[Files.app] Add a test to check tabfocus

[Files.app] Add a test to check tabfocus

This patch adds tests of transition of tabfocus in Files.app.

BUG=469061
Committed: https://crrev.com/956dde61ed47e00ee40ac6c78f99bfcab7fe4d97
Cr-Commit-Position: refs/heads/master@{#321957}

[yoshiki, 2015-03-19 16:24:49]

Patchset #1 (id:1) has been deleted

[yoshiki, 2015-03-19 16:25:33]

yoshiki@chromium.org changed reviewers:
+ fukino@chromium.org

[yoshiki, 2015-03-20 02:08:09]

fukino-san, PTAL. Thanks.

[yoshiki, 2015-03-20 02:08:11]

fukino-san, PTAL. Thanks.

[fukino, 2015-03-20 05:45:55]

lgtm. Thank you!

[yoshiki, 2015-03-20 06:58:57]

The CQ bit was checked by yoshiki@chromium.org

[commit-bot: I haz the power, 2015-03-20 06:59:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1010213006/40001

[commit-bot: I haz the power, 2015-03-20 08:31:58]

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

[commit-bot: I haz the power, 2015-03-20 08:32:00]

Try jobs failed on following builders:
  linux_chromium_chromeos_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[yoshiki, 2015-03-23 04:54:06]

The CQ bit was checked by yoshiki@chromium.org

[yoshiki, 2015-03-23 04:54:07]

The patchset sent to the CQ was uploaded after l-g-t-m from fukino@chromium.org
Link to the patchset: https://codereview.chromium.org/1010213006/#ps60001
(title: "Fix a test failure")

[commit-bot: I haz the power, 2015-03-23 04:54:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1010213006/60001

[commit-bot: I haz the power, 2015-03-23 06:11:53]

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

[commit-bot: I haz the power, 2015-03-23 06:11:54]

Try jobs failed on following builders:
  linux_chromium_chromeos_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[yoshiki, 2015-03-24 08:23:10]

The CQ bit was checked by yoshiki@chromium.org

[yoshiki, 2015-03-24 08:23:10]

The patchset sent to the CQ was uploaded after l-g-t-m from fukino@chromium.org
Link to the patchset: https://codereview.chromium.org/1010213006/#ps80001
(title: "Fix test failure")

[commit-bot: I haz the power, 2015-03-24 08:23:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1010213006/80001

[commit-bot: I haz the power, 2015-03-24 08:55:45]

Committed patchset #4 (id:80001)

[commit-bot: I haz the power, 2015-03-24 08:56:13]

Patchset 4 (id:??) landed as
https://crrev.com/956dde61ed47e00ee40ac6c78f99bfcab7fe4d97
Cr-Commit-Position: refs/heads/master@{#321957}