commit 589ae45d0fa79e4d637bb21ce6bb0696f74db448
author Tommi <tommi@webrtc.org> Sun Oct 15 21:20:46 2017 +0000
committer Commit Bot <commit-bot@chromium.org> Sun Oct 15 21:50:06 2017 +0000
tree 6ed8f36e0d811daae14eb854a93ffa6cf5009780
parent 8eb9c7d8388b449fb8c19b2e06615e4c5b304005

Revert "Reject the subsequent offer with fewer m= sections."

This reverts commit a8264dbdd97f5e125d45fd0e84356f2e1f747df1.

Reason for revert: Reverting to unblock rolls into Chromium.
See failure here:
https://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_rel_ng/builds/565449

Fails: external/wpt/webrtc/RTCPeerConnection-setRemoteDescription-offer.html

I'm guessing these lines from the output are relevant:

12:15:32.525 11839   [1:19:1015/121532.495175:16438293900:ERROR:webrtcsession.cc(350)] Failed to set remote offer sdp: The order of m-lines in subsequent offer doesn't match order from previous offer/answer.
12:15:32.525 11839   [1:20:1015/121532.497199:16438296127:WARNING:delay_based_bwe.cc(326)] BWE Setting start bitrate to: 300000
12:15:32.525 11839   [1:1:1015/121532.498272:16438296963:ERROR:webrtcsdp.cc(359)] Failed to parse: "Invalid SDP". Reason: Expect line: v=
12:15:32.525 11839   [1:1:1015/121532.498364:16438297040:ERROR:rtc_peer_connection_handler.cc(2183)] Failed to create native session description. Type: offer SDP: Invalid SDP
12:15:32.525 11839   [1:1:1015/121532.498432:16438297104:ERROR:rtc_peer_connection_handler.cc(1458)] Failed to parse SessionDescription. Invalid SDP Expect line: v=

Original change's description:
> Reject the subsequent offer with fewer m= sections.
> 
> If the subsequent offer contains fewer m= sections than the existing
> description, it would be rejected.
> 
> The helper method MediaSectionsInSameOrder is modified and it will
> compare the number of m= sections before matching the media type.
> 
> Bug: chromium:773620
> Change-Id: Ic8999445f4bc023da1d85a65659583db1687ec37
> Reviewed-on: https://webrtc-review.googlesource.com/9621
> Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org>
> Commit-Queue: Zhi Huang <zhihuang@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#20298}

TBR=deadbeef@webrtc.org,zhihuang@webrtc.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: chromium:773620
Change-Id: I4a3ff7a42abb95144615b1dd37fb21585ee07b5d
Reviewed-on: https://webrtc-review.googlesource.com/10920
Reviewed-by: Tommi <tommi@webrtc.org>
Commit-Queue: Tommi <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20300}