This fixes a crash introduced with recent move of Scoped class for
glib objects into a separated implementation.
Bug: chromium:1291247
Change-Id: I49d56bc0811f52434213516f51ca9e8712692e15
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/250840
Reviewed-by: Mark Foltz <mfoltz@chromium.org>
Commit-Queue: Mark Foltz <mfoltz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#35922}