The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/f47e08fb20a5f6e418a9e7be899ab25fc0a4762e

commit f47e08fb20a5f6e418a9e7be899ab25fc0a4762e
Author: Stephen Martinis <martiniss@chromium.org>
Date: Wed Nov 01 01:07:40 2017

SOM: Split alerts by test

This CL splits up alerts per test case in a test suite. Previous CLs
created the ability to have more flexible groups in the frontend. This CL
splits up alerts with test results data into individual alerts per test
failure. These alerts will then be grouped per test case, rather than
test suite.

Bug:780297
Change-Id: Iaf94b1ae8740cc5826a84c991ed7d3b44d9cc397
Reviewed-on: https://chromium-review.googlesource.com/671157
Commit-Queue: Stephen Martinis <martiniss@chromium.org>
Reviewed-by: Sean McCullough <seanmccullough@chromium.org>

[modify] https://crrev.com/f47e08fb20a5f6e418a9e7be899ab25fc0a4762e/go/src/infra/appengine/sheriff-o-matic/som/analyzer/analyzer.go
[modify] https://crrev.com/f47e08fb20a5f6e418a9e7be899ab25fc0a4762e/go/src/infra/appengine/sheriff-o-matic/som/analyzer/step/test_step_test.go
[modify] https://crrev.com/f47e08fb20a5f6e418a9e7be899ab25fc0a4762e/go/src/infra/appengine/sheriff-o-matic/som/analyzer/step/test_step.go