Set keys for the device permissions dialog action buttons.

Set keys for the device permissions dialog action buttons.

This change makes the Select button active by default. The Return key will
activate the Select button and the Esc key will activate the Cancel button.
This makes the dialog fully operable from the keyboard.

BUG=426737
Committed: https://crrev.com/7cf829d6733f446b1a7fbaf6f6063b59dd180792
Cr-Commit-Position: refs/heads/master@{#301302}

[Reilly Grant (use Gerrit), 2014-10-25 13:17:31]

reillyg@chromium.org changed reviewers:
+ avi@chromium.org

[Avi (use Gerrit), 2014-10-25 15:12:54]

lgtm

I have to trust you on this; the diff is useless. Looks like you hit the
Interface Builder "renumber ALL the objects" jackpot.

[Reilly Grant (use Gerrit), 2014-10-25 16:52:31]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2014-10-25 17:00:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/677853002/1

[commit-bot: I haz the power, 2014-10-25 17:04:40]

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

[commit-bot: I haz the power, 2014-10-25 17:04:41]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[Reilly Grant (use Gerrit), 2014-10-26 04:56:28]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2014-10-26 04:57:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/677853002/20001

[commit-bot: I haz the power, 2014-10-26 05:40:07]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2014-10-26 05:41:01]

Patchset 2 (id:??) landed as
https://crrev.com/7cf829d6733f446b1a7fbaf6f6063b59dd180792
Cr-Commit-Position: refs/heads/master@{#301302}