Guest mode causes certain settings to be hidden.

chrome/browser/resources/options/browser_options.js

Index: chrome/browser/resources/options/browser_options.js
diff --git a/chrome/browser/resources/options/browser_options.js b/chrome/browser/resources/options/browser_options.js
index 8c7334ac5d299a9939165719a044dca997976128..d705256fa1296281e7caa7047893b86c007574d1 100644
--- a/chrome/browser/resources/options/browser_options.js
+++ b/chrome/browser/resources/options/browser_options.js
@@ -220,6 +220,18 @@ cr.define('options', function() {
         };
       }
 
+      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',
@@ -651,8 +663,10 @@ cr.define('options', function() {
       $('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',