Update WebGL2 conformance test expectations on Mac.

Update WebGL2 conformance test expectations on Mac.

BUG=
TEST=webgl2_conformance
TBR=kbr@chromium.org
NOTRY=true
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Committed: https://crrev.com/9f2739b9a965955b8f4244bd8dd43f43718a4405
Cr-Commit-Position: refs/heads/master@{#414647}

[Zhenyao Mo, 2016-08-25 20:06:33]

Description was changed from

==========
Update WebGL2 conformance test expectations on Mac.

BUG=
TEST=webgl2_conformance
TBR=kbr@chromium.org
NOTRY=true
==========

to

==========
Update WebGL2 conformance test expectations on Mac.

BUG=
TEST=webgl2_conformance
TBR=kbr@chromium.org
NOTRY=true
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
==========

[Zhenyao Mo, 2016-08-26 03:52:27]

The CQ bit was checked by zmo@chromium.org

[commit-bot: I haz the power, 2016-08-26 03:52:51]

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, 2016-08-26 03:56:50]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-08-26 03:59:21]

Description was changed from

==========
Update WebGL2 conformance test expectations on Mac.

BUG=
TEST=webgl2_conformance
TBR=kbr@chromium.org
NOTRY=true
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
==========

to

==========
Update WebGL2 conformance test expectations on Mac.

BUG=
TEST=webgl2_conformance
TBR=kbr@chromium.org
NOTRY=true
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Committed: https://crrev.com/9f2739b9a965955b8f4244bd8dd43f43718a4405
Cr-Commit-Position: refs/heads/master@{#414647}
==========

[commit-bot: I haz the power, 2016-08-26 03:59:22]

Patchset 3 (id:??) landed as
https://crrev.com/9f2739b9a965955b8f4244bd8dd43f43718a4405
Cr-Commit-Position: refs/heads/master@{#414647}