Revert of [Android] Switch chromium.gpu bots to mb.

Revert of [Android] Switch chromium.gpu bots to mb. (patchset #1 id:1 of https://codereview.chromium.org/1857053002/ )

Reason for revert:
broke gpu bots on failure to find goma?

Original issue's description:
> [Android] Switch chromium.gpu bots to mb.
>
> BUG=577008
>
> Committed: https://crrev.com/4c73a03acc7c1c600a19ede9fe12dde42e804dec
> Cr-Commit-Position: refs/heads/master@{#385785}

TBR=mikecase@chromium.org,stip@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=577008
Committed: https://crrev.com/7d0a549bdc50729f8bc4a07f8910713c1eaac380
Cr-Commit-Position: refs/heads/master@{#385789}

[jbudorick, 2016-04-07 17:00:46]

Created Revert of [Android] Switch chromium.gpu bots to mb.

[commit-bot: I haz the power, 2016-04-07 17:00:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1867063002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1867063002/1

[commit-bot: I haz the power, 2016-04-07 17:01:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1867063002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1867063002/1

[commit-bot: I haz the power, 2016-04-07 17:02:07]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-07 17:03:13]

Description was changed from

==========
Revert of [Android] Switch chromium.gpu bots to mb. (patchset #1 id:1 of
https://codereview.chromium.org/1857053002/ )

Reason for revert:
broke gpu bots on failure to find goma?

Original issue's description:
> [Android] Switch chromium.gpu bots to mb.
> 
> BUG=577008
> 
> Committed: https://crrev.com/4c73a03acc7c1c600a19ede9fe12dde42e804dec
> Cr-Commit-Position: refs/heads/master@{#385785}

TBR=mikecase@chromium.org,stip@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=577008
==========

to

==========
Revert of [Android] Switch chromium.gpu bots to mb. (patchset #1 id:1 of
https://codereview.chromium.org/1857053002/ )

Reason for revert:
broke gpu bots on failure to find goma?

Original issue's description:
> [Android] Switch chromium.gpu bots to mb.
>
> BUG=577008
>
> Committed: https://crrev.com/4c73a03acc7c1c600a19ede9fe12dde42e804dec
> Cr-Commit-Position: refs/heads/master@{#385785}

TBR=mikecase@chromium.org,stip@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=577008

Committed: https://crrev.com/7d0a549bdc50729f8bc4a07f8910713c1eaac380
Cr-Commit-Position: refs/heads/master@{#385789}
==========

[commit-bot: I haz the power, 2016-04-07 17:03:14]

Patchset 1 (id:??) landed as
https://crrev.com/7d0a549bdc50729f8bc4a07f8910713c1eaac380
Cr-Commit-Position: refs/heads/master@{#385789}