Revert of exo: Disable RGBX fullscreen overlays.

Revert of exo: Disable RGBX fullscreen overlays. (patchset #1 id:1 of https://codereview.chromium.org/2278803003/ )

Reason for revert:
crrev.com/2281033003 makes it so the compositor sends only one plane to Ozone.

In this way Ozone will accept an RGBX fullscreen plane.

Original issue's description:
> exo: Disable RGBX fullscreen overlays.
>
> Fullscreen overlays have been enabled on minnie.
> Unfortunately there are some issues in HardwareDisplayPlaneManager::
> AssignOverlayPlanes with RGBX buffers.
>
> This patch disables the overlay optimization for those buffers
> while we work on a fix.
>
> BUG=b/29430506
>
> Committed: https://crrev.com/18d1778af83ec9877cdf33401eddf4b082f766ef
> Cr-Commit-Position: refs/heads/master@{#414281}

TBR=reveman@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=b/29430506

Committed: https://crrev.com/15f606fd19cdecf925c81936fae6abb0dda1f553
Cr-Commit-Position: refs/heads/master@{#414853}

[Daniele Castagna, 2016-08-26 22:23:44]

The CQ bit was checked by dcastagna@chromium.org

[Daniele Castagna, 2016-08-26 22:23:44]

Created Revert of exo: Disable RGBX fullscreen overlays.

[commit-bot: I haz the power, 2016-08-26 22:24:33]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-26 23:14:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-26 23:16:22]

Description was changed from

==========
Revert of exo: Disable RGBX fullscreen overlays. (patchset #1 id:1 of
https://codereview.chromium.org/2278803003/ )

Reason for revert:
crrev.com/2281033003 makes it so the compositor sends only one plane to Ozone.

In this way Ozone will accept an RGBX fullscreen plane.

Original issue's description:
> exo: Disable RGBX fullscreen overlays.
> 
> Fullscreen overlays have been enabled on minnie.
> Unfortunately there are some issues in HardwareDisplayPlaneManager::
> AssignOverlayPlanes with RGBX buffers.
> 
> This patch disables the overlay optimization for those buffers
> while we work on a fix.
> 
> BUG=b/29430506
> 
> Committed: https://crrev.com/18d1778af83ec9877cdf33401eddf4b082f766ef
> Cr-Commit-Position: refs/heads/master@{#414281}

TBR=reveman@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=b/29430506
==========

to

==========
Revert of exo: Disable RGBX fullscreen overlays. (patchset #1 id:1 of
https://codereview.chromium.org/2278803003/ )

Reason for revert:
crrev.com/2281033003 makes it so the compositor sends only one plane to Ozone.

In this way Ozone will accept an RGBX fullscreen plane.

Original issue's description:
> exo: Disable RGBX fullscreen overlays.
>
> Fullscreen overlays have been enabled on minnie.
> Unfortunately there are some issues in HardwareDisplayPlaneManager::
> AssignOverlayPlanes with RGBX buffers.
>
> This patch disables the overlay optimization for those buffers
> while we work on a fix.
>
> BUG=b/29430506
>
> Committed: https://crrev.com/18d1778af83ec9877cdf33401eddf4b082f766ef
> Cr-Commit-Position: refs/heads/master@{#414281}

TBR=reveman@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=b/29430506

Committed: https://crrev.com/15f606fd19cdecf925c81936fae6abb0dda1f553
Cr-Commit-Position: refs/heads/master@{#414853}
==========

[commit-bot: I haz the power, 2016-08-26 23:16:22]

Patchset 1 (id:??) landed as
https://crrev.com/15f606fd19cdecf925c81936fae6abb0dda1f553
Cr-Commit-Position: refs/heads/master@{#414853}