MD user manager (learn more page, user manager tutorial)

chrome/browser/resources/md_user_manager/user_manager.js

 // Copyright 2016 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.
 
 <include src="../../../../ui/login/screen.js">
 <include src="../../../../ui/login/bubble.js">
 <include src="../../../../ui/login/login_ui_tools.js">
 <include src="../../../../ui/login/display_manager.js">
 <include src="../../../../ui/login/account_picker/screen_account_picker.js">
 <include src="../../../../ui/login/account_picker/user_pod_row.js">
@@ skipping 29 matching lines @@
                                    data: {disableAddUser: false}});
     // Hide control options if the user does not have the right permissions.
     var controlBar = document.querySelector('control-bar');
     controlBar.showGuest = showGuest;
     controlBar.showAddPerson = showAddPerson;
 
     // Disable the context menu, as the Print/Inspect element items don't
     // make sense when displayed as a widget.
     document.addEventListener('contextmenu', function(e) {e.preventDefault();});
 
-    // TODO(mahmadi): start the tutorial if the location hash is #tutorial.
+    var hash = window.location.hash;
+    if (hash && hash == '#tutorial')

[Dan Beam, 2016/02/25 17:22:07]

why is this code better than

  if (window.location.hash == '#tutorial')

?

[Moe, 2016/03/02 18:25:52]

The check is unnecessary. I agree. I reintroduced the old js code that used to
be here. But I know that doesn't mean I shouldn't make sure it makes sense :) 

+      document.querySelector('user-manager-tutorial').startTutorial();
   };
 
   /**
    * Open a new browser for the given profile.
    * @param {string} profilePath The profile's path.
    */
   Oobe.launchUser = function(profilePath) {
     chrome.send('launchUser', [profilePath]);
   };
 
@@ skipping 41 matching lines @@
    * Restores input focus to currently selected pod.
    */
   Oobe.refocusCurrentPod = function() {
     DisplayManager.refocusCurrentPod();
   };
 
   /**
    * Show the user manager tutorial
    */
   Oobe.showUserManagerTutorial = function() {
-    // TODO(mahmadi): start the tutorial.
+    document.querySelector('user-manager-tutorial').startTutorial();
   };
 
   // Export
   return {
     Oobe: Oobe
   };
 });
 
 cr.define('UserManager', function() {
   'use strict';
@@ skipping 17 matching lines @@
 // Allow selection events on components with editable text (password field)
 // bug (http://code.google.com/p/chromium/issues/detail?id=125863)
 disableTextSelectAndDrag(function(e) {
   var src = e.target;
   return src instanceof HTMLTextAreaElement ||
          src instanceof HTMLInputElement &&
          /text|password|search/.test(src.type);
 });
 
 document.addEventListener('DOMContentLoaded', UserManager.initialize);