This avoids the pacer thread waking up at 5ms interval if a PeerConnection is created without actually using media. The TaskQueuePacedSender solves the problem too, this CL is mostly a safeguard in case we still find issues when turning it on... Can be turned off by setting field trial "WebRTC-LazyPacerStart" to "Disabled". Bug: webrtc:10809 Change-Id: I8501106e608eccb14487576f24bdceaf3f324d80 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/183982 Reviewed-by: Sebastian Jansson <srte@webrtc.org> Reviewed-by: Tommi <tommi@webrtc.org> Commit-Queue: Erik Språng <sprang@webrtc.org> Cr-Commit-Position: refs/heads/master@{#32101}