Implement ephemeral users

chrome/browser/resources/options2/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 189 matching lines @@
           ManageProfileOverlay.showDeleteDialog(selectedProfile);
       };
 
       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']) {
-          // Disable the screen lock checkbox in guest mode.
-          $('enable-screen-lock').disabled = true;
-
-          // Hide the startup section in Guest mode.
-          $('startup-section').hidden = true;
-        } else {
+        if (localStrings.getString('current_user_is_ephemeral') != 'true') {
+          // Enable picture changing for non-ephemeral users.
           $('account-picture-wrapper').onclick = function(event) {
             OptionsPage.navigateToPage('changePicture');
           };
+        } else {
+          // Hide picture changing option for ephemeral users.

[Nikita (slow), 2012/03/07 10:03:04]

Please remove this code. Already taken care for Guest mode in
https://chromiumcodereview.appspot.com/9464053/

Ephemeral users should be able to change picture and enable screen lock. While
they are inside their user session they are normal users.

[use bartfab instead, 2012/03/07 11:10:08]

Done.

+          $('change-picture-caption').hidden = true;
+
+          if (cr.commandLine && cr.commandLine.options['--bwsi']) {
+            // Disable the screen lock checkbox in guest mode.
+            $('enable-screen-lock').disabled = true;
+
+            // Hide the startup section in guest mode.
+            $('startup-section').hidden = true;
         }
 
         $('manage-accounts-button').onclick = function(event) {
           OptionsPage.navigateToPage('accounts');
           chrome.send('coreOptionsUserMetricsAction',
               ['Options_ManageAccounts']);
         };
       } else {
         $('import-data').onclick = function(event) {
           // Make sure that any previous import success message is hidden, and
@@ skipping 1004 matching lines @@
     BrowserOptions.getLoggedInUsername = function() {
       return BrowserOptions.getInstance().username_;
     };
   }
 
   // Export
   return {
     BrowserOptions: BrowserOptions
   };
 });