It isn't used and can easily be replaced with posting a task, as shown in the changes to the unit test. Also removing the sequenced task checker that no longer adds any value. We now ensure that the task can only be stopped with a reference to the task queue it runs on. Bug: webrtc:10365 Change-Id: Ie8aef6f742c55db1fb686f20c2a28c606c721fa0 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/129725 Commit-Queue: Sebastian Jansson <srte@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#27292}