GitLab

Spec: https://aomediacodec.github.io/av1-isobmff/

BUG=875499

Change-Id: I97a966acd0eb40dd10ff3f154ca396e8e7b2ab6e
Reviewed-on: https://chromium-review.googlesource.com/1180244
Commit-Queue: Tom Finegan <tomfinegan@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584508}