Chrome Version (from the about:version page):  53.0.2785.92 (Official Build) (64-bit)
Is this the most recent version:  as far as I know
OS + version:  Linux 4.7 on Gentoo
CPU architecture (32-bit / 64-bit): 64
Window manager:  lxde
URLs (if relevant):  cirrusretro.com
Behavior in Linux Firefox:  does not use pulseaudio
Behavior in Windows Chrome (if you have access to it):  Unknown

What steps will reproduce the problem?
(1)  start chrome
(2)  go to cirrusretro.com and play a song
(3)  use a task manager to catch pulseaudio being started

What is the expected result?

I can select ALSA instead of pulseaudio

What happens instead?

it always autodetects pulseaudio even when I hate it with a passion and only use it for programs that are hard-coded to use it.

Please provide any additional information below. Attach a screenshot
and backtrace if possible.

The choice should probably be placed in the advanced section of chrome://settings