Added Blink-side support for EXT_blend_minmax WebGL extension

Added Blink-side support for EXT_blend_minmax WebGL extension

BUG=344451
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=173937

[bajones, 2014-05-12 23:32:18]

While triaging some WebGL tickets I realized that this extension would be
extremely simple to expose, so might as well just do it! PTAL

[bajones, 2014-05-12 23:34:55]

FYI, Chrome-side is here: https://codereview.chromium.org/286553002/

[Zhenyao Mo, 2014-05-12 23:40:40]

On 2014/05/12 23:34:55, bajones wrote:
> FYI, Chrome-side is here: https://codereview.chromium.org/286553002/

LGTM

[haraken, 2014-05-12 23:45:48]

bindings/ LGTM.

[Ken Russell (switch to Gerrit), 2014-05-12 23:50:50]

lgtm

[bajones, 2014-05-12 23:55:10]

The CQ bit was checked by bajones@chromium.org

[commit-bot: I haz the power, 2014-05-12 23:55:26]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/bajones@chromium.org/287563002/1

[commit-bot: I haz the power, 2014-05-13 01:18:49]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  linux_blink_dbg on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/linux_blink_dbg/builds/7268)
  linux_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/linux_blink_rel/builds/7037)
  mac_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/mac_blink_rel/builds/6516)
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/6991)

[commit-bot: I haz the power, 2014-05-13 01:57:14]

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

[commit-bot: I haz the power, 2014-05-13 01:57:14]

Try jobs failed on following builders:
  linux_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/linux_blink_rel/builds/7038)

[bajones, 2014-05-13 05:45:36]

The CQ bit was checked by bajones@chromium.org

[commit-bot: I haz the power, 2014-05-13 05:45:42]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/bajones@chromium.org/287563002/20001

[commit-bot: I haz the power, 2014-05-13 07:00:51]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/7012)

[commit-bot: I haz the power, 2014-05-13 07:52:45]

Change committed as 173937