This is actually Node.js code running the http listener on Chrome’s Javascript VM!
While we like the Browserver project, it uses a reverse proxy and pushes requests down to the client via a websocket. Node-chromify took a different approach, and has no external server dependency.
You can get the source to the demo app, and a build of node.js (the script, not the whole node project) here: https://github.com/iceddev/node-chromify