Add UMA metrics and histograms for locally managed users.

chrome/browser/resources/options/managed_user_settings.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.
 
 if (loadTimeData.getBoolean('managedUsersEnabled')) {
 
 cr.define('options', function() {
   /** @const */ var OptionsPage = options.OptionsPage;
 
   //////////////////////////////////////////////////////////////////////////////
@@ skipping 33 matching lines @@
       $('managed-user-settings-confirm').onclick = function() {
         OptionsPage.closeOverlay();
       };
 
       $('set-passphrase').onclick = function() {
         // TODO(bauerb): Set passphrase
       };
     },
   };
 
+  /** @override */
+  handleConfirm: function() {
+    SettingsDialog.prototype.handleConfirm.call(this);
+    chrome.send('confirmManagedUserSettings');
+  };
+
+  /** @override */
+  handleCancel: function() {
+    SettingsDialog.prototype.handleCancel.call(this);
+    chrome.send('cancelManagedUserSettings');
+  };
+
    // Export
   return {
     ManagedUserSettings: ManagedUserSettings
   };
 });
 
 }