Fix compilation error.

Fix compilation error.

BUG=

TBR=gunsch, lcwu1

Committed: https://crrev.com/a3ba90b46f95361278a969a0c82492000dad6c3b
Cr-Commit-Position: refs/heads/master@{#307126}

[byungchul, 2014-12-05 22:56:24]

byungchul@chromium.org changed reviewers:
+ gunsch@chromium.org, lcwu@chromium.org

[byungchul, 2014-12-05 22:58:44]

The CQ bit was checked by byungchul@chromium.org

[commit-bot: I haz the power, 2014-12-05 22:59:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/785663002/1

[commit-bot: I haz the power, 2014-12-05 22:59:45]

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

[commit-bot: I haz the power, 2014-12-05 22:59:46]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[lcwu1, 2014-12-05 23:11:08]

lgtm

[lcwu1, 2014-12-05 23:11:16]

The CQ bit was checked by lcwu@chromium.org

[commit-bot: I haz the power, 2014-12-05 23:12:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/785663002/1

[commit-bot: I haz the power, 2014-12-06 00:46:04]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-06 00:48:29]

Patchset 1 (id:??) landed as
https://crrev.com/a3ba90b46f95361278a969a0c82492000dad6c3b
Cr-Commit-Position: refs/heads/master@{#307126}