GitLab

Enable ducking for flash based videos.

BUG=931892

Change-Id: I68ee115d6a5938a86ca624b2cfa5295b9d95e43b
Reviewed-on: https://chromium-review.googlesource.com/c/1481588Reviewed-by: Tommy Steimel <steimel@chromium.org>
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#634380}