The LKGM builder [1] which updates the cros revision used by Simple Chrome runs cros_best_revision.py [2] which is the sole consumer of 'critical_for_chrome' defined in chromeos_config.py [3].

The current contents are 'daisy', 'lumpy' and 'parrot'. 

* daisy is an arm board but is fairly old
* lumpy is an amd64 board but is fairly old.
* parrot is an amd64 board that is old and no longer in the PFQ

The devices currently represented in the PFQ are:
chell
cyan
daisy_skate
lumpy
nyan
peach_pit
peppy
reef
tricky
veyron_minnie
veyron_rialto
x86-alex

At minimum I think we should replace parrot and include a cheets board.

I also think it might make sense to include samus since many developers use that as there primary development device, even though we don't cover it on the PFQ.


[1] https://yaqs.googleplex.com/eng/q/5254238507106304
[2] https://cs.corp.google.com/chromeos_public/chromite/scripts/cros_best_revision.py?q=cros_best_revision.py
[3] https://cs.corp.google.com/chromeos_public/chromite/cbuildbot/chromeos_config.py?q=chromeos_config.py&l=3158