Switch VP9 lossy to CBR encoding.

Switch VP9 lossy to CBR encoding.

CBR is required for cyclic refresh.

BUG=134202
Committed: https://crrev.com/d194235c54b414571f6fbdedf47b00592fbfc690
Cr-Commit-Position: refs/heads/master@{#326881}

[aconverse, 2015-04-16 22:16:51]

aconverse@chromium.org changed reviewers:
+ wez@chromium.org

[Wez, 2015-04-17 23:57:44]

FYI, you need to "Publish+Mail Comments" for an email to get sent to notify
reviewers of the CL!

[Wez, 2015-04-18 00:00:23]

https://codereview.chromium.org/1079593004/diff/1/remoting/codec/video_encode...
File remoting/codec/video_encoder_vpx.cc (right):

https://codereview.chromium.org/1079593004/diff/1/remoting/codec/video_encode...
remoting/codec/video_encoder_vpx.cc:104: config->rc_target_bitrate = 500;
nit: Please add a comment to indicate that we are hard-coding to 500Kbps in the
absence of access to a good bandwidth estimator.

Suggest also setting the rc_end_usage explicitly to variable bit-rate in the
lossless case, for clarity.

[aconverse, 2015-04-20 17:12:27]

https://codereview.chromium.org/1079593004/diff/1/remoting/codec/video_encode...
File remoting/codec/video_encoder_vpx.cc (right):

https://codereview.chromium.org/1079593004/diff/1/remoting/codec/video_encode...
remoting/codec/video_encoder_vpx.cc:104: config->rc_target_bitrate = 500;
On 2015/04/18 00:00:23, Wez wrote:
> nit: Please add a comment to indicate that we are hard-coding to 500Kbps in
the
> absence of access to a good bandwidth estimator.
> 
> Suggest also setting the rc_end_usage explicitly to variable bit-rate in the
> lossless case, for clarity.

Done.

[Wez, 2015-04-21 01:30:35]

lgtm

[Wez, 2015-04-21 01:31:14]

Please set BUG=134202 in CL description.

Let me know if you need me to CQ this - I _think_ you can just tick the box
yourself, though. :)

[aconverse, 2015-04-24 19:49:37]

The CQ bit was checked by aconverse@chromium.org

[commit-bot: I haz the power, 2015-04-24 19:50:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1079593004/20001

[commit-bot: I haz the power, 2015-04-24 21:38:57]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-04-24 21:39:52]

Patchset 2 (id:??) landed as
https://crrev.com/d194235c54b414571f6fbdedf47b00592fbfc690
Cr-Commit-Position: refs/heads/master@{#326881}