This CL moves the two OOURA implementations present in the WebRTC tree in one place. No functional change is expected. TBR=kwiberg@webrtc.org No-Try: True Bug: webrtc:11509 Change-Id: I330a9ec57e3dc65c9c8b43edd4bb295c55920efa Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/173682 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#31106}