Roll src/third_party/catapult ca84a4265921..42f2c4bd8176 (2 commits)

https://chromium.googlesource.com/catapult.git/+log/ca84a4265921..42f2c4bd8176

git log ca84a4265921..42f2c4bd8176 --date=short --first-parent --format='%ad %ae %s'
2019-12-03 fancl@chromium.org Change the docker script to get the user using gcloud
2019-12-03 abennetts@google.com Add gitignore of *_pb2.py to dashboard/dashboard.

Created with:
  gclient setdep -r src/third_party/catapult@42f2c4bd8176

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/catapult-autoroll
Please CC nuskos@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:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Bug: chromium:1029242
Tbr: nuskos@google.com
Change-Id: I968ed4b928d7ed6b978cf85d628b0ca448cf51de
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1947819Reviewed-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@{#720802}

DEPS

@@ -235,7 +235,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling catapult
   # and whatever else without interference from each other.
-  'catapult_revision': 'ca84a426592112b3ec905eb4080458ea2608a428',
+  'catapult_revision': '42f2c4bd817669fdd18f7f8b91e900184a0c53b5',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libFuzzer
   # and whatever else without interference from each other.