An SCTP transport for Data Channels allows changing the maximum message size through SDP. See https://w3c.github.io/webrtc-pc/#sctp-transport-update-mms Bug: webrtc:12614 Change-Id: I8cff33c5f9c1d60934a726c546bc9cbdcd9e22d9 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/217387 Reviewed-by: Victor Boivie <boivie@webrtc.org> Commit-Queue: Florent Castelli <orphis@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33920}