Roll src/third_party/chromite 4283206673b9..81607380ef4e (3 commits)

https://chromium.googlesource.com/chromiumos/chromite.git/+log/4283206673b9..81607380ef4e

git log 4283206673b9..81607380ef4e --date=short --no-merges --format='%ad %ae %s'
2019-10-16 vapier@chromium.org cros_test_lib: make popen mock less annoying
2019-10-16 vapier@chromium.org cros_test_lib: fix VerifyTarball under python 3
2019-10-16 mmortensen@google.com Have determine_chrome_version use a build_target to match controller call.

Created with:
  gclient setdep -r src/third_party/chromite@81607380ef4e

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/+/master/autoroll/README.md

CQ_INCLUDE_TRYBOTS=luci.chromium.try:chromeos-kevin-rel
TBR=chrome-os-gardeners@google.com

Bug: None
Change-Id: Ia56851f4bbe13cd198808b8187ebc36ce6d4961e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1865704Reviewed-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@{#706712}

DEPS

@@ -862,7 +862,7 @@ deps = {
 
   # Build tools for Chrome OS. Note: This depends on third_party/pyelftools.
   'src/third_party/chromite': {
-      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + '4283206673b92d011fb642a97615e21cbf8b56bf',
+      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + '81607380ef4e145c2f25df2e4e7ee1239785a7a8',
       'condition': 'checkout_linux',
   },