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

chrome/browser/resources/settings/site_settings/site_data_details_dialog.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
  * 'site-data-details-dialog' provides a dialog to show details of site data
  * stored by a given site.
  */
 Polymer({
@@ skipping 35 matching lines @@
 
   /**
    * Opens the dialog.
    * @param {!settings.CookieTreeNode} site The site to show data for.
    */
   open: function(site) {
     this.site_ = site;
     this.populateDialog_();
     this.listener_ = cr.addWebUIListener(
         'onTreeItemRemoved', this.onTreeItemRemoved_.bind(this));
-    this.$.dialog.open();
+    this.$.dialog.showModal();
   },
 
   /**
    * Populates the dialog with the data about the site.
    */
   populateDialog_: function() {
     this.title_ = loadTimeData.getStringF('siteSettingsCookieDialog',
                                           this.site_.data_.title);
 
     this.entries_ = this.site_.getCookieList();
@@ skipping 90 matching lines @@
   },
 
   /**
    * A handler for when the user opts to remove all cookies.
    */
   onRemoveAll_: function(event) {
     cr.removeWebUIListener(this.listener_);
     this.browserProxy.removeCookie(this.site_.data_.id);
   },
 });