Mac: Don't CHECK that AcquireIOSurface succeeds

Mac: Don't CHECK that AcquireIOSurface succeeds

This became the top renderer crasher. Allow the call to return failure.

BUG=532149
Committed: https://crrev.com/7334a8be2b4e2c0b7b6b2732af490159e6dc480b
Cr-Commit-Position: refs/heads/master@{#349963}

[ccameron, 2015-09-21 05:17:34]

ccameron@chromium.org changed reviewers:
+ reveman@chromium.org

[reveman, 2015-09-21 15:29:35]

lgtm

[ccameron, 2015-09-21 17:02:41]

Adding avi@ as OWNER

[ccameron, 2015-09-21 17:02:59]

ccameron@chromium.org changed reviewers:
+ avi@chromium.org

[ccameron, 2015-09-21 17:03:00]

Adding avi@ as OWNER

[Avi (use Gerrit), 2015-09-21 17:32:29]

lgtm

[ccameron, 2015-09-21 17:33:17]

Thanks!

[ccameron, 2015-09-21 17:33:25]

The CQ bit was checked by ccameron@chromium.org

[commit-bot: I haz the power, 2015-09-21 17:33:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1352913003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1352913003/1

[commit-bot: I haz the power, 2015-09-21 18:01:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-21 18:01:54]

Patchset 1 (id:??) landed as
https://crrev.com/7334a8be2b4e2c0b7b6b2732af490159e6dc480b
Cr-Commit-Position: refs/heads/master@{#349963}