GitLab

This CL adds a new "panTiltZoom" PermissionDescriptor key to the
Permissions API to be used as an extension to camera permission.

The normal camera permission can still be queried using {name: "camera"}
(panTiltZoom is false by default) while the pan/tilt/zoom camera
permission can be requested using {name: "camera", panTiltZoom: true}.

    navigator.permissions.query({"name":"camera","panTiltZoom":true})

This CL only implements the Permissions API. getUserMedia implementation
will follow when detection for PTZ connected/selected camera is added.

Spec change: https://github.com/w3c/permissions/pull/204
Manual test: https://ptz.glitch.me/

Bug: 934063
Change-Id: I0884caebfdba3df9d66599cb84f437db9af35b9c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2116070Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Andy Paicu <andypaicu@chromium.org>
Commit-Queue: François Beaufort <beaufort.francois@gmail.com>
Cr-Commit-Position: refs/heads/master@{#759150}