This extends AlwaysValidPointer to avoid creating a unique_ptr inside it. Bug: webrtc:13145 Change-Id: I73a4f18d0a7037b57f575b04b134e4f7eadceb79 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/263240 Reviewed-by: Jonas Oreland <jonaso@webrtc.org> Commit-Queue: Daniel.L (Byoungchan) Lee <daniel.l@hpcnt.com> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#37048}