Camera/Microphone
* Requests for camera and microphone mediated by the Chrome process
** Chrome code controls the prompt, which displays the origin of the requester to the user ** Content process can lie about its origin, but user still has to approve (i.e. content process can only use the camera without user permission, if it can guess an origin that has been pre-granted access)
* Camera/Microphone indicators must always be shown (content process shouldnt be able to hide them)
