GitLab

Make the return type of property metadata's getter function to be more
flexible so that both returning a value and returning a constant
reference of that value are allowed.

Also, convert ImageViewBase's accessible_name to a property as an
example of such usage.

BUG=938501,957272

Change-Id: I8d6adeb9392b06be948b9fcf727b408661791f1a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1615380Reviewed-by: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Allen Bauer <kylixrd@chromium.org>
Commit-Queue: Wei Li <weili@chromium.org>
Cr-Commit-Position: refs/heads/master@{#660883}