This is a reland of 2b9fa09fa3e3379fd8e76490c394f25670352ef2. It got reverted because I forgot to whitelist the new metrics in chromium, which has now been done: https://chromium-review.googlesource.com/c/chromium/src/+/1760209 Relanding requires no changes to the CL. Original change's description: > [GetStats] Expose video codec implementation in standardized metrics. > > Spec issue: https://github.com/w3c/webrtc-stats/issues/445 > Spec PR: https://github.com/w3c/webrtc-stats/pull/473 > > Now that the spec's RTCCodecStats.implementation has moved to > RTCOutboundRtpStreamStats.encoderImplementation and > RTCInboundRtpStreamStats.decoderImplementation, this CL implements them > using the same string that the legacy getStats() API used. > > Bug: webrtc:10890 > Change-Id: Ic43ce44735453626791959df3061ee253356015a > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/149168 > Commit-Queue: Henrik Boström <hbos@webrtc.org> > Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> > Cr-Commit-Position: refs/heads/master@{#28877} TBR=ilnik@webrtc.org Bug: webrtc:10890 Change-Id: Ib874b608856c2795b1ca08f6af43c61dd859ea21 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/149800 Reviewed-by: Henrik Boström <hbos@webrtc.org> Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Commit-Queue: Henrik Boström <hbos@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28887}