Almost one year old but there was a talk on headless chrome at the Blink conference (BlinkOn 6):

Video: https://youtu.be/GivjumRiZ8c

Slides: https://docs.google.com/presentation/d/1gqK9F4lGAY3TZudAtdcx...

More links: Headless Chrome architecture: https://docs.google.com/document/d/11zIkKkLBocofGgoTeeyibB2T...

Mailing list: https://groups.google.com/a/chromium.org/forum/#!forum/headl...

All of those links are on https://chromium.googlesource.com/chromium/src.git/+/master/...