Explicitly use RTX for RED in VideoQualityTest and video_loopback.

Explicitly use RTX for RED in VideoQualityTest and video_loopback.

After the removal of the RED/RTX workaround, we now need to explicitly
enable RTX for RED. Prior to the removal of the workaround, RED over RTX
was implicitly enabled whenever media over RTX was enabled.

BUG=webrtc:6650
Committed: https://crrev.com/8e75a523c8cecc71ba576c76e29b3ed8c039f8ed
Cr-Commit-Position: refs/heads/master@{#15061}

[brandtr, 2016-11-10 08:24:49]

brandtr@webrtc.org changed reviewers:
+ stefan@webrtc.org

[brandtr, 2016-11-10 08:24:49]

This was the reason that the video_loopback performance was
worse than the Chrome performance, after removing the RED/RTX workaround.

[brandtr, 2016-11-10 09:04:46]

Rebase

[stefan-webrtc, 2016-11-14 10:32:35]

lgtm

[brandtr, 2016-11-14 11:29:52]

The CQ bit was checked by brandtr@webrtc.org

[commit-bot: I haz the power, 2016-11-14 11:29:55]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2016-11-14 12:07:26]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-11-14 12:07:34]

Description was changed from

==========
Explicitly use RTX for RED in VideoQualityTest and video_loopback.

After the removal of the RED/RTX workaround, we now need to explicitly
enable RTX for RED. Prior to the removal of the workaround, RED over RTX
was implicitly enabled whenever media over RTX was enabled.

BUG=webrtc:6650
==========

to

==========
Explicitly use RTX for RED in VideoQualityTest and video_loopback.

After the removal of the RED/RTX workaround, we now need to explicitly
enable RTX for RED. Prior to the removal of the workaround, RED over RTX
was implicitly enabled whenever media over RTX was enabled.

BUG=webrtc:6650

Committed: https://crrev.com/8e75a523c8cecc71ba576c76e29b3ed8c039f8ed
Cr-Commit-Position: refs/heads/master@{#15061}
==========

[commit-bot: I haz the power, 2016-11-14 12:07:35]

Patchset 2 (id:??) landed as
https://crrev.com/8e75a523c8cecc71ba576c76e29b3ed8c039f8ed
Cr-Commit-Position: refs/heads/master@{#15061}