VP9: Enable multi-threading for SVC.

VP9: Enable multi-threading for SVC.

This was disabled due to issues with multi-threading
and spatial layers, but have since been fixed.

R=stefan@webrtc.org
TBR=mflodman@webrtc.org, stefan@webrtc.org
BUG=

Committed: https://crrev.com/e7f6b565e49702ebf49168f1a38fc4a22b12df9b
Cr-Commit-Position: refs/heads/master@{#10229}

[marpan, 2015-10-08 18:18:29]

The CQ bit was checked by marpan@google.com

[commit-bot: I haz the power, 2015-10-08 18:18:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1390353003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1390353003/1

[commit-bot: I haz the power, 2015-10-08 18:18:47]

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

[commit-bot: I haz the power, 2015-10-08 18:18:48]

No L-G-T-M from a valid reviewer yet. Only full committers are accepted.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[stefan-webrtc, 2015-10-08 18:28:04]

lgtm

[marpan, 2015-10-08 18:36:38]

The CQ bit was checked by marpan@google.com

[commit-bot: I haz the power, 2015-10-08 18:36:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1390353003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1390353003/1

[commit-bot: I haz the power, 2015-10-08 19:58:14]

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

[commit-bot: I haz the power, 2015-10-08 19:58:15]

Try jobs failed on following builders:
  android_rel on tryserver.webrtc (JOB_TIMED_OUT, no build URL)

[marpan, 2015-10-08 20:57:21]

Committed patchset #1 (id:1) manually as
e7f6b565e49702ebf49168f1a38fc4a22b12df9b (presubmit successful).

[commit-bot: I haz the power, 2015-10-08 20:57:26]

Patchset 1 (id:??) landed as
https://crrev.com/e7f6b565e49702ebf49168f1a38fc4a22b12df9b
Cr-Commit-Position: refs/heads/master@{#10229}