Code review comment for lp:~mir-team/mir/vsync-timings-from-server

Vsync is more system-wide, certainly not per-connection. On the other hand you do need to avoid waking up all clients 60 times per second so querying per surface is a good compromise.

An even better solution is not having to get info from the server at all. So far there's no visible benefit in doing so, but if this branch gets fixed up and starts performing as well as trunk (or better!) then it could be justified.