This reverts commit 475006d4a30f8bc47f82eb540a6a066da2829095.
Reason for revert: Speculative revert. Breaks downstream project
Original change's description:
> Revert back to using the task_queue_ for guarding access.
>
> This removes the SequenceChecker that was temporarily used while
> the rtc::Thread TQ implementation was being fixed.
>
> Bug: none
> Change-Id: Iaa46e47371211ac0a97b2dcaf23cef12b43ee8ea
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/175081
> Commit-Queue: Tommi <tommi@webrtc.org>
> Reviewed-by: Sebastian Jansson <srte@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#31256}
TBR=tommi@webrtc.org,srte@webrtc.org
Change-Id: I17a12bdca888a63f2fd161da30c0def5b9c3d04e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: none
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/175103
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31258}
af1b9ceb62