It would be bizarre if Google provided old versions of Chrome. Chrome tries hard to make you not even notice what version you're running, running a version that is not the latest is against Chrome's ethos. They would have to be special builds too because the first thing it would do is upgrade you to the latest (if your system is supported of course). That would be amusing, but useless.
> Google's stance is that they only support the latest version. Needless to say, this policy hasn't been popular with web developers who need to test older versions.
It's actually extremely popular with web developers because almost everyone is on the current version. It's awesome.