Build a Chrome Web App in a similar vain to the PhoneGap app.

I had to pull out the previously inline boot js from the layout into it's own file as Chrome Web Apps aren't allowed inline js.

Grunt builds a zip file with index.html, manifest.json and the contents of public/. It then runs it's through grunt-simple-crx with the private key and we get chromeapp.crx out. Drag this into chrome://extensions in your browser to install it.