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

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

BUG=837308

Change-Id: I57f7923f0dd3c30f3115ab0b8d52f4038b30d8c6
Reviewed-on: https://chromium-review.googlesource.com/c/1390720
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#618964}
6 files changed