Fix Chrome component build.

This fixes a component build breakage introduced by the latest WebRtc roll to r7234.
The missing symbol on linux was: _ZN6webrtc18videocapturemodule16VideoCaptureImpl6CreateEiPKc

TBR=sergeyu@chromium.org

Committed: https://crrev.com/dd449e72e25d814f1915ff0dea337d9f733aabef
Cr-Commit-Position: refs/heads/master@{#295698}

[perkj_chrome, 2014-09-19 12:44:09]

perkj@chromium.org changed reviewers:
+ tommi@chromium.org

[perkj_chrome, 2014-09-19 12:44:09]

Please?

[tommi (sloooow) - chröme, 2014-09-19 12:45:40]

lgtm

[perkj_chrome, 2014-09-19 12:48:45]

The CQ bit was checked by perkj@chromium.org

[commit-bot: I haz the power, 2014-09-19 12:49:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/584623003/1

[commit-bot: I haz the power, 2014-09-19 12:58:15]

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

[commit-bot: I haz the power, 2014-09-19 12:58:16]

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

[perkj_chrome, 2014-09-19 13:14:52]

The CQ bit was checked by perkj@chromium.org

[commit-bot: I haz the power, 2014-09-19 13:15:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/584623003/1

[commit-bot: I haz the power, 2014-09-19 13:48:37]

Committed patchset #1 (id:1) as 8feb8f246614a6d116308cbc437bda68fcba6edc

[commit-bot: I haz the power, 2014-09-19 13:49:11]

Patchset 1 (id:??) landed as
https://crrev.com/dd449e72e25d814f1915ff0dea337d9f733aabef
Cr-Commit-Position: refs/heads/master@{#295698}