Handle glTex{Sub}Image* calls with height==0.

Handle glTex{Sub}Image* calls with height==0.

It is legal, and we have a bug handling such cases.

BUG=582695
TEST=webgl_conformance (to be rolled in)
R=vmiura@chromium.org

Committed: https://crrev.com/cd81fc01b4fc01c843905ddc77beb452a6942d2c
Cr-Commit-Position: refs/heads/master@{#373043}

[Zhenyao Mo, 2016-02-01 18:55:17]

The CQ bit was checked by zmo@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-02-01 18:57:07]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1653063002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1653063002/1

[Zhenyao Mo, 2016-02-01 19:05:55]

Victor: can you take a look?

The test case is added to WebGL conformance here:
https://github.com/KhronosGroup/WebGL/pull/1457

It should land and be rolled into chromium soon.

[commit-bot: I haz the power, 2016-02-01 20:11:00]

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

[commit-bot: I haz the power, 2016-02-01 20:11:00]

Dry run: This issue passed the CQ dry run.

[vmiura, 2016-02-02 19:09:20]

LGTM

[vmiura, 2016-02-02 19:09:26]

The CQ bit was checked by vmiura@chromium.org

[commit-bot: I haz the power, 2016-02-02 19:10:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1653063002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1653063002/1

[commit-bot: I haz the power, 2016-02-02 21:25:58]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-02 21:26:59]

Description was changed from

==========
Handle glTex{Sub}Image* calls with height==0.

It is legal, and we have a bug handling such cases.

BUG=582695
TEST=webgl_conformance (to be rolled in)
R=vmiura@chromium.org
==========

to

==========
Handle glTex{Sub}Image* calls with height==0.

It is legal, and we have a bug handling such cases.

BUG=582695
TEST=webgl_conformance (to be rolled in)
R=vmiura@chromium.org

Committed: https://crrev.com/cd81fc01b4fc01c843905ddc77beb452a6942d2c
Cr-Commit-Position: refs/heads/master@{#373043}
==========

[commit-bot: I haz the power, 2016-02-02 21:27:00]

Patchset 1 (id:??) landed as
https://crrev.com/cd81fc01b4fc01c843905ddc77beb452a6942d2c
Cr-Commit-Position: refs/heads/master@{#373043}