This includes relying on related types such as MessageData and PostEvent functionality inside the StreamInterface itself. This affects mostly tests but OpenSSLStreamAdapter requires special attention. Bug: webrtc:11988 Change-Id: Ib5c895f1bdf77bb49e3162bd49718f8a98812d91 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/185505 Commit-Queue: Tommi <tommi@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#32290}