Check HID access by device node path instead of sysfs path.

Check HID access by device node path instead of sysfs path.

The permission broker expects clients to request device access by their
device node path instead of the sysfs device path (though this is
slightly less efficient and perhaps should be changed). The HID
permissions prompt code was sending the device ID (which is the sysfs
path) instead of the device node path. This patch fixes that.

BUG=457899
Committed: https://crrev.com/bf9ea5b48d50d730fe723a8ee58e3ba8b48bfccd
Cr-Commit-Position: refs/heads/master@{#338359}

[Reilly Grant (use Gerrit), 2015-07-09 22:38:52]

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

[Reilly Grant (use Gerrit), 2015-07-09 22:38:52]

Sorry, you're the only person who will understand my patches.

[Ken Rockot(use gerrit already), 2015-07-10 20:22:50]

lgtm

[Reilly Grant (use Gerrit), 2015-07-10 20:28:03]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2015-07-10 20:28:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1228103004/1

[commit-bot: I haz the power, 2015-07-10 21:22:01]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-10 21:23:24]

Patchset 1 (id:??) landed as
https://crrev.com/bf9ea5b48d50d730fe723a8ee58e3ba8b48bfccd
Cr-Commit-Position: refs/heads/master@{#338359}