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

chrome/browser/resources/shared/js/options/advanced_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() {
 
 var OptionsPage = options.OptionsPage;
 
   //
   // AdvancedOptions class
@@ skipping 250 matching lines @@
         proxySectionElm.parentNode.removeChild(proxySectionElm);
     }
   };
 
   // Export
   return {
     AdvancedOptions: AdvancedOptions
   };
 
 });