ozone: evdev: Minor refactor of device open

ozone: evdev: Minor refactor of device open

Use a struct to reduce the number of arguments passed via the callback
and clean up the surrounding code a bit.

BUG=none
TEST=events_unittests, link_freon

Committed: https://crrev.com/de3b5291040214ae9cc8b4f0d2d3c4f95180d3e5
Cr-Commit-Position: refs/heads/master@{#299472}

[spang, 2014-10-09 20:14:17]

spang@chromium.org changed reviewers:
+ kpschoedel@chromium.org

[kpschoedel, 2014-10-09 20:56:34]

LGTM

https://codereview.chromium.org/645673003/diff/1/ui/events/ozone/evdev/event_...
File ui/events/ozone/evdev/event_dispatch_callback.h (right):

https://codereview.chromium.org/645673003/diff/1/ui/events/ozone/evdev/event_...
ui/events/ozone/evdev/event_dispatch_callback.h:16: }  // namspace ui
Nit: You don't KNOW, man. You weren't THERE.

[spang, 2014-10-14 13:39:45]

The CQ bit was checked by spang@chromium.org

[commit-bot: I haz the power, 2014-10-14 13:40:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/645673003/1

[spang, 2014-10-14 14:03:04]

The CQ bit was unchecked by spang@chromium.org

[commit-bot: I haz the power, 2014-10-14 14:03:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-14 14:04:02]

Patchset 1 (id:??) landed as
https://crrev.com/de3b5291040214ae9cc8b4f0d2d3c4f95180d3e5
Cr-Commit-Position: refs/heads/master@{#299472}