Roll src/third_party/catapult/ 4dd2f587f..20c5e0b31 (1 commit).

https://chromium.googlesource.com/external/github.com/catapult-project/catapult.git/+log/4dd2f587ffc3..20c5e0b31c76

$ git log 4dd2f587f..20c5e0b31 --date=short --no-merges --format='%ad %ae %s'
2017-02-03 simonhatch Previously alert.py has some pre-hook logic to update associated groups. This involved several sync gets + query, with some potential puts and deletes. The newer implementation strips the pre-hook out in favour of heavily batching async calls when alerts are updated.

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

If the roll is causing failures, see:
http://www.chromium.org/developers/tree-sheriffs/sheriff-details-chromium#TOC-Failures-due-to-DEPS-rolls

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel
TBR=catapult-sheriff@chromium.org

Review-Url: https://codereview.chromium.org/2671023002
Cr-Commit-Position: refs/heads/master@{#448050}

DEPS

@@ -96,7 +96,7 @@ 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': '4dd2f587ffc33c062c8b0308567fdfbb27d6dc6c',
+  'catapult_revision': '20c5e0b31c76cfbcf8ee0f629fe4c3069367f3c4',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libFuzzer
   # and whatever else without interference from each other.