Safari needs to pass strings back from a user decision of whether to open or not open a piece of video or audio capturing device on his or her computer.
<rdar://problem/21884225>
(In reply to comment #0) > Safari needs to pass strings back from a user decision of whether to open or > not open a piece of video or audio capturing device on his or her computer. It's not just Safari. It's any UIProcess client.
This was fixed as a part of other patches.