gpu: Add disable_blend_equation_advanced workaround for Adreno 4xx.

gpu: Add disable_blend_equation_advanced workaround for Adreno 4xx.

Use of GL_KHR_blend_equation_advance blends for GPU compositing results
in severe graphical corruption.

This workaround disables the extension on Android, Adreno 4xx GPUs.

BUG=488485
Committed: https://crrev.com/76d0b5d711b3292aecbd04a388ebd2d7d221385d
Cr-Commit-Position: refs/heads/master@{#331220}

[vmiura, 2015-05-23 00:13:41]

vmiura@chromium.org changed reviewers:
+ sievers@chromium.org, zmo@chromium.org

[vmiura, 2015-05-23 00:13:41]

PTAL

[Zhenyao Mo, 2015-05-23 00:35:46]

LGTM

[vmiura, 2015-05-23 00:47:24]

The CQ bit was checked by vmiura@chromium.org

[commit-bot: I haz the power, 2015-05-23 00:49:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1154953004/1

[commit-bot: I haz the power, 2015-05-23 02:17:31]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-23 02:18:42]

Patchset 1 (id:??) landed as
https://crrev.com/76d0b5d711b3292aecbd04a388ebd2d7d221385d
Cr-Commit-Position: refs/heads/master@{#331220}