This reverts commit 806e06d1366b58878ced05cdd8d1d56394982fe6. Reason for revert: Breaks WebRTC roll to Chromium. https://chromium-review.googlesource.com/c/chromium/src/+/1375538 02:52:35.346 7748 [6936:11248:1213/025234.206:ERROR:mediaengine.cc(80)] Attempted to set RtpParameters with modified codecPayloadType (INVALID_MODIFICATION) Original change's description: > Implement read-only codecPayloadType in RtpParameters > > Bug: webrtc:7580 > Change-Id: I6d901afa97262b6c6d9fe6c7366df465ec77bfb3 > Reviewed-on: https://webrtc-review.googlesource.com/c/113944 > Reviewed-by: Sami Kalliomäki <sakal@webrtc.org> > Reviewed-by: Seth Hampson <shampson@webrtc.org> > Reviewed-by: Anders Carlsson <andersc@webrtc.org> > Reviewed-by: Steve Anton <steveanton@webrtc.org> > Commit-Queue: Florent Castelli <orphis@webrtc.org> > Cr-Commit-Position: refs/heads/master@{#25993} TBR=steveanton@webrtc.org,sakal@webrtc.org,andersc@webrtc.org,shampson@webrtc.org,orphis@webrtc.org Change-Id: I157f9a79ae7133395431891e15e2c053559d359b No-Presubmit: true No-Tree-Checks: true No-Try: true Bug: webrtc:7580 Reviewed-on: https://webrtc-review.googlesource.com/c/114300 Reviewed-by: Henrik Grunell <henrikg@webrtc.org> Commit-Queue: Henrik Grunell <henrikg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26000}