Use base::size rather than arraysize.

BUG=837308

Change-Id: I7c8e3a6ccf454cd0bbaca2692d3eccbd772f2e0f
Reviewed-on: https://chromium-review.googlesource.com/c/1390098
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#618973}
2 files changed