[PATCH 9.2/11] ozone: evdev: Use DeviceEventDispatcherEvdev from InputInjectorEvdev

ozone: evdev: Use DeviceEventDispatcherEvdev from InputInjectorEvdev

This makes the injector use the same interface as the devices
themselves. It also allows us to remove the PostTask after ui::Event
construction from EventFactoryEvdev, because all dispatches already
start in their own task (posted by ForwardingDeviceEventDispatcher).

BUG=449710
TEST=boot link_freon & move mouse

Committed: https://crrev.com/72486d99c52d26ee06446115644d1d2ab7b34efd
Cr-Commit-Position: refs/heads/master@{#313878}

[spang, 2015-01-26 22:43:53]

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

[alexst (slow to review), 2015-01-28 18:41:35]

lgtm

[spang, 2015-01-30 06:26:31]

The CQ bit was checked by spang@chromium.org

[commit-bot: I haz the power, 2015-01-30 06:26:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/882503002/60001

[spang, 2015-01-30 06:27:19]

The CQ bit was unchecked by spang@chromium.org

[spang, 2015-01-30 06:58:08]

The CQ bit was checked by spang@chromium.org

[commit-bot: I haz the power, 2015-01-30 06:59:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/882503002/60001

[commit-bot: I haz the power, 2015-01-30 07:08:25]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2015-01-30 07:09:07]

Patchset 4 (id:??) landed as
https://crrev.com/72486d99c52d26ee06446115644d1d2ab7b34efd
Cr-Commit-Position: refs/heads/master@{#313878}