Roll Chromite from 4fe1d403a22d to 7c9f31beb6db (6 revisions)

https://chromium.googlesource.com/chromiumos/chromite.git/+log/4fe1d403a22d..7c9f31beb6db

2020-10-13 inglorion@chromium.org cros_sdk: inform and raise vm.max_map_count if too low
2020-10-12 saklein@chromium.org Revert "deploy: Refactor SplitCPV to parse."
2020-10-12 saklein@chromium.org api/tutorials: Add part 4, faux decorators.
2020-10-12 jettrink@chromium.org build_api: add handlers for tot fw builder API
2020-10-12 jettrink@chromium.org generate: initial commit of firmware proto file
2020-10-12 manojgupta@chromium.org config_lib.py: Add hwtests for trogdor64

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: If4857d6142f47d4d1db7674cfd5c220aa8701837
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2466929Reviewed-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@{#816635}

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' + '@' + '4fe1d403a22dfa80541234f4553a2d432772d81f',
+      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + '7c9f31beb6db418aa5f7067eca9051691d67efd5',
       'condition': 'checkout_chromeos',
   },