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

chrome/browser/resources/shared/js/options/language_add_language_overlay.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.
 
 ///////////////////////////////////////////////////////////////////////////////
 // AddLanguageOverlay class:
 
 cr.define('options', function() {
   const OptionsPage = options.OptionsPage;
 
@@ skipping 52 matching lines @@
           addLanguageList.appendChild(option);
         }
       }
     },
   };
 
   return {
     AddLanguageOverlay: AddLanguageOverlay
   };
 });