Mark JSArrayBuffer::SetupAllocatingData with WARN_UNUSED_RESULT.

Mark JSArrayBuffer::SetupAllocatingData with WARN_UNUSED_RESULT.

Also update a call in cctest to check the result.

BUG=chromium:681843
Review-Url: https://codereview.chromium.org/2647573003
Cr-Commit-Position: refs/heads/master@{#42513}
Committed: https://chromium.googlesource.com/v8/v8/+/ba2cd16986182ee80973f116ac277b93b7b285bf

[jbroman, 2017-01-19 15:47:51]

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

[commit-bot: I haz the power, 2017-01-19 15:47:56]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[jbroman, 2017-01-19 15:58:28]

jbroman@chromium.org changed reviewers:
+ jkummerow@chromium.org

[Jakob Kummerow, 2017-01-19 16:02:29]

LGTM, thanks!

[jbroman, 2017-01-19 16:20:49]

The CQ bit was unchecked by jbroman@chromium.org

[jbroman, 2017-01-19 16:20:50]

The CQ bit was checked by jbroman@chromium.org

[commit-bot: I haz the power, 2017-01-19 16:20:57]

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, 2017-01-19 16:23:08]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1484842850104000, "parent_rev":
"7739affa5b57e0d28674d476f63de60d71728fb6", "commit_rev":
"ba2cd16986182ee80973f116ac277b93b7b285bf"}

[commit-bot: I haz the power, 2017-01-19 16:23:12]

Description was changed from

==========
Mark JSArrayBuffer::SetupAllocatingData with WARN_UNUSED_RESULT.

Also update a call in cctest to check the result.

BUG=chromium:681843
==========

to

==========
Mark JSArrayBuffer::SetupAllocatingData with WARN_UNUSED_RESULT.

Also update a call in cctest to check the result.

BUG=chromium:681843

Review-Url: https://codereview.chromium.org/2647573003
Cr-Commit-Position: refs/heads/master@{#42513}
Committed:
https://chromium.googlesource.com/v8/v8/+/ba2cd16986182ee80973f116ac277b93b7b...
==========

[commit-bot: I haz the power, 2017-01-19 16:23:13]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/ba2cd16986182ee80973f116ac277b93b7b...