Revert "Roll Chromite from 168986591cc1 to dcb0e91ca94b (4 revisions)"

This reverts commit f5793ebb.

Reason for revert: Random (but high frequency) failure of untar tast-cmd-0.0.1-r771.tbz2.
Example build: https://ci.chromium.org/p/chromium/builders/ci/chromeos-arm-generic-dbg/19679

Original change's description:
> Roll Chromite from 168986591cc1 to dcb0e91ca94b (4 revisions)
> 
> https://chromium.googlesource.com/chromiumos/chromite.git/+log/168986591cc1..dcb0e91ca94b
> 
> 2020-09-02 gredelston@google.com test_that: Rename whitelist-chrome-crashes
> 2020-09-02 chrome-bot@chromium.org Update config settings by config-updater.
> 2020-09-02 bpastene@chromium.org cache: Use 'pixz' when extracting .xz tarballs if it's installed.
> 2020-09-02 yichengli@chromium.org artifacts: Exclude private fingerprint libraries
> 
> 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: Ib815a99e16e81b13f2680639a71b7d223cb94498
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2390894
> Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
> Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
> Commit-Queue: Ben Pastene <bpastene@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#804026}

TBR=bpastene@chromium.org,newcomer@chromium.org,chromium-autoroll@skia-public.iam.gserviceaccount.com

Change-Id: I92ec34d95ac27ae60f262cf20abb58c3052f2f6d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Cq-Include-Trybots: luci.chrome.try:chromeos-betty-pi-arc-chrome;luci.chromium.try:chromeos-kevin-rel
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2390606Reviewed-by: Makoto Shimazu <shimazu@chromium.org>
Commit-Queue: Makoto Shimazu <shimazu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804075}

DEPS

@@ -876,7 +876,7 @@ 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' + '@' + 'dcb0e91ca94b1c500a5b57ac89c0aba8ce26fcc5',
+      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + '168986591cc17b4eea1e6335be3ae38ec38a8d07',
       'condition': 'checkout_chromeos',
   },