Comment 4 for bug 743494

This is a theoretical fix to the deadlock issue which should make it onto the M12 branch (http://codereview.chromium.org/6878038/). It is not entirely tested (and there's currently a weird crash regression in the sync code on trunk right now). I'd like to hammer on it a little bit more before I'd feel comfortable suggestion that it be backported to M11 (where it won't be), but it is being worked on upstream.