Guest mode causes certain settings to be hidden.

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 Page = cr.ui.pageManager.Page;
   var PageManager = cr.ui.pageManager.PageManager;
   var ArrayDataModel = cr.ui.ArrayDataModel;
   var RepeatingButton = cr.ui.RepeatingButton;
@@ skipping 202 matching lines @@
       chrome.send('requestHotwordAvailable');
 
       if ($('set-wallpaper')) {
         $('set-wallpaper').onclick = function(event) {
           chrome.send('openWallpaperManager');
           chrome.send('coreOptionsUserMetricsAction',
                       ['Options_OpenWallpaperManager']);
         };
       }
 
+      if (loadTimeData.getBoolean('profileIsGuest')) {
+        if ($('appearance-section')) {
+          $('appearance-section').hidden = true;
+        }
+        if ($('startup-section')) {
+          $('startup-section').hidden = true;
+        }
+        if ($('searchBox')) {
+          $('searchBox').hidden = true;
+        }
+      }
+
       $('themes-gallery').onclick = function(event) {
         window.open(loadTimeData.getString('themesGalleryURL'));
         chrome.send('coreOptionsUserMetricsAction',
                     ['Options_ThemesGallery']);
       };
       $('themes-reset').onclick = function(event) {
         chrome.send('themesReset');
       };
 
       if (loadTimeData.getBoolean('profileIsSupervised')) {
@@ skipping 411 matching lines @@
         $('gpu-mode-reset-restart-button').onclick = function(event) {
           chrome.send('restartBrowser');
         };
         updateGpuRestartButton();
       }
 
       // Reset profile settings section.
       $('reset-profile-settings').onclick = function(event) {
         PageManager.showPageByName('resetProfileSettings');
       };
+      // The Reset Profile Settings feature makes no sense for an off-the-record
+      // profile (e.g. in Guest mode on Chrome OS), so hide it.
       $('reset-profile-settings-section').hidden =
-          !loadTimeData.getBoolean('enableResetProfileSettings');
+          loadTimeData.getBoolean('profileIsGuest');
 
       // Extension controlled UI.
       this.addExtensionControlledBox_('search-section-content',
                                       'search-engine-controlled',
                                       true);
       this.addExtensionControlledBox_('extension-controlled-container',
                                       'homepage-controlled',
                                       true);
       this.addExtensionControlledBox_('startup-section-content',
                                       'startpage-controlled',
@@ skipping 1314 matching lines @@
     BrowserOptions.getLoggedInUsername = function() {
       return BrowserOptions.getInstance().username_;
     };
   }
 
   // Export
   return {
     BrowserOptions: BrowserOptions
   };
 });