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

chrome/browser/resources/shared/js/options/content_settings_exceptions_area.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.contentSettings', function() {
   const InlineEditableItemList = options.InlineEditableItemList;
   const InlineEditableItem = options.InlineEditableItem;
   const ArrayDataModel = cr.ui.ArrayDataModel;
 
   /**
@@ skipping 530 matching lines @@
     }
   };
 
   return {
     ExceptionsListItem: ExceptionsListItem,
     ExceptionsAddRowListItem: ExceptionsAddRowListItem,
     ExceptionsList: ExceptionsList,
     ContentSettingsExceptionsArea: ContentSettingsExceptionsArea,
   };
 });