Revert of Trace the stats report as JSON instead of each stat separately.

Revert of Trace the stats report as JSON instead of each stat separately. (patchset #3 id:100001 of https://codereview.webrtc.org/2986453002/ )

Reason for revert:
It breaks a downstream project.

Original issue's description:
> Trace the stats report as JSON instead of each stat separately.
> 
> Trace the whole report as a string instead of each field on it's own. And test that the traces collected are valid.
> 
> R=tommi@webrtc.org, hbos@webrtc.org
> BUG=chromium:653087
> 
> Review-Url: https://codereview.webrtc.org/2986453002
> Cr-Commit-Position: refs/heads/master@{#19341}
> Committed: https://chromium.googlesource.com/external/webrtc/+/80c65780e618f90369295fe5daf8075e9b374c26

TBR=hbos@webrtc.org,tommi@webrtc.org,ehmaldonado@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:653087
Review-Url: https://codereview.webrtc.org/3001683002
Cr-Commit-Position: refs/heads/master@{#19344}
Committed: https://chromium.googlesource.com/external/webrtc/+/3439c893585e0958502ef397056a372be1777688

[mbonadei, 2017-08-15 06:47:50]

The CQ bit was checked by mbonadei@webrtc.org

[mbonadei, 2017-08-15 06:47:50]

Created Revert of Trace the stats report as JSON instead of each stat
separately.

[commit-bot: I haz the power, 2017-08-15 06:47:59]

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, 2017-08-15 06:48:05]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1502779670291950, "parent_rev":
"a77e6bbd30276bdc5b30f2cbc1e92ca181ae76f0", "commit_rev":
"3439c893585e0958502ef397056a372be1777688"}

[commit-bot: I haz the power, 2017-08-15 06:48:11]

Description was changed from

==========
Revert of Trace the stats report as JSON instead of each stat separately.
(patchset #3 id:100001 of https://codereview.webrtc.org/2986453002/ )

Reason for revert:
It breaks a downstream project.

Original issue's description:
> Trace the stats report as JSON instead of each stat separately.
> 
> Trace the whole report as a string instead of each field on it's own. And test
that the traces collected are valid.
> 
> R=tommi@webrtc.org, hbos@webrtc.org
> BUG=chromium:653087
> 
> Review-Url: https://codereview.webrtc.org/2986453002
> Cr-Commit-Position: refs/heads/master@{#19341}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/80c65780e618f90369295fe5d...

TBR=hbos@webrtc.org,tommi@webrtc.org,ehmaldonado@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:653087
==========

to

==========
Revert of Trace the stats report as JSON instead of each stat separately.
(patchset #3 id:100001 of https://codereview.webrtc.org/2986453002/ )

Reason for revert:
It breaks a downstream project.

Original issue's description:
> Trace the stats report as JSON instead of each stat separately.
> 
> Trace the whole report as a string instead of each field on it's own. And test
that the traces collected are valid.
> 
> R=tommi@webrtc.org, hbos@webrtc.org
> BUG=chromium:653087
> 
> Review-Url: https://codereview.webrtc.org/2986453002
> Cr-Commit-Position: refs/heads/master@{#19341}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/80c65780e618f90369295fe5d...

TBR=hbos@webrtc.org,tommi@webrtc.org,ehmaldonado@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:653087

Review-Url: https://codereview.webrtc.org/3001683002
Cr-Commit-Position: refs/heads/master@{#19344}
Committed:
https://chromium.googlesource.com/external/webrtc/+/3439c893585e0958502ef3970...
==========

[commit-bot: I haz the power, 2017-08-15 06:48:12]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/3439c893585e0958502ef3970...

[ehmaldonado_webrtc, 2017-08-15 10:41:22]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.webrtc.org/3000943002/ by ehmaldonado@webrtc.org.

The reason for reverting is: Fixed.