MD Settings: CrOS: Focus elements on dialog close

chrome/browser/resources/settings/bluetooth_page/bluetooth_subpage.js

 // Copyright 2017 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-bluetooth-subpage' is the settings subpage for managing bluetooth
  *  properties and devices.
  */
 
@@ skipping 444 matching lines @@
       this.dialogId_ = dialogId;
       return;
     }
     this.dialogId_ = dialogId;
     // Call flush so that the dialog gets sized correctly before it is opened.
     Polymer.dom.flush();
     this.$.deviceDialog.open();
   },
 
   /** @private */
-  onDialogClosed_: function() {
+  onDialogClose_: function() {
     this.dialogId_ = '';
     this.pairingDevice_ = undefined;
+    // The list is dynamic so focus the first item.
+    var device = this.$$('#unpairedContainer bluetooth-device-list-item');
+    if (device)
+      device.focus();
   },
 });