GitLab

Add a new content type with no per-type volume control (only
per-stream).

Bug: internal b/78533406

Change-Id: If0d7280c54ba95fd583e7292814e476862d52335
Reviewed-on: https://chromium-review.googlesource.com/1026452
Commit-Queue: Kenneth MacKay <kmackay@chromium.org>
Reviewed-by: Stephen Lanham <slan@chromium.org>
Reviewed-by: Luke Halliwell <halliwell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553755}