Roll src/third_party/catapult 018d99e46edf..4a3fef3b6875 (1 commits)

https://chromium.googlesource.com/catapult.git/+log/018d99e46edf..4a3fef3b6875

git log 018d99e46edf..4a3fef3b6875 --date=short --first-parent --format='%ad %ae %s'
2020-02-20 rmhasan@google.com [Typ] Set default string arguments to None in Expectation constructor

Created with:
  gclient setdep -r src/third_party/catapult@4a3fef3b6875

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 crouleau@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:chromeos-kevin-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:986447
Tbr: crouleau@google.com
Change-Id: I24f5ab59da9864541141b7208e7e52efd5b7b129
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2067581Reviewed-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@{#743370}

DEPS

@@ -234,7 +234,7 @@ 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': '018d99e46edfd5c4ea5926cc8408db5af0774410',
+  'catapult_revision': '4a3fef3b687528a01dd1f415aceaee8527114b59',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libFuzzer
   # and whatever else without interference from each other.