The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/153bea84f73ed4872e1a944f9ca7406d7860a80a

commit 153bea84f73ed4872e1a944f9ca7406d7860a80a
Author: Brandon Wylie <wylieb@chromium.org>
Date: Fri Sep 15 17:07:51 2017

[Findit] Flake Analyzer - Rerun dropped from dtpr pipeline.

dtpr pipeline isn't passing this parameter to its child pipelines or
recursive calls to itself. Making this argument required for this
pipeline and analyzeflakeforbuildnumber pipeline to fix this.

Bug:  763983 
Change-Id: Ie774ec33a7f500af1f17fec63cc6d921e6012146
Reviewed-on: https://chromium-review.googlesource.com/660977
Reviewed-by: Jeffrey Li <lijeffrey@chromium.org>
Reviewed-by: Shuotao Gao <stgao@chromium.org>
Commit-Queue: Brandon Wylie <wylieb@chromium.org>

[modify] https://crrev.com/153bea84f73ed4872e1a944f9ca7406d7860a80a/appengine/findit/waterfall/flake/test/analyze_flake_for_build_number_pipeline_test.py
[modify] https://crrev.com/153bea84f73ed4872e1a944f9ca7406d7860a80a/appengine/findit/waterfall/flake/test/determine_true_pass_rate_pipeline_test.py
[modify] https://crrev.com/153bea84f73ed4872e1a944f9ca7406d7860a80a/appengine/findit/waterfall/flake/determine_true_pass_rate_pipeline.py
[modify] https://crrev.com/153bea84f73ed4872e1a944f9ca7406d7860a80a/appengine/findit/waterfall/flake/analyze_flake_for_build_number_pipeline.py