Roll src/third_party/catapult/ fb4a44ab5..6c4a8ca2e (2 commits)

https://chromium.googlesource.com/catapult.git/+log/fb4a44ab53c4..6c4a8ca2e9bc

$ git log fb4a44ab5..6c4a8ca2e --date=short --no-merges --format='%ad %ae %s'
2018-03-14 dtu [telemetry] Add results label to benchmark_total_duration histogram.
2018-03-14 nednguyen Make psutil import error tolerable for py_utils.memory_debug module

Created with:
  roll-dep src/third_party/catapult


The AutoRoll server is located here: https://catapult-roll.skia.org

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


TBR=sullivan@chromium.org

Change-Id: I54db2524f10f729810fd374d7b95e5ec98021952
Reviewed-on: https://chromium-review.googlesource.com/963479
Commit-Queue: catapult-chromium-autoroll <catapult-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Reviewed-by: catapult-chromium-autoroll <catapult-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#543228}

DEPS

@@ -135,7 +135,7 @@ 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': 'fb4a44ab53c46bb22f7f8194ac62e052aa9b5148',
+  'catapult_revision': '6c4a8ca2e9bc7d1d8fc526efe3c2e8ce087b730c',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libFuzzer
   # and whatever else without interference from each other.