Also removing has_slots depdency from OpenSSLStreamAdapter and moving it to the OpenSSLStreamAdapter subclass where it's still needed. Bug: webrtc:11943 Change-Id: Ibcae5ea1efff146d78b32bb0eca63d7f44ed08c1 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/318885 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org> Cr-Commit-Position: refs/heads/main@{#40702}