Only run mojo_{shell,application_manager,view_manager}_unittests on linux

Only run mojo_{shell,application_manager,view_manager}_unittests on linux

BUG=
R=sky@chromium.org

Committed: https://crrev.com/d4473cd380e11c40da9c41d87ea0b76969adeab4
Cr-Commit-Position: refs/heads/master@{#295778}

[DaveMoore, 2014-09-19 18:07:06]

davemoore@chromium.org changed reviewers:
+ sky@chromium.org

[sky, 2014-09-19 19:50:18]

LGTM

[DaveMoore, 2014-09-19 20:00:49]

The CQ bit was checked by davemoore@chromium.org

[DaveMoore, 2014-09-19 20:20:18]

The CQ bit was unchecked by davemoore@chromium.org

[DaveMoore, 2014-09-19 20:20:22]

The CQ bit was checked by davemoore@chromium.org

[commit-bot: I haz the power, 2014-09-19 20:26:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/589493003/1

[commit-bot: I haz the power, 2014-09-19 20:26:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/589493003/1

[commit-bot: I haz the power, 2014-09-19 21:06:40]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-09-19 21:06:41]

Try jobs failed on following builders:
  ios_rel_device_ninja on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device_ni...)

[DaveMoore, 2014-09-19 21:10:20]

The CQ bit was checked by davemoore@chromium.org

[DaveMoore, 2014-09-19 21:10:23]

The CQ bit was unchecked by davemoore@chromium.org

[DaveMoore, 2014-09-19 21:13:21]

Committed patchset #1 (id:1) manually as d4473cd (presubmit successful).

[commit-bot: I haz the power, 2014-09-19 21:13:22]

Patchset 1 (id:??) landed as
https://crrev.com/d4473cd380e11c40da9c41d87ea0b76969adeab4
Cr-Commit-Position: refs/heads/master@{#295778}