Migrate <cr-dialog> from PaperDialogBehavior to native <dialog>.

chrome/browser/resources/settings/about_page/detailed_build_info.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.
 
 /**
  * @fileoverview 'settings-detailed-build-info' contains detailed build
  * information for ChromeOS.
  */
 
 Polymer({
@@ skipping 46 matching lines @@
 
   /** @private */
   onChangeChannelTap_: function() {
     this.showChannelSwitcherDialog_ = true;
     // Async to wait for dialog to appear in the DOM.
     this.async(function() {
       var dialog = this.$$('settings-channel-switcher-dialog');
       // Register listener to detect when the dialog is closed. Flip the boolean
       // once closed to force a restamp next time it is shown such that the
       // previous dialog's contents are cleared.
-      dialog.addEventListener('iron-overlay-closed', function() {
+      dialog.addEventListener('close', function() {
         this.showChannelSwitcherDialog_ = false;
       }.bind(this));
     }.bind(this));
   },
 });