Ash: Support "Next Song", "Previous Song", "Play/Pause" Multi Media buttons

chrome/common/extensions/api/media_player_private.json

Index: chrome/common/extensions/api/media_player_private.json
diff --git a/chrome/common/extensions/api/media_player_private.json b/chrome/common/extensions/api/media_player_private.json
index fef30a00ce9898c21b94933c4a18ead2304ab8e9..5d77ab99a867c5469cd0fb79a180474cbc95c3d1 100644
--- a/chrome/common/extensions/api/media_player_private.json
+++ b/chrome/common/extensions/api/media_player_private.json
@@ -81,10 +81,28 @@
     ],
     "events": [
       {
+        "name": "onNextTrack",
+        "type": "function",
+        "description": "Notifies that the next track was requested.",
+        "parameters": []
+      },
+      {
         "name": "onPlaylistChanged",
         "type": "function",
         "description": "Notifies that playlist content or state has been changed. Data could be retrieved via 'getPlaylist'.",
         "parameters": []
+      },
+      {
+        "name": "onPrevTrack",
+        "type": "function",
+        "description": "Notifies that the previous tack was requested.",
+        "parameters": []
+      },
+      {
+        "name": "onTogglePlayState",
+        "type": "function",
+        "description": "Notifies that a play/pause toggle was requested.",
+        "parameters": []
       }
     ]
   }