exo: Fix null dereference in Buffer::ProduceTextureMailbox.

exo: Fix null dereference in Buffer::ProduceTextureMailbox.

Make sure contents_texture_ is not reset before being dereferenced.

BUG=549781
TEST=exo_unittests
TBR=lpique@chromium.org

Committed: https://crrev.com/17fdee02d009e067d68a400aa6896b6ea40cd31f
Cr-Commit-Position: refs/heads/master@{#374602}

[reveman, 2016-02-10 01:59:21]

The CQ bit was checked by reveman@chromium.org

[commit-bot: I haz the power, 2016-02-10 02:04:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1687733002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1687733002/1

[commit-bot: I haz the power, 2016-02-10 02:18:24]

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

[commit-bot: I haz the power, 2016-02-10 02:18:25]

Try jobs failed on following builders:
  chromeos_amd64-generic_chromium_compile_only_ng on tryserver.chromium.linux
(JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromeos_amd64-...)

[reveman, 2016-02-10 04:04:41]

The CQ bit was checked by reveman@chromium.org

[commit-bot: I haz the power, 2016-02-10 04:05:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1687733002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1687733002/1

[Junichi Uekawa, 2016-02-10 04:19:25]

The CQ bit was checked by uekawa@chromium.org

[commit-bot: I haz the power, 2016-02-10 04:19:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1687733002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1687733002/1

[commit-bot: I haz the power, 2016-02-10 04:26:54]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-10 04:28:11]

Description was changed from

==========
exo: Fix null dereference in Buffer::ProduceTextureMailbox.

Make sure contents_texture_ is not reset before being dereferenced.

BUG=549781
TEST=exo_unittests
TBR=lpique@chromium.org
==========

to

==========
exo: Fix null dereference in Buffer::ProduceTextureMailbox.

Make sure contents_texture_ is not reset before being dereferenced.

BUG=549781
TEST=exo_unittests
TBR=lpique@chromium.org

Committed: https://crrev.com/17fdee02d009e067d68a400aa6896b6ea40cd31f
Cr-Commit-Position: refs/heads/master@{#374602}
==========

[commit-bot: I haz the power, 2016-02-10 04:28:12]

Patchset 1 (id:??) landed as
https://crrev.com/17fdee02d009e067d68a400aa6896b6ea40cd31f
Cr-Commit-Position: refs/heads/master@{#374602}

[lpique, 2016-02-10 17:22:38]

lgtm