[Picture-in-Picture] Do not require feature flag in tests.

This CL makes sure Picture-in-Picture Web API tests don't require
kPictureInPicture feature flag.

Bug: 806249
Change-Id: Ic2a95b6ded01813f97373f91f13bdad01ccc419a
Reviewed-on: https://chromium-review.googlesource.com/1071569
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Commit-Queue: François Beaufort <beaufort.francois@gmail.com>
Cr-Commit-Position: refs/heads/master@{#561498}
1 file changed