[screen-orientation] Add missing returns after sending error notification.

[screen-orientation] Add missing returns after sending error notification.

The issue was found and fixed by jonross@ in
https://codereview.chromium.org/648733003/.

I moved it away from his CL because he is OOO and it would be better to
get this fixed sooner than later.

BUG=162827
Committed: https://crrev.com/740d4ba9b72ce129013758a6831ee6ed744ca076
Cr-Commit-Position: refs/heads/master@{#299699}

[mlamouri (slow - plz ping), 2014-10-15 15:50:38]

mlamouri@chromium.org changed reviewers:
+ creis@chromium.org

[Charlie Reis, 2014-10-15 15:59:17]

Thanks, LGTM.

[mlamouri (slow - plz ping), 2014-10-15 16:06:24]

The CQ bit was checked by mlamouri@chromium.org

[commit-bot: I haz the power, 2014-10-15 16:07:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/655273003/1

[commit-bot: I haz the power, 2014-10-15 17:04:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-15 17:05:31]

Patchset 1 (id:??) landed as
https://crrev.com/740d4ba9b72ce129013758a6831ee6ed744ca076
Cr-Commit-Position: refs/heads/master@{#299699}