Bug#889912: Please do not force chrome-gnome-shell / browser integration

[Jeremy Bicha]

Let me propose that we no longer depend on chrome-gnome-shell at all
from either 'gnome' or 'gnome-core'.

That leaves gnome-shell's Recommends on chrome-gnome-shell. We could
demote it to a Suggests, but as long as GNOME supports the
https://extensions.gnome.org/ service, it is a courtesy to our users
to have that service work out of the box.

Enrico, by the way, Simon McVittie points out that you are welcome to
uninstall 'gnome-core' and just install gnome-session directly if you
want a more minimal GNOME install than the one the Debian GNOME team
recommends for most users.

Thanks,
Jeremy Bicha