Work toward enabling WebRTC in the GN build.

Work toward enabling WebRTC in the GN build.

With some changes in libvpx and webrtc, plus this change, we should be able to enable webrtc in the GN build.

R=hclam@chromium.org

Committed: https://crrev.com/1b23fbf36010d43c26541452335f746eeab18bfd
Cr-Commit-Position: refs/heads/master@{#295784}

[brettw, 2014-09-19 20:39:38]

brettw@chromium.org changed reviewers:
+ hclam@chromium.org

[Alpha Left Google, 2014-09-19 20:40:24]

lgtm

[brettw, 2014-09-19 20:52:01]

The CQ bit was checked by brettw@chromium.org

[commit-bot: I haz the power, 2014-09-19 20:53:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/583353002/20001

[commit-bot: I haz the power, 2014-09-19 21:10:49]

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

[commit-bot: I haz the power, 2014-09-19 21:10:50]

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

[brettw, 2014-09-19 21:30:28]

Committed patchset #2 (id:20001) manually as 1b23fbf.

[commit-bot: I haz the power, 2014-09-19 21:30:33]

Patchset 2 (id:??) landed as
https://crrev.com/1b23fbf36010d43c26541452335f746eeab18bfd
Cr-Commit-Position: refs/heads/master@{#295784}