GitLab

Generate DIR_METADATA files and remove metadata from OWNERS
files for directories under //content.

R=boliu@chromium.org

Bug: 1113033
Change-Id: Iab77bab240ce5482ad7ae97ae5c37555f15f0241
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2543250Reviewed-by: Bo <boliu@chromium.org>
Commit-Queue: Bo <boliu@chromium.org>
Auto-Submit: Josip Sokcevic <sokcevic@google.com>
Cr-Commit-Position: refs/heads/master@{#828340}