Do follow-up refactoring in rebaseline.py in _run_in_parallel and _serial_commands.

Do follow-up refactoring in rebaseline.py in _run_in_parallel and _serial_commands.

The purpose of this CL is to make the code a little simpler and easier to read.

Committed: https://crrev.com/c76a2deae879d652b690d9f4d30e8c26f4c22b30
Cr-Commit-Position: refs/heads/master@{#420580}

[qyearsley, 2016-09-22 22:05:55]

Description was changed from

==========
Done with refactoring changes, one test fails


More changes in rebaseline for refactoring

BUG=
==========

to

==========
Do follow-up refactoring in rebaseline.py in _run_in_parallel and
_serial_commands.

The purpose of this CL is to make the code a little simpler and easier to read.
==========

[qyearsley, 2016-09-22 22:05:55]

qyearsley@chromium.org changed reviewers:
+ dpranke@chromium.org, jeffcarp@chromium.org

[Dirk Pranke, 2016-09-22 23:14:14]

lgtm

[qyearsley, 2016-09-23 04:01:46]

The CQ bit was checked by qyearsley@chromium.org

[commit-bot: I haz the power, 2016-09-23 04:02:03]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-23 05:06:05]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-09-23 05:07:25]

Description was changed from

==========
Do follow-up refactoring in rebaseline.py in _run_in_parallel and
_serial_commands.

The purpose of this CL is to make the code a little simpler and easier to read.
==========

to

==========
Do follow-up refactoring in rebaseline.py in _run_in_parallel and
_serial_commands.

The purpose of this CL is to make the code a little simpler and easier to read.

Committed: https://crrev.com/c76a2deae879d652b690d9f4d30e8c26f4c22b30
Cr-Commit-Position: refs/heads/master@{#420580}
==========

[commit-bot: I haz the power, 2016-09-23 05:07:26]

Patchset 2 (id:??) landed as
https://crrev.com/c76a2deae879d652b690d9f4d30e8c26f4c22b30
Cr-Commit-Position: refs/heads/master@{#420580}