EDIT: The problem is fixed for me with the latest release of chromium (46.0.2490.86-1) so there is no reason to use this awful hack.
So I had a little problem with the sound in Chromium, for some reason (yet to identify) Chromium starts muted.
You can observe this only when you try to play a video and open
pavucontrol. The solution is to unmute it by opening
pavucontrol and click on the unmute button but it takes too much clicking away for me ;).
Here is a script that does exactly that, note that it can be re-purposed for any program name you wish: