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

chrome/browser/resources/settings/certificate_manager_page/certificate_subentry.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 settings-certificate-subentry represents an SSL certificate
  * sub-entry.
  */
 
 cr.define('settings', function() {
@@ skipping 33 matching lines @@
    * @param {!CertificateAction} action
    * @private
    */
   dispatchCertificateActionEvent_: function(action) {
     this.fire(
         settings.CertificateActionEvent,
         /** @type {!CertificateActionEventDetail} */ ({
           action: action,
           subnode: this.model,
           certificateType: this.certificateType,
+          anchor: this.$.dots,
         }));
   },
 
   /**
    * Handles the case where a call to the browser resulted in a rejected
    * promise.
    * @param {*} error Expects {?CertificatesError}.
    * @private
    */
   onRejected_: function(error) {
     if (error === null) {
       // Nothing to do here. Null indicates that the user clicked "cancel" on
       // the native file chooser dialog.
       return;
     }
 
     // Otherwise propagate the error to the parents, such that a dialog
     // displaying the error will be shown.
-    this.fire('certificates-error', error);
+    this.fire('certificates-error', {error: error, anchor: this.$.dots});
   },
 
   /**
    * @param {!Event} event
    * @private
    */
   onViewTap_: function(event) {
     this.closePopupMenu_();
     this.browserProxy_.viewCertificate(this.model.id);
   },
@@ skipping 68 matching lines @@
 
   /** @private */
   closePopupMenu_: function() {
     this.$$('dialog[is=cr-action-menu]').close();
   },
 
   /** @private */
   onDotsTap_: function() {
     var actionMenu = /** @type {!CrActionMenuElement} */(
         this.$.menu.get());
-    actionMenu.showAt(assert(this.$$('paper-icon-button')));
+    actionMenu.showAt(this.$.dots);
   },
 });