Fix crash in ResolveLanguageListOnBlockingPool

Fix crash in ResolveLanguageListOnBlockingPool

Evalation order of arguments is undefined, which can result
in NULL pointers passed to ResolveLanguageListOnBlockingPool.

BUG=422002
TEST=build & run on link_freon

Committed: https://crrev.com/054258874a2cdd1118081beee16c10c746f04529
Cr-Commit-Position: refs/heads/master@{#299091}

[spang, 2014-10-09 19:30:02]

spang@chromium.org changed reviewers:
+ ygorshenin@chromium.org

[spang, 2014-10-09 19:35:14]

spang@chromium.org changed reviewers:
+ dzhioev@chromium.org, nkostylev@chromium.org

[Alexander Alekseev, 2014-10-09 19:36:46]

alemate@chromium.org changed reviewers:
+ alemate@chromium.org

[Alexander Alekseev, 2014-10-09 19:36:47]

lgtm

You're right.

[spang, 2014-10-09 19:36:56]

The CQ bit was checked by spang@chromium.org

[commit-bot: I haz the power, 2014-10-09 19:38:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/641693008/1

[commit-bot: I haz the power, 2014-10-09 19:49:29]

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

[commit-bot: I haz the power, 2014-10-09 19:49:30]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[Nikita (slow), 2014-10-10 11:29:13]

lgtm

[Nikita (slow), 2014-10-10 11:29:37]

The CQ bit was checked by nkostylev@chromium.org

[commit-bot: I haz the power, 2014-10-10 11:30:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/641693008/1

[commit-bot: I haz the power, 2014-10-10 11:34:07]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-10 11:34:57]

Patchset 1 (id:??) landed as
https://crrev.com/054258874a2cdd1118081beee16c10c746f04529
Cr-Commit-Position: refs/heads/master@{#299091}