MediaStream API: Patch #3 of implementing navigator.getMediaDevices

LayoutTests/fast/mediastream/getMediaDevices-expected.txt

+Tests navigator.getMediaDevices
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS navigator.getMediaDevices(devicesCallback); did not throw exception.
+PASS After getMediaDevices
+PASS Devices returned.
+PASS devices.length is 3
+PASS devices[0].deviceId.length is > 0
+PASS devices[1].deviceId.length is > 0
+PASS devices[2].deviceId.length is > 0
+PASS devices[0].deviceId is not devices[1].deviceId
+PASS devices[0].deviceId is not devices[2].deviceId
+PASS devices[1].deviceId is not devices[2].deviceId
+PASS devices[0].kind is "audioinput"
+PASS devices[1].kind is "audiooutput"
+PASS devices[2].kind is "videoinput"
+PASS devices[0].label.length is > 0
+PASS devices[1].label.length is > 0
+PASS devices[2].label.length is > 0
+PASS devices[0].label is not devices[1].label
+PASS devices[0].label is not devices[2].label
+PASS devices[1].label is not devices[2].label
+PASS devices[0].groupId.length is > 0
+PASS devices[1].groupId.length is > 0
+PASS devices[2].groupId.length is > 0
+PASS devices[0].groupId is devices[1].groupId
+PASS devices[0].groupId is not devices[2].groupId
+PASS successfullyParsed is true
+
+TEST COMPLETE
+