GitLab

CL followup - make XRDepthData into an union so that it is possible
to express that the data sent over mojom boundary is either still valid,
or that new data has arrived.

For discussion, see:
https://crrev.com/c/2391619/comment/177fee99_a1338219/

Change-Id: I240357a32dc7fadcae379c3b5f1ca29bdeffcb6c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2417570Reviewed-by: Alexander Cooper <alcooper@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Piotr Bialecki <bialpio@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809471}