Apply content-security-policy to the HTML options page. This is a

chrome/browser/resources/shared/js/options/language_list.js

 // Copyright (c) 2011 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('options', function() {
   const ArrayDataModel = cr.ui.ArrayDataModel;
   const DeletableItem = options.DeletableItem;
   const DeletableItemList = options.DeletableItemList;
   const List = cr.ui.List;
   const ListItem = cr.ui.ListItem;
@@ skipping 463 matching lines @@
       }
       return filteredLanguageCodes;
     },
   };
 
   return {
     LanguageList: LanguageList,
     LanguageListItem: LanguageListItem
   };
 });