ABSL_CONST_INIT must be on definitions, not just declarations.
Bug: chromium:1284275
Change-Id: If57064ab9417df38f770c59e50be93a104748b72
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/263282
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Commit-Queue: Rasmus Brandt <brandtr@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36994}