Roll src/third_party/catapult/ 3950931a9..c82129405 (1 commit).

https://chromium.googlesource.com/external/github.com/catapult-project/catapult.git/+log/3950931a913d..c82129405204

$ git log 3950931a9..c82129405 --date=short --no-merges --format='%ad %ae %s'
2016-11-29 nednguyen [Telemetry] Add AddTimelineBasedMetric API for TBM option

BUG=669526

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/2535263002
Cr-Commit-Position: refs/heads/master@{#435029}

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': '3950931a913d02de369509948089da7ccd4acce4',
+  'catapult_revision': 'c8212940520447510a4651e58ac7c877dfdcd7db',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libFuzzer
   # and whatever else without interference from each other.