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

chrome/browser/resources/settings/people_page/easy_unlock_turn_off_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 A dialog allowing the user to turn off the Easy Unlock feature.
  */
 
 (function() {
 
@@ skipping 40 matching lines @@
         'easy-unlock-enabled-status',
         this.handleEasyUnlockEnabledStatusChanged_.bind(this));
   },
 
   /**
    * Opens the dialog.
    */
   open: function() {
     this.getTurnOffStatus_().then(function(status) {
       this.status_ = status;
-      this.$.dialog.open();
+      this.$.dialog.showModal();
     }.bind(this));
 
     // The turn off flow status listener should only be active when the dialog
     // is actually open.
     assert(this.turnOffStatusWebUiListener_ == null);
     this.turnOffStatusWebUiListener_ = cr.addWebUIListener(
         'easy-unlock-turn-off-flow-status',
         function(status) { this.status_ = status; }.bind(this));
   },
 
   /**
    * @return {!Promise<!EasyUnlockTurnOffStatus>}
    * @private
    */
   getTurnOffStatus_: function() {
     return navigator.onLine ?
         this.browserProxy_.getTurnOffFlowStatus() :
         Promise.resolve(EasyUnlockTurnOffStatus.OFFLINE);
   },
 
   /**
    * This dialog listens for Easy Unlock to become disabled. This signals
    * that the turnoff process has succeeded. Regardless of whether the turnoff
    * was initiated from this tab or another, this closes the dialog.
    * @param {boolean} easyUnlockEnabled
    * @private
    */
   handleEasyUnlockEnabledStatusChanged_: function(easyUnlockEnabled) {
-    var dialog = /** @type {{opened: boolean}} */ this.$.dialog;
-    if (!easyUnlockEnabled && dialog.opened)
+    var dialog = /** @type {!CrDialogElement} */ this.$.dialog;
+    if (!easyUnlockEnabled && dialog.open)
       this.onCancelTap_();
   },
 
   /** @private */
   onCancelTap_: function() {
     if (this.turnOffStatusWebUiListener_) {
       cr.removeWebUIListener(this.turnOffStatusWebUiListener_);
       this.turnOffStatusWebUiListener_ = null;
     }
 
@@ skipping 95 matching lines @@
    * @return {boolean}
    * @private
    */
   isTurnOffButtonEnabled_: function(status) {
     return status == EasyUnlockTurnOffStatus.IDLE ||
         status == EasyUnlockTurnOffStatus.SERVER_ERROR;
   },
 });
 
 })();