John, is this something you can look into? It's important that this bot not turn purple if there's an error in one of the steps. If not, who do you think can look into this?

Yeah, I can look at this.

Both of the Android bots on chromium.gpu.fyi are misconfigured AFAICT. N5X and N9 are both arm64, but they're configured as arm. I don't think the purple is showing up on the N5X only because it's not trying to symbolize anything.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/tools/build.git/+/ffce40792089439cd1f9ff501e876fb9f077e651

commit ffce40792089439cd1f9ff501e876fb9f077e651
Author: jbudorick@chromium.org <jbudorick@chromium.org>
Date: Mon May 09 19:33:15 2016

[Android] Switch chromium.gpu.fyi Android bots to arm64.

N5X and N9 are both arm64 devices.

BUG= 610040 

Review-Url: https://codereview.chromium.org/1958253002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/build@300509 0039d316-1c4b-4281-b951-d872f2087c98

[modify] https://crrev.com/ffce40792089439cd1f9ff501e876fb9f077e651/scripts/slave/recipe_modules/chromium_tests/chromium_gpu_fyi.py
[modify] https://crrev.com/ffce40792089439cd1f9ff501e876fb9f077e651/scripts/slave/recipes/chromium.expected/full_chromium_gpu_fyi_Android_Debug__Nexus_5X_.json
[modify] https://crrev.com/ffce40792089439cd1f9ff501e876fb9f077e651/scripts/slave/recipes/chromium.expected/full_chromium_gpu_fyi_Android_Debug__Nexus_9_.json

The following revision refers to this bug:
  http://goto.ext.google.com/viewvc/chrome-internal?view=rev&revision=87617

------------------------------------------------------------------
r87617 | recipe-roller@chromium.org | 2016-05-09T19:42:57.359310Z

-----------------------------------------------------------------

Thanks John for diagnosing and fixing this. It really had me stumped.

You're welcome. The bot is back to green as of https://build.chromium.org/p/chromium.gpu.fyi/builders/Android%20Debug%20%28Nexus%209%29/builds/860