The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/bcee28cb68f095c36fb0c948907abe17116ca8b5

commit bcee28cb68f095c36fb0c948907abe17116ca8b5
Author: Jeffrey Li <lijeffrey@chromium.org>
Date: Tue Jun 12 17:29:09 2018

[Findit] Flake Analyzer - Fix rerun for tryserver.*

When triggering reruns, original_* fields should be used to avoid mismatch
when finding build steps to merge into the existing request created by the
original analysis.

Bug:  851777 
Change-Id: Ife38d09f562a0921e70bdb255c451e9d8bcfc3b4
Reviewed-on: https://chromium-review.googlesource.com/1096550
Reviewed-by: Shuotao Gao <stgao@chromium.org>
Commit-Queue: Jeffrey Li <lijeffrey@chromium.org>

[modify] https://crrev.com/bcee28cb68f095c36fb0c948907abe17116ca8b5/appengine/findit/handlers/flake/check_flake.py
[modify] https://crrev.com/bcee28cb68f095c36fb0c948907abe17116ca8b5/appengine/findit/handlers/flake/test/check_flake_test.py

The fix is incomplete, as the resulting analysis needs to be referenced using the non original_* fields

The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/aa55ce02f2fc5c86b58bb01ad1ca317ac5233aed

commit aa55ce02f2fc5c86b58bb01ad1ca317ac5233aed
Author: Jeffrey Li <lijeffrey@chromium.org>
Date: Fri Jun 15 21:03:57 2018

[Findit] Flake Analyzer - Fixing rerun of cq flakes

Build steps should reference analysis.original_* fields, while the
analyses themselves should be referenced using the regular master_name,
builder_name, etc. fields.

Bug:  851777 
Change-Id: I108e2f18352ce3ece85b1a6eb51a66567c774f83
Reviewed-on: https://chromium-review.googlesource.com/1098309
Reviewed-by: Shuotao Gao <stgao@chromium.org>
Commit-Queue: Jeffrey Li <lijeffrey@chromium.org>

[modify] https://crrev.com/aa55ce02f2fc5c86b58bb01ad1ca317ac5233aed/appengine/findit/handlers/flake/check_flake.py
[modify] https://crrev.com/aa55ce02f2fc5c86b58bb01ad1ca317ac5233aed/appengine/findit/handlers/flake/test/check_flake_test.py
[modify] https://crrev.com/aa55ce02f2fc5c86b58bb01ad1ca317ac5233aed/appengine/findit/waterfall/flake/flake_analysis_service.py