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

chrome/browser/resources/settings/privacy_page/privacy_page.js

 // Copyright 2015 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-privacy-page' is the settings page containing privacy and
  * security settings.
  */
 Polymer({
@@ skipping 20 matching lines @@
     showClearBrowsingDataDialog_: {
       computed: 'computeShowClearBrowsingDataDialog_(currentRoute)',
       type: Boolean,
     },
   },
 
   ready: function() {
     this.ContentSettingsTypes = settings.ContentSettingsTypes;
   },
 
-  /** @suppress {missingProperties} */
-  attached: function() {
-    settings.main.rendered.then(function() {
-      if (this.showClearBrowsingDataDialog_) {
-        var dialog = this.$$('settings-clear-browsing-data-dialog').$.dialog;
-        // TODO(dbeam): cast to a CrDialogElement when it compiles.
-        dialog.refit();
-      }
-    }.bind(this));
-  },
-
   /**
    * @return {boolean} Whether the Clear Browsing Data dialog should be showing.
    * @private
    */
   computeShowClearBrowsingDataDialog_: function() {
     var route = this.currentRoute;
     return route && route.dialog == 'clear-browsing-data';
   },
 
   /** @private */
@@ skipping 21 matching lines @@
       section: 'privacy',
       subpage: [],
       dialog: 'clear-browsing-data',
     };
   },
 
   /**
    * @param {!Event} event
    * @private
    */
-  onIronOverlayClosed_: function(event) {
-    if (Polymer.dom(event).rootTarget.tagName != 'CR-DIALOG')
-      return;
-
+  onDialogClosed_: function(event) {
     this.currentRoute = {
       page: 'advanced',
       section: 'privacy',
       subpage: [],
       // Drop dialog key.
     };
   },
 });