Use base::size rather than arraysize in apps/.

This is purely a mechanical change; there is no intended behavior change.

BUG=837308
TBR=mgiuca@chromium.org

Change-Id: I24d6673fdc32c84d3bff01dd43bc62a80467eb7d
Reviewed-on: https://chromium-review.googlesource.com/c/1390908
Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#618892}
1 file changed