The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/f18845a98938bc03fcba384db7df71ba1f638f08

commit f18845a98938bc03fcba384db7df71ba1f638f08
Author: Jeffrey Li <lijeffrey@chromium.org>
Date: Mon Sep 24 22:14:06 2018

[Findit] Flake Analyzer - Surface information on recent flakiness (handler-side)

Adding most up-to-date flakiness information to check_flake handler.
1. If a recent flakiness verification data point is available, use its
   information.
2. Otherwise, the most recent flakiness verification is the first data
   point of the analysis.

UI change in a separate CL.

Bug:  887741 
Change-Id: I594b5ab3eaf0c97dcfdc179c6b96d6d739a5e47c
Reviewed-on: https://chromium-review.googlesource.com/1237420
Reviewed-by: Yuke Liao <liaoyuke@chromium.org>
Commit-Queue: Jeffrey Li <lijeffrey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#17840}
[modify] https://crrev.com/f18845a98938bc03fcba384db7df71ba1f638f08/appengine/findit/handlers/flake/check_flake.py
[modify] https://crrev.com/f18845a98938bc03fcba384db7df71ba1f638f08/appengine/findit/handlers/flake/test/check_flake_test.py
[modify] https://crrev.com/f18845a98938bc03fcba384db7df71ba1f638f08/appengine/findit/model/flake/analysis/test/master_flake_analysis_test.py
[modify] https://crrev.com/f18845a98938bc03fcba384db7df71ba1f638f08/appengine/findit/model/flake/analysis/master_flake_analysis.py