GLContextGLX: try all GL versions from the highest.

GLContextGLX: try all GL versions from the highest.

Also try all ES versions from the highest. This change will allow
Chrome to create a GL context higher than 3.0 on Mesa and will in turn
allow WebGL2 to run on Intel Linux when using the native GL driver.

This patch is a direct port of the logic in ANGLE's DisplayGLX

This is a reland of 3d090e4477520e14b782d2398e4a143982e189d4 after
fixes for core profile support on Intel Mesa.

This was a reland of 3464004765597c914d8499ee9792cf81e106a4ae trying a
compatibility context first instead of a core context. (for non-Mesa
drivers)

BUG=598902
Review-Url: https://codereview.chromium.org/1999543003
Review-Url: https://codereview.chromium.org/2098613004
Committed: https://crrev.com/35ec773b64c07f58b0e59377d917f6424edda189
Cr-Original-Original-Commit-Position: refs/heads/master@{#396243}
Cr-Original-Commit-Position: refs/heads/master@{#402291}
Cr-Commit-Position: refs/heads/master@{#404698}

[Corentin Wallez, 2016-07-11 17:16:00]

cwallez@chromium.org changed reviewers:
+ kbr@chromium.org, piman@chromium.org, zmo@chromium.org

[Corentin Wallez, 2016-07-11 17:17:04]

PTAL, this is another reland of this patch. There are no modifications compared
to the previous version of this patch. Instead further fixes to Chromium's
handling of the core profile have been done.

[Ken Russell (switch to Gerrit), 2016-07-11 17:42:00]

LGTM. Let's try it again.

[piman, 2016-07-11 17:58:05]

lgtm

[Corentin Wallez, 2016-07-11 18:00:21]

The CQ bit was checked by cwallez@chromium.org

[Corentin Wallez, 2016-07-11 18:00:21]

Thanks, CQing.

[commit-bot: I haz the power, 2016-07-11 18:00:53]

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, 2016-07-11 18:48:52]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-11 18:50:42]

Description was changed from

==========
GLContextGLX: try all GL versions from the highest.

Also try all ES versions from the highest. This change will allow
Chrome to create a GL context higher than 3.0 on Mesa and will in turn
allow WebGL2 to run on Intel Linux when using the native GL driver.

This patch is a direct port of the logic in ANGLE's DisplayGLX

This is a reland of 3d090e4477520e14b782d2398e4a143982e189d4 after
fixes for core profile support on Intel Mesa.

This was a reland of 3464004765597c914d8499ee9792cf81e106a4ae trying a
compatibility context first instead of a core context. (for non-Mesa
drivers)

BUG=598902

Review-Url: https://codereview.chromium.org/1999543003
Review-Url: https://codereview.chromium.org/2098613004
Cr-Original-Commit-Position: refs/heads/master@{#396243}
Cr-Commit-Position: refs/heads/master@{#402291}
==========

to

==========
GLContextGLX: try all GL versions from the highest.

Also try all ES versions from the highest. This change will allow
Chrome to create a GL context higher than 3.0 on Mesa and will in turn
allow WebGL2 to run on Intel Linux when using the native GL driver.

This patch is a direct port of the logic in ANGLE's DisplayGLX

This is a reland of 3d090e4477520e14b782d2398e4a143982e189d4 after
fixes for core profile support on Intel Mesa.

This was a reland of 3464004765597c914d8499ee9792cf81e106a4ae trying a
compatibility context first instead of a core context. (for non-Mesa
drivers)

BUG=598902

Review-Url: https://codereview.chromium.org/1999543003
Review-Url: https://codereview.chromium.org/2098613004
Committed: https://crrev.com/35ec773b64c07f58b0e59377d917f6424edda189
Cr-Original-Original-Commit-Position: refs/heads/master@{#396243}
Cr-Original-Commit-Position: refs/heads/master@{#402291}
Cr-Commit-Position: refs/heads/master@{#404698}
==========

[commit-bot: I haz the power, 2016-07-11 18:50:45]

Patchset 1 (id:??) landed as
https://crrev.com/35ec773b64c07f58b0e59377d917f6424edda189
Cr-Commit-Position: refs/heads/master@{#404698}