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

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

BUG=837308
[email protected]

Change-Id: I5ce196bbb75462a0967a95d1b5fd2e72df2c86f4
Reviewed-on: https://chromium-review.googlesource.com/c/1390894
Reviewed-by: Avi Drissman <[email protected]>
Commit-Queue: Avi Drissman <[email protected]>
Cr-Commit-Position: refs/heads/master@{#618881}
88 files changed