GitLab

Add double tap gesture recognition to MediaControlOverlayPlayButton so
it can detect double tap gestures on the side and jump accordingly. Adds
LayoutTests as a virtual test suite so they are tested with the modern
media controls flag on.

BUG=779989

Change-Id: I6e62f88bc51794b21132ec0532cdbd8c5ccbb677
Reviewed-on: https://chromium-review.googlesource.com/757138
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Reviewed-by: Tommy Steimel <steimel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#517839}