I was surprised and angered by the sudden appearance of this automatic sign-in and sync. Between the time that it was activated silently and when I disabled it, I have a nagging suspicion that Google hoovered up my browsing history, bookmarks, passwords, etc. in the guise of "sync". While I couldn't find any evidence, whatever little trust I had left in Chrome is now gone.
> I have a nagging suspicion that Google hoovered up my browsing history, bookmarks, passwords, etc. in the guise of "sync".
It does save some state even when you erase all your history. You can log into GMail, then go to your history and click to erase all history, after which the history settings page will scroll down (to hide the fact you're still logged into this sync thing?), and then when you go to GMail you're logged in again, effectively making Google bypass you clearing your cookies.
