GitLab

Posting async tasks to the default timer queue can lead to media tasks
being throttled, which may lead to videos being stopped in background.

R=haraken@chromium.org,hajimehoshi@chromium.org
BUG=779962, 786332

Change-Id: Ic50890f909ed824a9d8048d5ef5af590b3cd086b
Reviewed-on: https://chromium-review.googlesource.com/822931Reviewed-by: Hajime Hoshi <hajimehoshi@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Alexander Timin <altimin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524292}