The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/6a004565bbf6c39f075ef1bc41cbbd3a5eaffb7a

commit 6a004565bbf6c39f075ef1bc41cbbd3a5eaffb7a
Author: Xixuan Wu <xixuan@google.com>
Date: Mon Dec 10 23:30:01 2018

autotest: Keep pool unchanged if it's not pre-defined.

BUG=chromium:913623
TEST=Test in staging.

Change-Id: Icd9831633cdf2e38b5d8fdb4fda75f39934df1f3
Reviewed-on: https://chromium-review.googlesource.com/c/1370544
Commit-Queue: Xixuan Wu <xixuan@chromium.org>
Tested-by: Xixuan Wu <xixuan@chromium.org>
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>

[modify] https://crrev.com/6a004565bbf6c39f075ef1bc41cbbd3a5eaffb7a/venv/skylab_suite/suite_runner.py
[modify] https://crrev.com/6a004565bbf6c39f075ef1bc41cbbd3a5eaffb7a/venv/skylab_suite/swarming_lib.py
[modify] https://crrev.com/6a004565bbf6c39f075ef1bc41cbbd3a5eaffb7a/venv/skylab_suite/cros_suite.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/c46dff2ffd5bd97417d7352b5f6d9b5426822b88

commit c46dff2ffd5bd97417d7352b5f6d9b5426822b88
Author: Xixuan Wu <xixuan@google.com>
Date: Mon Dec 10 23:30:14 2018

autotest: Allow customized pool label for skylab.

BUG=chromium:913623
TEST=Test in staging.

Change-Id: I00616897754dc6afe4d9e16b7cf47cdc05af50d9
Reviewed-on: https://chromium-review.googlesource.com/c/1370624
Commit-Queue: Xixuan Wu <xixuan@chromium.org>
Tested-by: Xixuan Wu <xixuan@chromium.org>
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>

[modify] https://crrev.com/c46dff2ffd5bd97417d7352b5f6d9b5426822b88/venv/skylab_suite/suite_parser.py

The following revision refers to this bug:
  https://chrome-internal.googlesource.com/chromeos/infra_internal/skylab_inventory/+/2b6c50872bbf6c316a1b2b4bd345d7fc4ee79a95

commit 2b6c50872bbf6c316a1b2b4bd345d7fc4ee79a95
Author: Xixuan Wu <xixuan@google.com>
Date: Mon Dec 10 22:48:26 2018

The following revision refers to this bug:
  https://chrome-internal.googlesource.com/chromeos/infra_internal/skylab_inventory/+/b5e0e7c48a338b5b6092bd3cf9efb80ef568a0a7

commit b5e0e7c48a338b5b6092bd3cf9efb80ef568a0a7
Author: Xixuan Wu <xixuan@google.com>
Date: Tue Dec 11 22:45:26 2018

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/3dea7cfad8ff572aaa479512d54f0b1cbd5aff68

commit 3dea7cfad8ff572aaa479512d54f0b1cbd5aff68
Author: Xixuan Wu <xixuan@google.com>
Date: Wed Dec 12 21:48:01 2018

autotest: Pass model as child task's dimensions.

BUG=chromium:913623
TEST=Run run_suite_skylab locally.

Change-Id: Idda6667cbc1c16f2827ae8160aa497124ada1e14
Reviewed-on: https://chromium-review.googlesource.com/1374431
Commit-Ready: Xixuan Wu <xixuan@chromium.org>
Tested-by: Xixuan Wu <xixuan@chromium.org>
Reviewed-by: Allen Li <ayatane@chromium.org>

[modify] https://crrev.com/3dea7cfad8ff572aaa479512d54f0b1cbd5aff68/venv/skylab_suite/suite_runner.py
[modify] https://crrev.com/3dea7cfad8ff572aaa479512d54f0b1cbd5aff68/venv/skylab_suite/suite_parser.py
[modify] https://crrev.com/3dea7cfad8ff572aaa479512d54f0b1cbd5aff68/venv/skylab_suite/cros_suite.py

https://docs.google.com/document/d/1u3_HbLha4gbfxFDsjS0GypP6JpqNX0bCpoLuZX3YAHY/edit#heading=h.4h25t7ubpd49

Another blocker: b/122080812