The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/bf8a228d728f54febf97796fb1c7fa589509b74e

commit bf8a228d728f54febf97796fb1c7fa589509b74e
Author: Chan <chanli@chromium.org>
Date: Sat Jan 27 00:09:28 2018

[Findit] Handle attribute error caused by auto-filled None values.

Bug:805670
Change-Id: I8def65444e6ac09f59f50e6a04950f76f5efbbde
Reviewed-on: https://chromium-review.googlesource.com/884570
Commit-Queue: Chan Li <chanli@chromium.org>
Reviewed-by: Jeffrey Li <lijeffrey@chromium.org>
Reviewed-by: Roberto Carrillo <robertocn@chromium.org>

[modify] https://crrev.com/bf8a228d728f54febf97796fb1c7fa589509b74e/appengine/findit/services/compile_failure/compile_try_job.py
[modify] https://crrev.com/bf8a228d728f54febf97796fb1c7fa589509b74e/appengine/findit/services/test_failure/test_failure_analysis.py
[modify] https://crrev.com/bf8a228d728f54febf97796fb1c7fa589509b74e/appengine/findit/services/gtest.py
[modify] https://crrev.com/bf8a228d728f54febf97796fb1c7fa589509b74e/appengine/findit/services/try_job.py
[modify] https://crrev.com/bf8a228d728f54febf97796fb1c7fa589509b74e/appengine/findit/services/gerrit.py
[modify] https://crrev.com/bf8a228d728f54febf97796fb1c7fa589509b74e/appengine/findit/services/monitoring.py
[modify] https://crrev.com/bf8a228d728f54febf97796fb1c7fa589509b74e/appengine/findit/services/test_failure/test_try_job.py