md-settings: Fix back navigation from /resetProfileSettings.

chrome/browser/resources/settings/reset_page/reset_profile_dialog.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-reset-profile-dialog' is the dialog shown for clearing profile
  * settings.
  */
 Polymer({
@@ skipping 16 matching lines @@
 
   /** @override */
   ready: function() {
     this.browserProxy_ = settings.ResetBrowserProxyImpl.getInstance();
 
     this.addEventListener('cancel', function() {
       this.browserProxy_.onHideResetProfileDialog();
     }.bind(this));
   },
 
-  open: function() {
+  /** @override */
+  attached: function() {
     this.$.dialog.showModal();
     this.browserProxy_.onShowResetProfileDialog();
   },
 
   /** @private */
   onCancelTap_: function() {
     this.$.dialog.cancel();
   },
 
   /** @private */
   onResetTap_: function() {
     this.clearingInProgress_ = true;
     this.browserProxy_.performResetProfileSettings(
         this.$.sendSettings.checked).then(function() {
       this.clearingInProgress_ = false;
       if (this.$.dialog.open)
         this.$.dialog.close();
       this.fire('reset-done');
     }.bind(this));
   },
 
   /**
    * Displays the settings that will be reported in a new tab.
    * @private
    */
   onShowReportedSettingsTap_: function() {
     this.browserProxy_.showReportedSettings();
   },
 });