Correcting and splitting up WebRTC metrics by unit.

Correcting and splitting up WebRTC metrics by unit.

The perf dashboard can only display one unit (e.g. ms, bit/s, etc) per
graph, so this patch splits the metrics into reasonable buckets. I
deliberately didn't name them like the old buckets in order to reduce
confusion (e.g. audio_send, video_recv, and so on).

Also it turns out I had mixed up video_recv and video_send, so this
patch corrects that.

Another benefit is that we won't see huge values (bytes_received) with
small values (num_firs_recv), which makes the graphs easier to read.

R=kjellander@chromium.org,xians@chromium.org
BUG=357525
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=266031

[phoglund_chromium, 2014-04-24 10:04:15]

kjellander: main review
xians: owner stamp

[no longer working on chromium, 2014-04-24 10:51:29]

On 2014/04/24 10:04:15, phoglund wrote:
> kjellander: main review
> xians: owner stamp

owner stamp lgtm

[kjellander_chromium, 2014-04-24 14:14:01]

On 2014/04/24 10:51:29, xians1 wrote:
> On 2014/04/24 10:04:15, phoglund wrote:
> > kjellander: main review
> > xians: owner stamp
> 
> owner stamp lgtm

After offline discussion about the correcting of bytes->bits for
bwe_stats->available_send_bw and bwe_stats->available_recv_bw this lgtm.
I also understand the function renaming is fixing the fact that the old
functions reported the opposite of what their name implied.

[phoglund_chromium, 2014-04-24 14:14:23]

The CQ bit was checked by phoglund@chromium.org

[commit-bot: I haz the power, 2014-04-24 14:17:06]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/phoglund@chromium.org/252513002/1

[commit-bot: I haz the power, 2014-04-24 16:15:25]

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

[commit-bot: I haz the power, 2014-04-24 16:15:25]

Try jobs failed on following builders:
  tryserver.chromium on linux_chromium_rel

[phoglund_chromium, 2014-04-24 18:53:11]

The CQ bit was checked by phoglund@chromium.org

[commit-bot: I haz the power, 2014-04-24 21:10:20]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/phoglund@chromium.org/252513002/1

[commit-bot: I haz the power, 2014-04-24 23:15:31]

Change committed as 266031