Make MediaSession per frame as an attribute of Navigator

third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt

Index: third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt
diff --git a/third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt b/third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt
index f00471f305c19be29f6179c6e8d1b48b8005bb8b..ef60ad3471e465954a161e3095663dfea7adea0a 100644
--- a/third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt
+++ b/third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt
@@ -3757,6 +3757,12 @@ interface MediaError
     attribute MEDIA_ERR_SRC_NOT_SUPPORTED
     getter code
     method constructor
+interface MediaImage
+    attribute @@toStringTag
+    getter sizes
+    getter src
+    getter type
+    method constructor
 interface MediaKeyMessageEvent : Event
     attribute @@toStringTag
     getter message
@@ -3810,6 +3816,13 @@ interface MediaList
     method deleteMedium
     method item
     setter mediaText
+interface MediaMetadata
+    attribute @@toStringTag
+    getter album
+    getter artist
+    getter artwork
+    getter title
+    method constructor
 interface MediaQueryList : EventTarget
     attribute @@toStringTag
     getter matches
@@ -3852,6 +3865,11 @@ interface MediaRecorder : EventTarget
     setter onresume
     setter onstart
     setter onstop
+interface MediaSession
+    attribute @@toStringTag
+    getter metadata
+    method constructor
+    setter metadata
 interface MediaSettingsRange
     attribute @@toStringTag
     getter current
@@ -4069,6 +4087,7 @@ interface Navigator
     getter languages
     getter maxTouchPoints
     getter mediaDevices
+    getter mediaSession
     getter mimeTypes
     getter nfc
     getter onLine