Cleanup arraysize usage in //storage

This CL cleanup arraysize usage in //storage with:
- Range based for-loops when iterating
- Replace with base::size()

Bug: 837308
Change-Id: Id4c9eedf4371b819e61d735b6cdbb68eeeb7594c
Reviewed-on: https://chromium-review.googlesource.com/c/1377474
Reviewed-by: Joshua Bell <jsbell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616708}
24 files changed