Roll Chromite from 54d70996a75a to 21b394fcfab2 (8 revisions)

https://chromium.googlesource.com/chromiumos/chromite.git/+log/54d70996a75a..21b394fcfab2

2021-01-21 chrome-bot@chromium.org Update config settings by config-updater.
2021-01-21 chrome-bot@chromium.org Update config settings by config-updater.
2021-01-21 vapier@chromium.org cros_sdk: drop cgroups usage
2021-01-21 chrome-bot@chromium.org Update config settings by config-updater.
2021-01-20 vapier@chromium.org gs: update to latest 4.57 release
2021-01-20 vapier@chromium.org gs: fix unicode handling w/python2
2021-01-20 vapier@chromium.org apiclient: drop old alias
2021-01-20 chrome-bot@chromium.org Update config settings by config-updater.

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/chromite-chromium-autoroll
Please CC chrome-os-gardeners@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md

Cq-Include-Trybots: luci.chrome.try:chromeos-betty-pi-arc-chrome;luci.chromium.try:chromeos-kevin-rel
Tbr: chrome-os-gardeners@google.com
Change-Id: Iac01d2e095adbf2b238d92c1db0274f4bab98c91
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2642820Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#845738}

DEPS

@@ -877,7 +877,7 @@ deps = {
   # Tools used when building Chrome for Chrome OS. This affects both the Simple
   # Chrome workflow, as well as the chromeos-chrome ebuild.
   'src/third_party/chromite': {
-      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + '54d70996a75a29392f034b91e364e474eecacc33',
+      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + '21b394fcfab2b54472bd64c73bd7ae63e72a9a3d',
       'condition': 'checkout_chromeos',
   },