This function is not present in std::optional
The only use of MoveValue doesn't need move since
copying underneath struct is as correct and as fast as moving
Bug: webrtc:9078
Change-Id: Ic0c87e50ffd8f6c024759b14ceeb8922b5d3a6fd
Reviewed-on: https://webrtc-review.googlesource.com/64986
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22646}