Chromecast: adds Android switches for media playback.

Since Cast disables all user interaction, gesture requirement/infobar are
not useful.

The other flags are for protected content playback.

R=xhwang@chromium.org,byungchul@chromium.org
BUG=400876

Review URL: https://codereview.chromium.org/597813002

Cr-Commit-Position: refs/heads/master@{#297113}
2 files changed