since https://github.com/GoogleChrome/chrome-launcher/pull/268 kill() is sync. so the timeout thing we are doing (which only really did anything on windows when we waited for taskkill to finish - otherwise sending a kill signal is instant) is no longer needed.
since https://github.com/GoogleChrome/chrome-launcher/pull/268 kill() is sync. so the timeout thing we are doing (which only really did anything on windows when we waited for taskkill to finish - otherwise sending a kill signal is instant) is no longer needed.