webui: Remove unnecessary </include>s everywhere.

chrome/browser/resources/extensions/extension_list.js

 // Copyright (c) 2012 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.
 
-<include src="extension_error.js"></include>
+<include src="extension_error.js">
 
 cr.define('options', function() {
   'use strict';
 
   /**
    * Creates a new list of extensions.
    * @param {Object=} opt_propertyBag Optional properties.
    * @constructor
    * @extends {cr.ui.div}
    */
@@ skipping 388 matching lines @@
           topScroll -= pad / 2;
         setScrollTopForDocument(document, topScroll);
       }
     },
   };
 
   return {
     ExtensionsList: ExtensionsList
   };
 });