WebUI: Enable ESLint rule for missing semicolons.

chrome/browser/resources/sync_file_system_internals/extension_statuses.js

 // Copyright 2013 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.
 
 /**
  * Handles the Extension ID -> SyncStatus tab for syncfs-internals.
  */
 var ExtensionStatuses = (function() {
 'use strict';
 
@@ skipping 30 matching lines @@
   itemContainer.textContent = '';
 
   for (var i = 0; i < extensionStatuses.length; i++) {
     var originEntry = extensionStatuses[i];
     var tr = document.createElement('tr');
     tr.appendChild(createElementFromText('td', originEntry.extensionName));
     tr.appendChild(createElementFromText('td', originEntry.extensionID));
     tr.appendChild(createElementFromText('td', originEntry.status));
     itemContainer.appendChild(tr);
   }
-}
+};
 
 function main() {
   getExtensionStatuses();
   $('refresh-extensions-statuses').addEventListener('click',
                                                     getExtensionStatuses);
 }
 
 document.addEventListener('DOMContentLoaded', main);
 return ExtensionStatuses;
 })();