How long before they rip out open source parts and make chrome closed source or a much more limited licensing and start sticking all their proprietary network protocols in it so that you can't fork Chrome any longer. I personally believe that's the endgame for google.
I don't think there a single instance of an application that Google did what you described. Why do you think it will start now? This doesn't make any sense.
Very interesting project. ungoogled-chromium seems to addressing many of the concerns that inhibit control and transparency. E.g Chromium even without a Google account cannot address those concerns.
[1] https://github.com/Eloston/ungoogled-chromium