Hide/Disable several (meaningless) options in Settings uber-page for Guest.

chrome/browser/resources/options2/browser_options.js

Index: chrome/browser/resources/options2/browser_options.js
diff --git a/chrome/browser/resources/options2/browser_options.js b/chrome/browser/resources/options2/browser_options.js
index 138a000ee994e5c6f44d4efb40f3f41198300556..7ac9c7f034e4ddf368d8f289cdb4bc4598fd26ce 100644
--- a/chrome/browser/resources/options2/browser_options.js
+++ b/chrome/browser/resources/options2/browser_options.js
@@ -99,6 +99,17 @@ cr.define('options', function() {
       $('themes-reset').onclick = function(event) {
         chrome.send('themesReset');
       };
+      if (cr.isChromeOS) {
+        // Appearance section.
+        if (AccountsOptions.loggedInAsGuest()) {
+          AccountsOptions.disableElementsForGuest(
+              $('home-page-select-container'));
+          AccountsOptions.disableElementsForGuest(
+              $('bookmarkbar-show-on-all-tabs-group'));
+          // Search section
+          AccountsOptions.disableElementsForGuest($('instant-setting'));
+        }
+      }
 
       // Device section (ChromeOS only).
       if (cr.isChromeOS) {
@@ -183,24 +194,25 @@ cr.define('options', function() {
       };
 
       if (cr.isChromeOS) {
-        // Username (canonical email) of the currently logged in user or
-        // |kGuestUser| if a guest session is active.
-        this.username_ = localStrings.getString('username');
-
-        this.updateAccountPicture_();
-
-        if (cr.commandLine && cr.commandLine.options['--bwsi']) {
+        if (AccountsOptions.loggedInAsGuest()) {
           // Disable the screen lock checkbox in guest mode.
-          $('enable-screen-lock').disabled = true;
+          AccountsOptions.disableElementsForGuest($('enable-screen-lock'));
 
-          // Hide the startup section in Guest mode.
+          // Hide the startup and users sections in Guest mode.
           $('startup-section').hidden = true;
+          $('users-section').hidden = true;
         } else {
           $('account-picture-wrapper').onclick = function(event) {
             OptionsPage.navigateToPage('changePicture');
           };
         }
 
+        // Username (canonical email) of the currently logged in user or
+        // |kGuestUser| if a guest session is active.
+        this.username_ = localStrings.getString('username');
+
+        this.updateAccountPicture_();
+
         $('manage-accounts-button').onclick = function(event) {
           OptionsPage.navigateToPage('accounts');
           chrome.send('coreOptionsUserMetricsAction',