Throw when attaching a stack trace to an object fails.

Throw when attaching a stack trace to an object fails.

R=jarin@chromium.org
BUG=chromium:478011
LOG=N

Committed: https://crrev.com/8cf289ca4fcfb10c15d1840706f89a3636456f7e
Cr-Commit-Position: refs/heads/master@{#27941}

[Yang, 2015-04-20 13:22:40]

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

[commit-bot: I haz the power, 2015-04-20 13:23:04]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1077153003/1

[Jarin, 2015-04-20 13:25:04]

lgtm

[Yang, 2015-04-20 13:34:24]

The CQ bit was checked by yangguo@chromium.org

[Yang, 2015-04-20 13:34:24]

The CQ bit was unchecked by yangguo@chromium.org

[Yang, 2015-04-20 13:34:28]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2015-04-20 13:34:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1077153003/1

[commit-bot: I haz the power, 2015-04-20 13:56:19]

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

[commit-bot: I haz the power, 2015-04-20 13:56:20]

Try jobs failed on following builders:
  v8_presubmit on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_presubmit/builds/2137)

[Yang, 2015-04-20 14:20:23]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2015-04-20 14:20:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1077153003/1

[commit-bot: I haz the power, 2015-04-20 14:41:05]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-20 14:41:14]

Patchset 1 (id:??) landed as
https://crrev.com/8cf289ca4fcfb10c15d1840706f89a3636456f7e
Cr-Commit-Position: refs/heads/master@{#27941}