Mark "u2fDevices" permission stable.

Mark "u2fDevices" permission stable.

This permission is used by whitelisted apps and extensions to access all
FIDO Alliance Universal 2nd Factor devices without a hard-coded list of
all present and future vendor and product IDs.

BUG=374307
Committed: https://crrev.com/c28d9d75d03002c23b0aa646f456092c5875bebf
Cr-Commit-Position: refs/heads/master@{#296842}

[Reilly Grant (use Gerrit), 2014-09-25 21:05:06]

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

[Reilly Grant (use Gerrit), 2014-09-25 23:20:05]

reillyg@chromium.org changed reviewers:
+ miket@chromium.org
- asargent@chromium.org

[miket_OOO, 2014-09-26 00:12:27]

lgtm

[Reilly Grant (use Gerrit), 2014-09-26 00:35:24]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2014-09-26 00:36:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/601423002/1

[commit-bot: I haz the power, 2014-09-26 00:41:45]

Committed patchset #1 (id:1) as d37f076c95e4be25ef205edfe45eb8818b8e8f63

[commit-bot: I haz the power, 2014-09-26 00:42:23]

Patchset 1 (id:??) landed as
https://crrev.com/c28d9d75d03002c23b0aa646f456092c5875bebf
Cr-Commit-Position: refs/heads/master@{#296842}