The following revision refers to this bug:
  https://chromium.googlesource.com/external/webrtc.git/+/a65704b5c905c97970f28eb3d1df7369a700efdf

commit a65704b5c905c97970f28eb3d1df7369a700efdf
Author: hbos <hbos@webrtc.org>
Date: Mon Nov 14 10:28:16 2016

Expose RtpCodecParameters to VideoMediaInfo stats.

Payload type -> RtpCodecParameters maps added for sender and receiver
side. It contains information that will be needed for RTCCodecStats[1]
dictionaries.

Video[Sender/Receiver]Info is updated with current codec payload type
for every stream which can be used to look up the codec in
VideoMediaInfo.

A similar change should be made for VoiceMediaInfo and
Voice[Sender/Receiver]Info.

[1] https://w3c.github.io/webrtc-stats/#codec-dict*

BUG= chromium:659117 

Review-Url: https://codereview.webrtc.org/2484193002
Cr-Commit-Position: refs/heads/master@{#15060}

[modify] https://crrev.com/a65704b5c905c97970f28eb3d1df7369a700efdf/webrtc/media/base/mediachannel.h
[modify] https://crrev.com/a65704b5c905c97970f28eb3d1df7369a700efdf/webrtc/media/base/videoengine_unittest.h
[modify] https://crrev.com/a65704b5c905c97970f28eb3d1df7369a700efdf/webrtc/media/engine/webrtcvideoengine2.cc
[modify] https://crrev.com/a65704b5c905c97970f28eb3d1df7369a700efdf/webrtc/media/engine/webrtcvideoengine2.h

The following revision refers to this bug:
  https://chromium.googlesource.com/external/webrtc.git/+/1acfbd22cc30bc72af53187f25f3c389792968d3

commit 1acfbd22cc30bc72af53187f25f3c389792968d3
Author: hbos <hbos@webrtc.org>
Date: Fri Nov 18 07:43:29 2016

Expose RtpCodecParameters to VoiceMediaInfo stats.

Payload type -> RtpCodecParameters maps added for sender and receiver.
This is a follow-up to https://codereview.webrtc.org/2484193002/ which
did the same thing for VideoMediaInfo. This information will be used to
produce RTCCodecStats[1].

Voice[Sender/Receiver]Info is updated with current codec payload type
for every stream which can be used to look up the codec in
VoiceMediaInfo.

[1] https://w3c.github.io/webrtc-stats/#codec-dict*

BUG= chromium:659117 

Review-Url: https://codereview.webrtc.org/2503383002
Cr-Commit-Position: refs/heads/master@{#15144}

[modify] https://crrev.com/1acfbd22cc30bc72af53187f25f3c389792968d3/webrtc/api/call/audio_receive_stream.h
[modify] https://crrev.com/1acfbd22cc30bc72af53187f25f3c389792968d3/webrtc/api/call/audio_send_stream.cc
[modify] https://crrev.com/1acfbd22cc30bc72af53187f25f3c389792968d3/webrtc/api/call/audio_send_stream.h
[modify] https://crrev.com/1acfbd22cc30bc72af53187f25f3c389792968d3/webrtc/audio/audio_receive_stream.cc
[modify] https://crrev.com/1acfbd22cc30bc72af53187f25f3c389792968d3/webrtc/audio/audio_send_stream.cc
[modify] https://crrev.com/1acfbd22cc30bc72af53187f25f3c389792968d3/webrtc/media/base/mediachannel.h
[modify] https://crrev.com/1acfbd22cc30bc72af53187f25f3c389792968d3/webrtc/media/engine/webrtcvideoengine2.cc
[modify] https://crrev.com/1acfbd22cc30bc72af53187f25f3c389792968d3/webrtc/media/engine/webrtcvoiceengine.cc
[modify] https://crrev.com/1acfbd22cc30bc72af53187f25f3c389792968d3/webrtc/media/engine/webrtcvoiceengine_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/external/webrtc.git/+/0adb8285b101ee7e8a8e1b03200018449f606d6a

commit 0adb8285b101ee7e8a8e1b03200018449f606d6a
Author: hbos <hbos@webrtc.org>
Date: Wed Nov 23 10:32:06 2016

RTCCodecStats[1] added.

RTCStatsCollector supports "payloadType", "codec" and "clockRate".
"channels", "parameters" and "implementation" need to be supported
before closing  crbug.com/659117 .

[1] https://w3c.github.io/webrtc-stats/#codec-dict*

BUG= chromium:659117 ,  chromium:627816 ,  chromium:657854 
NOTRY=True

Review-Url: https://codereview.webrtc.org/2509803004
Cr-Commit-Position: refs/heads/master@{#15207}

[modify] https://crrev.com/0adb8285b101ee7e8a8e1b03200018449f606d6a/webrtc/api/rtcstatscollector.cc
[modify] https://crrev.com/0adb8285b101ee7e8a8e1b03200018449f606d6a/webrtc/api/rtcstatscollector.h
[modify] https://crrev.com/0adb8285b101ee7e8a8e1b03200018449f606d6a/webrtc/api/rtcstatscollector_unittest.cc
[modify] https://crrev.com/0adb8285b101ee7e8a8e1b03200018449f606d6a/webrtc/api/stats/rtcstats_objects.h
[modify] https://crrev.com/0adb8285b101ee7e8a8e1b03200018449f606d6a/webrtc/stats/rtcstats_objects.cc

Bumping this to M58. Please correct if that's wrong.

This stats dictionary is partially supported (see landed CLs in this thread).
To better track what's left, a webrtc bug has been created to track the remaining work related to this dictionary - merging into that one.