Fix closure compiler error.

Fix closure compiler error.

Fixes compile error caused by https://codereview.chromium.org/1425033006.
Although AudioPlayerElement's new property can be resolved by reading element's script directly,
I fixes this in old style (using extern) for now.

BUG=none
TBR=yawano@chromium.org

Committed: https://crrev.com/095f2d2efe7c765e0e35eb3077471e753a01c7cf
Cr-Commit-Position: refs/heads/master@{#357120}

[fukino, 2015-10-30 16:20:00]

Description was changed from

==========
Fix closure compiler error.

Fixes compile error caused by https://codereview.chromium.org/1425033006.
Although AudioPlayerElement's new property can be resolved by reading element's
script directly,
I fixes this in old style (using extern) for now.

BUG=none
==========

to

==========
Fix closure compiler error.

Fixes compile error caused by https://codereview.chromium.org/1425033006.
Although AudioPlayerElement's new property can be resolved by reading element's
script directly,
I fixes this in old style (using extern) for now.

BUG=none
TBR=yawano@chromium.org
==========

[fukino, 2015-10-30 16:20:00]

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

[fukino, 2015-10-30 16:20:10]

The CQ bit was checked by fukino@chromium.org

[commit-bot: I haz the power, 2015-10-30 16:21:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1428983002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1428983002/1

[commit-bot: I haz the power, 2015-10-30 16:34:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-30 16:35:24]

Patchset 1 (id:??) landed as
https://crrev.com/095f2d2efe7c765e0e35eb3077471e753a01c7cf
Cr-Commit-Position: refs/heads/master@{#357120}

[Dan Beam, 2015-10-30 20:56:42]

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

[Dan Beam, 2015-10-30 20:56:43]

we should be using the scripts directly instead of using externs.  that's why
jlklein@ created --polymer_pass (which we're already sending to the closure
compiler)

[fukino, 2015-10-30 23:24:28]

On 2015/10/30 20:56:43, Dan Beam wrote:
> we should be using the scripts directly instead of using externs.  that's why
> jlklein@ created --polymer_pass (which we're already sending to the closure
> compiler)

Yes, as described in the CL description, this is an old stye which was needed
before --polymer_pass.
I'll update them next week. Thanks!