MD Settings: Restore focus after closing dialogs, for certificate page.

chrome/browser/resources/settings/certificate_manager_page/certificate_delete_confirmation_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 confirmation dialog allowing the user to delete various types
  * of certificates.
  */
 Polymer({
   is: 'settings-certificate-delete-confirmation-dialog',
@@ skipping 71 matching lines @@
 
   /** @private */
   onOkTap_: function() {
     this.browserProxy_.deleteCertificate(this.model.id).then(
         function() {
           /** @type {!CrDialogElement} */ (this.$.dialog).close();
         }.bind(this),
         /** @param {!CertificatesError} error */
         function(error) {
           /** @type {!CrDialogElement} */ (this.$.dialog).close();
-          this.fire('certificates-error', error);
+          this.fire('certificates-error', {error: error, anchor: null});
         }.bind(this));
   },
 });