Remove `new Function` from parent_utils.js and refactor affected code. Remove parent_utils.js from eval()-whitelist. Differential Revision: https://phabricator.services.mozilla.com/D28062
Remove `new Function` from parent_utils.js and refactor affected code. Remove parent_utils.js from eval()-whitelist. Differential Revision: https://phabricator.services.mozilla.com/D28062