Promote hid.onDeviceAdded and hid.onDeviceRemoved to stable.

Promote hid.onDeviceAdded and hid.onDeviceRemoved to stable.

These events have been enabled during the M-41 dev cycle and are ready
to be enabled for M-41 stable.

BUG=442543
Committed: https://crrev.com/a4473fef82e30240d8ad5eebf11b77e88c82f3f2
Cr-Commit-Position: refs/heads/master@{#310166}

[Reilly Grant (use Gerrit), 2015-01-06 02:19:29]

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

[Reilly Grant (use Gerrit), 2015-01-06 02:19:30]

Ken, please approve the stabilization of this API in M-41.

[Ken Rockot(use gerrit already), 2015-01-06 21:26:01]

On 2015/01/06 02:19:30, reillyg wrote:
> Ken, please approve the stabilization of this API in M-41.

lgtm

[Reilly Grant (use Gerrit), 2015-01-06 22:15:43]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2015-01-06 22:16:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/835993003/1

[commit-bot: I haz the power, 2015-01-06 23:13:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-06 23:14:12]

Patchset 1 (id:??) landed as
https://crrev.com/a4473fef82e30240d8ad5eebf11b77e88c82f3f2
Cr-Commit-Position: refs/heads/master@{#310166}