Bug 1528042 - Don't expose number of devices of a kind unless informa…

…tion can be exposed for that kind per w3c/mediacapture-main#900. r=karlt

Differential Revision: https://phabricator.services.mozilla.com/D176925

UltraBlame original commit: 364f837033b89f56f75b4ec40d839fcdbd1693d8

dom/media/MediaDevices.cpp

@@ -2099,9 +2099,7 @@ mRawGroupID
 if
 (
 !
-DeviceInformationCanBeExposed
-(
-)
+mCanExposeMicrophoneInfo
 &
 &
 !
@@ -2132,9 +2130,7 @@ continue
 if
 (
 !
-DeviceInformationCanBeExposed
-(
-)
+mCanExposeCameraInfo
 &
 &
 !

testing/web-platform/tests/mediacapture-streams/MediaDevices-enumerateDevices.https.html

@@ -860,10 +860,10 @@
 =
 >
 kind
-!
+=
 =
 "
-audiooutput
+videoinput
 "
 )
 .
@@ -880,10 +880,10 @@
 =
 >
 kind
-!
+=
 =
 "
-audiooutput
+videoinput
 "
 )
 .
@@ -892,7 +892,59 @@
 same
 number
 of
-input
+(
+previously
+exposed
+)
+videoinput
+devices
+"
+)
+;
+assert_greater_than_equal
+(
+devices
+.
+filter
+(
+d
+=
+>
+d
+.
+kind
+=
+=
+"
+audioinput
+"
+)
+.
+length
+devices1
+.
+filter
+(
+d
+=
+>
+d
+.
+kind
+=
+=
+"
+audioinput
+"
+)
+.
+length
+"
+same
+number
+or
+more
+audioinput
 devices
 "
 )