Remove use of DescheduleUntilFinished from WebGL.

Remove use of DescheduleUntilFinished from WebGL.

It's no longer necessary, since the new implementation of
ImageTransportSurfaceOverlayMac::ClientWait correctly waits for the WebGL
context's work to finish.

BUG=617249
Committed: https://crrev.com/5bcbf89d9ccff7e123c0b195e26f0901b7e65eff
Cr-Commit-Position: refs/heads/master@{#399622}

[erikchen, 2016-06-13 17:18:52]

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

[commit-bot: I haz the power, 2016-06-13 17:19:13]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2062813003/1

[erikchen, 2016-06-13 17:19:25]

erikchen@chromium.org changed reviewers:
+ kbr@chromium.org

[erikchen, 2016-06-13 17:19:25]

kbr: Please review.

[Ken Russell (switch to Gerrit), 2016-06-13 18:17:53]

lgtm

[erikchen, 2016-06-13 21:25:11]

The CQ bit was unchecked by erikchen@chromium.org

[erikchen, 2016-06-13 21:25:19]

The CQ bit was checked by erikchen@chromium.org

[commit-bot: I haz the power, 2016-06-13 21:26:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2062813003/1

[commit-bot: I haz the power, 2016-06-13 23:17:45]

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

[commit-bot: I haz the power, 2016-06-13 23:17:46]

Try jobs failed on following builders:
  win_chromium_rel_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[erikchen, 2016-06-13 23:27:00]

The CQ bit was checked by erikchen@chromium.org

[commit-bot: I haz the power, 2016-06-13 23:27:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2062813003/1

[commit-bot: I haz the power, 2016-06-14 00:37:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-14 00:40:21]

Description was changed from

==========
Remove use of DescheduleUntilFinished from WebGL.

It's no longer necessary, since the new implementation of
ImageTransportSurfaceOverlayMac::ClientWait correctly waits for the WebGL
context's work to finish.

BUG=617249
==========

to

==========
Remove use of DescheduleUntilFinished from WebGL.

It's no longer necessary, since the new implementation of
ImageTransportSurfaceOverlayMac::ClientWait correctly waits for the WebGL
context's work to finish.

BUG=617249

Committed: https://crrev.com/5bcbf89d9ccff7e123c0b195e26f0901b7e65eff
Cr-Commit-Position: refs/heads/master@{#399622}
==========

[commit-bot: I haz the power, 2016-06-14 00:40:23]

Patchset 1 (id:??) landed as
https://crrev.com/5bcbf89d9ccff7e123c0b195e26f0901b7e65eff
Cr-Commit-Position: refs/heads/master@{#399622}