GitLab

These parts are not used ATM, this CL removes them until further notice.

> Add still image capture interface for VideoCaptureDevice.
>
> BUG=413086
> TEST=Run the media_unittests on peach_pit.
>
> Committed: https://crrev.com/fd5bdd2688768683e30b27941f181597a849656d
> Cr-Commit-Position: refs/heads/master@{#298009}

TBR=posciak@chromium.org, perkj@chromium.org, tommi@chromium.org

BUG=413086, 440843

Review URL: https://codereview.chromium.org/921683004

Cr-Commit-Position: refs/heads/master@{#318183}