Fix typo in policy description

Fix typo in policy description

This CL fixes a typo in a policy description found by our translators.

BUG=None
TEST=None

Committed: https://crrev.com/238710d1e55e1eadb70561ead6702a5192ac7df1
Cr-Commit-Position: refs/heads/master@{#354489}

[bartfab (slow), 2015-10-16 08:53:47]

bartfab@chromium.org changed reviewers:
+ tnagel@chromium.org

[bartfab (slow), 2015-10-16 08:53:48]

Hi Thiemo,

Could you take a look please?

[Thiemo Nagel, 2015-10-16 09:06:37]

LGTM

[Thiemo Nagel, 2015-10-16 09:06:40]

The CQ bit was checked by tnagel@chromium.org

[commit-bot: I haz the power, 2015-10-16 09:06:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1405963003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1405963003/1

[commit-bot: I haz the power, 2015-10-16 10:40:01]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-16 10:41:22]

Patchset 1 (id:??) landed as
https://crrev.com/238710d1e55e1eadb70561ead6702a5192ac7df1
Cr-Commit-Position: refs/heads/master@{#354489}