Remove synchronous GetDisplays() and Configure() from NativeDisplayDelegate

Remove synchronous GetDisplays() and Configure() from NativeDisplayDelegate

Cleaning up since the entry points should not be used/needed anymore.
Also removing the Configure() calls from TakeControl() and replace them
with a call to probe and configure displays.

BUG=429746
Committed: https://crrev.com/eddd4aa229c29b89b50a60ba4ec243c8114d8fc5
Cr-Commit-Position: refs/heads/master@{#308250}

[dnicoara, 2014-12-12 01:42:44]

dnicoara@chromium.org changed reviewers:
+ derat@chromium.org, spang@chromium.org

[dnicoara, 2014-12-12 01:42:45]

PTAL

Depends on https://codereview.chromium.org/801493002/

derat@ for everything
spang@ for Ozone

[Daniel Erat, 2014-12-12 16:28:25]

lgtm

[spang, 2014-12-12 18:20:07]

lgtm

[dnicoara, 2014-12-12 22:34:57]

The CQ bit was checked by dnicoara@chromium.org

[commit-bot: I haz the power, 2014-12-12 22:36:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/796263002/20001

[dnicoara, 2014-12-12 23:47:54]

The CQ bit was unchecked by dnicoara@chromium.org

[dnicoara, 2014-12-13 02:35:43]

The CQ bit was checked by dnicoara@chromium.org

[commit-bot: I haz the power, 2014-12-13 02:38:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/796263002/20001

[commit-bot: I haz the power, 2014-12-13 03:13:35]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-12-13 03:13:36]

Try jobs failed on following builders:
  linux_chromium_chromeos_rel_ng on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[dnicoara, 2014-12-13 03:56:48]

The CQ bit was checked by dnicoara@chromium.org

[commit-bot: I haz the power, 2014-12-13 03:57:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/796263002/40001

[commit-bot: I haz the power, 2014-12-13 04:29:05]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2014-12-13 04:29:56]

Patchset 3 (id:??) landed as
https://crrev.com/eddd4aa229c29b89b50a60ba4ec243c8114d8fc5
Cr-Commit-Position: refs/heads/master@{#308250}