GitLab

Change the API to override the ContentMetadataProvider worker URL and
update Audio Player, Gallery and Files app.

Bug: 1133186
Change-Id: Ie8024f53bd11d8faebb3cd0020af35042dbccbd7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2639058Reviewed-by: Jeremie Boulic <jboulic@chromium.org>
Commit-Queue: Luciano Pacheco <lucmult@chromium.org>
Auto-Submit: Luciano Pacheco <lucmult@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845084}