Change of the format of the log output in the level controller

The current format of the log output of the level controller differs from the rest of the log. Furthermore, it is hard to automatically parse. This CL changes the format to be a JSON-type format which does not have those issues.

BUG=webrtc:6408
Committed: https://crrev.com/8a9b0f8e02c7539cf21c3de174dad0f8e2becc06
Cr-Commit-Position: refs/heads/master@{#14489}

[peah-webrtc, 2016-09-22 07:52:30]

Description was changed from

==========
This CL changes the format of the log output in the level controller

The current format of the log output of the level controller differs from the
rest of the log. Furthermore, it is hard to automatically parse. This CL changes
the format to be a JSON-type format which does not have those issues.

BUG=webrtc:6408
==========

to

==========
The current format of the log output of the level controller differs from the
rest of the log. Furthermore, it is hard to automatically parse. This CL changes
the format to be a JSON-type format which does not have those issues.

BUG=webrtc:6408
==========

[peah-webrtc, 2016-09-22 07:52:58]

peah@webrtc.org changed reviewers:
+ solenberg@webrtc.org

[the sun, 2016-09-23 12:31:33]

lgtm

https://codereview.webrtc.org/2364553003/diff/1/webrtc/modules/audio_processi...
File webrtc/modules/audio_processing/level_controller/level_controller.cc
(right):

https://codereview.webrtc.org/2364553003/diff/1/webrtc/modules/audio_processi...
webrtc/modules/audio_processing/level_controller/level_controller.cc:159:
LOG(LS_INFO) << "Level Controller metrics: {"
Consider putting this in a ToString() method, like you did for the Config struct
(would use field names then, rather than plain text, btw).

[peah-webrtc, 2016-10-03 10:36:58]

The CQ bit was checked by peah@webrtc.org

[peah-webrtc, 2016-10-03 10:37:03]

https://codereview.webrtc.org/2364553003/diff/1/webrtc/modules/audio_processi...
File webrtc/modules/audio_processing/level_controller/level_controller.cc
(right):

https://codereview.webrtc.org/2364553003/diff/1/webrtc/modules/audio_processi...
webrtc/modules/audio_processing/level_controller/level_controller.cc:159:
LOG(LS_INFO) << "Level Controller metrics: {"
On 2016/09/23 12:31:33, the sun wrote:
> Consider putting this in a ToString() method, like you did for the Config
struct
> (would use field names then, rather than plain text, btw).

I agree, but in this case not all the reported metrics are stored as fields as
they are handled before being reported. 

I'll land this CL as it is, but I'd be happy to to change this later.

[commit-bot: I haz the power, 2016-10-03 10:37:09]

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, 2016-10-03 10:56:33]

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

[commit-bot: I haz the power, 2016-10-03 10:56:38]

Try jobs failed on following builders:
  linux_tsan2 on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/linux_tsan2/builds/15730)

[peah-webrtc, 2016-10-04 06:15:43]

The CQ bit was checked by peah@webrtc.org

[commit-bot: I haz the power, 2016-10-04 06:15:53]

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, 2016-10-04 07:06:06]

Description was changed from

==========
The current format of the log output of the level controller differs from the
rest of the log. Furthermore, it is hard to automatically parse. This CL changes
the format to be a JSON-type format which does not have those issues.

BUG=webrtc:6408
==========

to

==========
The current format of the log output of the level controller differs from the
rest of the log. Furthermore, it is hard to automatically parse. This CL changes
the format to be a JSON-type format which does not have those issues.

BUG=webrtc:6408
==========

[commit-bot: I haz the power, 2016-10-04 07:06:07]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-04 07:06:11]

Description was changed from

==========
The current format of the log output of the level controller differs from the
rest of the log. Furthermore, it is hard to automatically parse. This CL changes
the format to be a JSON-type format which does not have those issues.

BUG=webrtc:6408
==========

to

==========
The current format of the log output of the level controller differs from the
rest of the log. Furthermore, it is hard to automatically parse. This CL changes
the format to be a JSON-type format which does not have those issues.

BUG=webrtc:6408

Committed: https://crrev.com/8a9b0f8e02c7539cf21c3de174dad0f8e2becc06
Cr-Commit-Position: refs/heads/master@{#14489}
==========

[commit-bot: I haz the power, 2016-10-04 07:06:13]

Patchset 1 (id:??) landed as
https://crrev.com/8a9b0f8e02c7539cf21c3de174dad0f8e2becc06
Cr-Commit-Position: refs/heads/master@{#14489}