Roll src/third_party/catapult 1e7968db31d4..c4191602bb51 (1 commits)

https://chromium.googlesource.com/catapult.git/+log/1e7968db31d4..c4191602bb51

git log 1e7968db31d4..c4191602bb51 --date=short --no-merges --format='%ad %ae %s'
2019-10-22 khokhlov@google.com [tracing] Add HistogramSet.Merge method

Created with:
  gclient setdep -r src/third_party/catapult@c4191602bb51

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 rmhasan@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
TBR=rmhasan@google.com

Bug: chromium:981349
Change-Id: Ia0d28fade66a729de31ef9045b944e4539994bbd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1873593Reviewed-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@{#708165}

DEPS

@@ -230,7 +230,7 @@ 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': '1e7968db31d45a3112ad6ffbc6c0f5ead91a6a8f',
+  'catapult_revision': 'c4191602bb51e28303d239f332408592865e2e4b',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libFuzzer
   # and whatever else without interference from each other.