WebUI: Enable ESLint rule for missing semicolons.

chrome/browser/resources/sync_file_system_internals/dump_database.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 DumpDatabase tab for syncfs-internals.
  */
 var DumpDatabase = (function() {
 'use strict';
 
@@ skipping 60 matching lines @@
     var div = document.createElement('div');
     var table = document.createElement('table');
     var header = document.createElement('thead');
     var body = document.createElement('tbody');
     createDatabaseDumpTable(div, header, body, databaseDump[i]);
     table.appendChild(header);
     table.appendChild(body);
     div.appendChild(table);
     placeholder.appendChild(div);
   }
-}
+};
 
 function main() {
   getDatabaseDump();
   $('refresh-database-dump').addEventListener('click', getDatabaseDump);
 }
 
 document.addEventListener('DOMContentLoaded', main);
 return DumpDatabase;
 })();