Cast logging: Additional stats for getStats() API.

Cast logging: Additional stats for getStats() API.

Histograms in json format:
* capture time
* encode time
* packet latency
* frame latency
* playout delay

- Duration in ms
- first event unix time
- last event unix time

Also improved ReceiverTimeOffsetEstimatorImpl to re-estimate every 30 seconds to account for unknown amount of clock drift between sender and receiver.
BUG=403921
Committed: https://crrev.com/f44ecee406acecee0f5cea4b16bd0e395ffc0108
Cr-Commit-Position: refs/heads/master@{#291873}

[imcheng, 2014-08-22 01:27:35]

PTAL, thanks!

[Alpha Left Google, 2014-08-22 01:49:04]

Looks pretty good.

https://codereview.chromium.org/482383005/diff/1/media/cast/logging/stats_eve...
File media/cast/logging/stats_event_subscriber.cc (right):

https://codereview.chromium.org/482383005/diff/1/media/cast/logging/stats_eve...
media/cast/logging/stats_event_subscriber.cc:280:
STAT_ENUM_TO_STRING(DURATION_MS);
This seems redundant since we have first event time and last event time.

[imcheng, 2014-08-22 19:14:18]

https://codereview.chromium.org/482383005/diff/1/media/cast/logging/stats_eve...
File media/cast/logging/stats_event_subscriber.cc (right):

https://codereview.chromium.org/482383005/diff/1/media/cast/logging/stats_eve...
media/cast/logging/stats_event_subscriber.cc:280:
STAT_ENUM_TO_STRING(DURATION_MS);
On 2014/08/22 01:49:04, Alpha wrote:
> This seems redundant since we have first event time and last event time.

Removed.

[Alpha Left Google, 2014-08-25 22:06:07]

The CQ bit was checked by hclam@chromium.org

[Alpha Left Google, 2014-08-25 22:06:07]

lgtm

[commit-bot: I haz the power, 2014-08-25 22:07:24]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/imcheng@chromium.org/482383005/20001

[commit-bot: I haz the power, 2014-08-26 00:50:04]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_chromium_x64_rel_swarming on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[commit-bot: I haz the power, 2014-08-26 01:39:21]

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

[commit-bot: I haz the power, 2014-08-26 01:39:22]

Failed to commit the patch.

[imcheng, 2014-08-26 01:46:44]

The CQ bit was checked by imcheng@chromium.org

[commit-bot: I haz the power, 2014-08-26 01:48:28]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/imcheng@chromium.org/482383005/20001

[commit-bot: I haz the power, 2014-08-26 01:50:03]

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

[commit-bot: I haz the power, 2014-08-26 01:50:05]

Failed to commit the patch.

[imcheng, 2014-08-26 06:42:43]

The CQ bit was checked by imcheng@chromium.org

[commit-bot: I haz the power, 2014-08-26 06:43:45]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/imcheng@chromium.org/482383005/40001

[commit-bot: I haz the power, 2014-08-26 07:42:16]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  mac_chromium_rel_swarming on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[commit-bot: I haz the power, 2014-08-26 09:12:44]

Committed patchset #3 (40001) as 91ab56fe7a369333cd5569e57c59342c47d4172d

[commit-bot: I haz the power, 2014-09-10 02:41:40]

Patchset 3 (id:??) landed as
https://crrev.com/f44ecee406acecee0f5cea4b16bd0e395ffc0108
Cr-Commit-Position: refs/heads/master@{#291873}