Roll src/third_party/chromite 1834bbb39c1c..29a49c28458d (3 commits)

https://chromium.googlesource.com/chromiumos/chromite.git/+log/1834bbb39c1c..29a49c28458d

git log 1834bbb39c1c..29a49c28458d --date=short --no-merges --format='%ad %ae %s'
2019-10-22 wbbradley@chromium.org build api metrics: make sure we deserialize metrics in image Create
2019-10-22 vapier@chromium.org loman: make subparser work under python 3
2019-10-22 vapier@chromium.org pushimage: fix up for python 3

Created with:
  gclient setdep -r src/third_party/chromite@29a49c28458d

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: Id4945758727d1bc06da3c77a3f3f2a17607f3e1a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1874620Reviewed-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@{#708476}

DEPS

@@ -866,7 +866,7 @@ deps = {
 
   # Build tools for Chrome OS. Note: This depends on third_party/pyelftools.
   'src/third_party/chromite': {
-      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + '1834bbb39c1c5c398e4c4b9b65e3a7bdc764c8de',
+      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + '29a49c28458d867e741f64d7ec86e1aca600418c',
       'condition': 'checkout_linux',
   },