This reverts commit 44dd3d743517fe85212ba4f68bda1e78c2e6d7ec. Reason for revert: crbug.com/1104081 Original change's description: > Migrate modules/desktop_capture and modules/video_capture to webrtc::Mutex. > > Bug: webrtc:11567 > Change-Id: I7bfca17f91bf44151148f863480ce77804d53a04 > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/178805 > Commit-Queue: Markus Handell <handellm@webrtc.org> > Reviewed-by: Tommi <tommi@webrtc.org> > Cr-Commit-Position: refs/heads/master@{#31681} TBR=tommi@webrtc.org,handellm@webrtc.org # Not skipping CQ checks because original CL landed > 1 day ago. Bug: webrtc:11567 Change-Id: I4ee39947ba206522bce611341caef84ddb538068 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/179080 Reviewed-by: Markus Handell <handellm@webrtc.org> Commit-Queue: Markus Handell <handellm@webrtc.org> Cr-Commit-Position: refs/heads/master@{#31702}