Remote desktop wrapper needs to create a barrier on when the screencast
portal is done (either succeeded or failed). This change adds an initial
enum to differentiate it from other values. CL also generalizes the
helper `PortalFailed` to `OnPortalDone` so as to account for both
failure/success scenarios.
Bug: chromium:1291247
Change-Id: I188f72533e75a88c9b30ce2bb093dae548cef7b1
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/258540
Reviewed-by: Alexander Cooper <alcooper@chromium.org>
Commit-Queue: Salman Malik <salmanmalik@google.com>
Cr-Commit-Position: refs/heads/main@{#36526}
49a106c8e6