This is a reland of fdd6d3e46e22e1242aa4acd7aa0271a7562fb0ac Original change's description: > Delete deprecated rtc::Thread default constructor > > Bug: None > Change-Id: Ic0e2e94b174a49e5d20ebdea90568473e1b71d62 > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/134640 > Reviewed-by: Tommi <tommi@webrtc.org> > Commit-Queue: Niels Moller <nisse@webrtc.org> > Cr-Commit-Position: refs/heads/master@{#27958} Tbr: tommi@webrtc.org Bug: None Change-Id: I9e4b1d06e79670b4efb9c9517d909a0562485e12 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/137504 Reviewed-by: Niels Moller <nisse@webrtc.org> Commit-Queue: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#27982}