[mediacapture-main] Consider cross-spec device IDs

jyasskin has just created a new issue for 
https://github.com/w3c/mediacapture-main:

== Consider cross-spec device IDs ==
https://w3c.github.io/mediacapture-main/#idl-def-MediaDeviceInfo 
defines the `groupId` field to identify a physical device. 
http://webaudio.github.io/web-midi-api/#idl-def-MIDIPort defines the 
`id` field to identify the device. 
https://webbluetoothcg.github.io/web-bluetooth/#bluetoothdevice 
defines the `instanceId` field to identify a device. A single physical
 device could appear in more than one of these APIs, and it'd be nice 
to let web pages figure out that it's a single device, to the extent 
the browser knows.

@cwilso @slightlyoff (I'm not sure if it makes to file this in a 
couple of the affected specs, or if it should be a TAG issue.)

See https://github.com/w3c/mediacapture-main/issues/202

Received on Thursday, 25 June 2015 22:29:20 UTC