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

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

BUG=837308
TBR=dalecurtis@chromium.org

Change-Id: I1651766839b1872ed0be25210e4196ce9cee8a0f
Reviewed-on: https://chromium-review.googlesource.com/c/1390721
Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#618874}
114 files changed