To ensure the class can be used by Chrome etc. Bug: webrtc:11943 Change-Id: I54951b5a2005f0efbe2c9fcb58e67e4fe7508b3b Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/329020 Auto-Submit: Per Kjellander <perkj@webrtc.org> Commit-Queue: Per Kjellander <perkj@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#41268}