Roll Chromite from b90423b45298 to a4ec7f6e5af7 (6 revisions)

https://chromium.googlesource.com/chromiumos/chromite.git/+log/b90423b45298..a4ec7f6e5af7

2020-08-28 kimiyuki@google.com cros_deploy: Warn when the user seems to forget cros workon
2020-08-28 chrome-bot@chromium.org Update config settings by config-updater.
2020-08-28 chrome-bot@chromium.org Update config settings by config-updater.
2020-08-28 engeg@google.com paygen_payload_lib.py: measure actual payload time
2020-08-27 bhanumaiya@google.com zork: Replace firmware-zork-13421.B builder with firmware-zork-13434.B
2020-08-27 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: I8e545b2ee8a79139ab3bedecf318f0d0830135a9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2381600Reviewed-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@{#802681}

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' + '@' + 'b90423b452985a64c6962d481a9bffb8fd0bdc99',
+      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + 'a4ec7f6e5af7f92ff82e543245977d7d36701c77',
       'condition': 'checkout_chromeos',
   },