Unlike many of the other bots, these are non-Swarmed. The builder zips up the build directory and these testers unzip it. I'm sorry about the difference in behavior but please fix this right away so these bots don't stay red. Either that or let's exclude them from running on these bots until they can pass. (John, feel free to do that in generate_buildbot_json.py and TBR= me.)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/99cfe4eb68b314b441681e7521612d3639024aa6

commit 99cfe4eb68b314b441681e7521612d3639024aa6
Author: jbauman <jbauman@chromium.org>
Date: Sat Apr 08 02:24:47 2017

Disable swiftshader_unittests on some non-swarming GPU FYI mac bots

It's failing on Mac Experimental Retina Release (AMD),
Mac Experimental Retina Release (NVIDIA), and
Mac Pro Release (AMD).

TBR=kbr@chromium.org
BUG=709635
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2801423002
Cr-Commit-Position: refs/heads/master@{#463108}

[modify] https://crrev.com/99cfe4eb68b314b441681e7521612d3639024aa6/content/test/gpu/generate_buildbot_json.py
[modify] https://crrev.com/99cfe4eb68b314b441681e7521612d3639024aa6/testing/buildbot/chromium.gpu.fyi.json

Lowering priority since jbauman fixed the immediate breakage (thanks!) and we don't have to enable these tests again until we look into adding SwiftShader fallback support for Mac OS.