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

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

BUG=837308

Change-Id: I696e8015bd186b2977777eac39ed49e6ec0fa6b5
Reviewed-on: https://chromium-review.googlesource.com/c/1390725
Reviewed-by: Ken Rockot <rockot@google.com>
Commit-Queue: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#618936}
2 files changed