Maybe the solution is to have the automatic downloads of chrome be anonymous and build the system in such a way that changing it would not be possible.<p>Basically, change the chrome automatic updater to not send any identifying information when it requests a update. That way, you can be sure that Google couldn't just target 'you' with a update.<p>Then, you just need to rely on the fact that people would be watching the chromium code for any changes which would negate the above anonymity.<p>The real challenge would be for Google to develop a way where they could not still identify people from their other data (IP, cookies, etc..) when they were requesting a update.<p>Maybe have a third party host/store chrome update binaries? Something like amazon S3 or something which would not data share with Google.