Sync confirmation: Enter on paper-checkbox shouldn't confirm dialog

chrome/browser/resources/signin/sync_confirmation/sync_confirmation.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. */
 
 cr.define('sync.confirmation', function() {
   'use strict';
 
   function onConfirm(e) {
     chrome.send('confirm', [$('configure-before-signing-in').checked]);
   }
@@ skipping 34 matching lines @@
     if (loadTimeData.getBoolean('isSyncAllowed')) {
       $('picture-container').classList.add('loaded');
     }
   }
 
   function onKeyDown(e) {
     // If the currently focused element isn't something that performs an action
     // on "enter" being pressed and the user hits "enter", perform the default
     // action of the dialog, which is "OK, Got It".
     if (e.key == 'Enter' &&
-        !/^(A|PAPER-BUTTON)$/.test(document.activeElement.tagName)) {
+        !/^(A|PAPER-(BUTTON|CHECKBOX))$/.test(document.activeElement.tagName)) {
       $('confirmButton').click();
       e.preventDefault();
     }
   }
 
   return {
     clearFocus: clearFocus,
     initialize: initialize,
     setUserImageURL: setUserImageURL
   };
 });
 
 document.addEventListener('DOMContentLoaded', sync.confirmation.initialize);