This reverts commit 1550292efe680ac79a18004705c908b1cdca54cb. Reason for revert: webkit_layout_tests:fast/peerconnection/RTCPeerConnection-sdpSemantics.html is broken, see below. WebRTC roll isn't going through because of it. This CL looks the most suspicious within the 5 in the range. https://chromium-review.googlesource.com/c/chromium/src/+/981899 https://webrtc.googlesource.com/src.git/+log/bb50ce5bb6d5..27f3bf512827 https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux_chromium_rel_ng/54616 Original change's description: > Adds support for multiple or no media stream ids. > > With Unified Plan SDP semantics, this adds support for specifying > either no media stream ids or multiple media stream ids for a > transceiver/sender/receiver. This includes serializing/deserializing > SDPs with multiple a=msid lines in a m section, or an "a=msid:- > <appdata>" line to indicate the no stream case. Note that this does > not synchronize between multiple streams, this is still just supported > based upon the first media stream id. > > Bug: webrtc:7932, webrtc:7933 > Change-Id: Ib7433929af7b2925abe2824b485b360cec12f275 > Reviewed-on: https://webrtc-review.googlesource.com/61341 > Commit-Queue: Seth Hampson <shampson@webrtc.org> > Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org> > Reviewed-by: Steve Anton <steveanton@webrtc.org> > Cr-Commit-Position: refs/heads/master@{#22611} TBR=steveanton@webrtc.org,deadbeef@webrtc.org,shampson@webrtc.org # Not skipping CQ checks because original CL landed > 1 day ago. Bug: webrtc:7932, webrtc:7933 Change-Id: I1d4e4332b518ec32b305c8af07679650059d02bb Reviewed-on: https://webrtc-review.googlesource.com/65000 Reviewed-by: Emircan Uysaler <emircan@webrtc.org> Commit-Queue: Emircan Uysaler <emircan@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22634}