Implement newly designed sign-in related histograms for desktop platorms.

chrome/browser/resources/options/manage_profile_overlay.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 Page = cr.ui.pageManager.Page;
   var PageManager = cr.ui.pageManager.PageManager;
   var ArrayDataModel = cr.ui.ArrayDataModel;
 
   /**
@@ skipping 77 matching lines @@
       };
 
       $('create-profile-supervised-signed-in-learn-more-link').onclick =
           function(event) {
         PageManager.showPageByName('supervisedUserLearnMore');
         return false;
       };
 
       $('create-profile-supervised-sign-in-link').onclick =
           function(event) {
-        SyncSetupOverlay.startSignIn();
+        SyncSetupOverlay.startSignIn('access-point-supervised-user');
       };
 
       $('create-profile-supervised-sign-in-again-link').onclick =
           function(event) {
         SyncSetupOverlay.showSetupUI();
       };
 
       $('import-existing-supervised-user-link').onclick = function(event) {
         // Hide the import button to trigger a cursor update. The import button
         // is shown again when the import overlay loads. TODO(akuegel): Remove
@@ skipping 752 matching lines @@
     'updateSignedInStatus',
     'updateSupervisedUsersAllowed',
   ]);
 
   // Export
   return {
     ManageProfileOverlay: ManageProfileOverlay,
     CreateProfileOverlay: CreateProfileOverlay,
   };
 });