It's already possible to disable Chrome auto-update, and enterprises that wish to already do it. I've worked in an environment that did, years ago. My personal preference remains to allow silent auto-updates for software that auto-updates silently like Adobe Reader or Google Chrome to continue to do so... as long as they have yet to break the environment. (And it saves on management headache for a piece of software we don't really support the use of heavily in our environment.)