[Pkg-chromium-maint] Bug#884887: Jochen's fix works for me

[Jeremy Lainé]

I can confirm that the change suggested by Jochen works, so the root 
cause is well understood.

One caveat : in my case the master preferences had trickled down into my 
own preferences in $HOME/.config/chromium/Default/Preferences so that I 
also had to remove the hardware.audio_capture_enabled entry there for 
the change to work.

As a result, users will probably remain affected by this issue even once 
the master preferences have been fixed.

Jeremy