   };
 });