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

chrome/browser/resources/shared/js/options/browser_options.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 OptionsPage = options.OptionsPage;
   const ArrayDataModel = cr.ui.ArrayDataModel;
 
   //
   // BrowserOptions class
@@ skipping 466 matching lines @@
   BrowserOptions.updateAutocompleteSuggestions = function(suggestions) {
     BrowserOptions.getInstance().updateAutocompleteSuggestions_(suggestions);
   };
 
   // Export
   return {
     BrowserOptions: BrowserOptions
   };
 
 });