The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/overlays/chromiumos-overlay/+/b1af125f53319fe8378dae47a18cdc8222576f5f

commit b1af125f53319fe8378dae47a18cdc8222576f5f
Author: David Haddock <dhaddock@chromium.org>
Date: Fri Mar 02 03:13:42 2018

Add new tests to ebuilds.

BUG= chromium:817539 
TEST=None

Change-Id: I7de4536f8b1d8d51f05e55c51db9cdaf5bfd1406
Reviewed-on: https://chromium-review.googlesource.com/941514
Commit-Ready: David Haddock <dhaddock@chromium.org>
Tested-by: David Haddock <dhaddock@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>

[modify] https://crrev.com/b1af125f53319fe8378dae47a18cdc8222576f5f/chromeos-base/autotest-server-tests/autotest-server-tests-9999.ebuild
[modify] https://crrev.com/b1af125f53319fe8378dae47a18cdc8222576f5f/chromeos-base/autotest-chrome/autotest-chrome-9999.ebuild

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/7c9b30e6bcf8ceadb8da26a902728884bd5e3946

commit 7c9b30e6bcf8ceadb8da26a902728884bd5e3946
Author: David Haddock <dhaddock@chromium.org>
Date: Fri Mar 02 03:13:49 2018

Add a test for end of life (EOL) / Autoupdate expiration (AUE).

This test ensures that when the DUT receives an omaha response
containing EOL that the status changes and a notification is shown to
the users.

To do this I added functionaly to nano_omaha_devserver to return end of
life response.

BUG= chromium:817539 
TEST=autoupdate_Cellular.delta
TEST=autoupdate_EOL

Change-Id: Ib29504e3f64c2dec7a60e7e11c8f9bc2a2f42f53
Reviewed-on: https://chromium-review.googlesource.com/941513
Commit-Ready: David Haddock <dhaddock@chromium.org>
Tested-by: David Haddock <dhaddock@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>

[add] https://crrev.com/7c9b30e6bcf8ceadb8da26a902728884bd5e3946/client/site_tests/autoupdate_EOL/autoupdate_EOL.py
[modify] https://crrev.com/7c9b30e6bcf8ceadb8da26a902728884bd5e3946/client/cros/update_engine/nano_omaha_devserver.py
[add] https://crrev.com/7c9b30e6bcf8ceadb8da26a902728884bd5e3946/client/site_tests/autoupdate_EOL/control

Results look great:
https://stainless.corp.google.com/search?test=%5Eautoupdate%5C_EOL%24&exclude_non_release=true&exclude_cts=true&col=build&row=model&view=matrix&first_date=2018-03-20&last_date=2018-03-26

I'll follow up on failures on daisy and astronaut in a new bug when I get some time to investigate