Roll src/third_party/chromite 8708e43c1546..3c311ed15847 (5 commits)

https://chromium.googlesource.com/chromiumos/chromite.git/+log/8708e43c1546..3c311ed15847

git log 8708e43c1546..3c311ed15847 --date=short --no-merges --format='%ad %ae %s'
2019-11-20 vapier@chromium.org luci: fix prpc unittest under python 3
2019-11-20 andrewlamb@chromium.org field_mask_util: Allow paths that aren't found in JSON source.
2019-11-20 andrewlamb@chromium.org replication_lib: Format destination JSON.
2019-11-20 andrewlamb@chromium.org replication_lib: Call CreatedFilteredDict on each device config.
2019-11-20 mmortensen@google.com BuildAPI: Add unit tests and mocks for Dependency Service.

Created with:
  gclient setdep -r src/third_party/chromite@3c311ed15847

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: I3b92c8f48398d5997452260834718503072af544
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1926517
Reviewed-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@{#717307}