Fix a closure compiler error which is introduced in 968793002.

Fix a closure compiler error which is introduced in 968793002.

BUG=462521
TEST=GYP_GENERATORS=ninja tools/gyp/gyp --depth . ui/file_manager/file_manager/foreground/js/metadata/compiled_resources.gyp && ninja -C out/Default

Committed: https://crrev.com/2a44c5999333e731e0ce69057c3017279bd4a1b4
Cr-Commit-Position: refs/heads/master@{#318661}

[yawano, 2015-03-02 07:16:27]

yawano@chromium.org changed reviewers:
+ hirono@chromium.org

[yawano, 2015-03-02 07:16:28]

The previous CL (http://crrev.com/968793002) broke closure compiler build bot.
PTAL. Thank you!

[hirono, 2015-03-02 07:21:01]

lgtm!

[yawano, 2015-03-02 07:22:30]

On 2015/03/02 07:21:01, hirono wrote:
> lgtm!

Thank you!

[yawano, 2015-03-02 07:22:33]

The CQ bit was checked by yawano@chromium.org

[commit-bot: I haz the power, 2015-03-02 07:23:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/964343002/1

[commit-bot: I haz the power, 2015-03-02 07:55:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-02 07:55:33]

Patchset 1 (id:??) landed as
https://crrev.com/2a44c5999333e731e0ce69057c3017279bd4a1b4
Cr-Commit-Position: refs/heads/master@{#318661}