Media Controls: Speed up overflow animation

This CL updates the CSS transitions for the media controls overflow
menu to be faster.

Bug: 955803
Change-Id: I48f99178e2645c286d2c50ea10fe93422b297c18
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1582621
Reviewed-by: Becca Hughes <beccahughes@chromium.org>
Commit-Queue: Tommy Steimel <steimel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653688}
1 file changed