GitLab

They return ownership via raw pointer, and they're unneeded.

Also remove AsUIImage as it has no callers.

BUG=904645

Change-Id: I18497ae1e32ad36ec78cdcf3c5df07d0faf8af39
Reviewed-on: https://chromium-review.googlesource.com/c/1333876
Commit-Queue: Avi Drissman <avi@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608601}