Move API functions registrations out of ExtensionFunctionRegistry.

chrome/common/extensions/api/media_player_private.json

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 [
   {
     "namespace": "mediaPlayerPrivate",
     "nodoc": "true",
+    "compiler_options": {
+      "implemented_in": "chrome/browser/chromeos/extensions/media_player_api.h"
+    },
+    "platforms": ["chromeos"],
     "types": [
       {
         "id": "Playlist",
         "type": "object",
         "description": "Mediaplayer playlist stored in the browser (it exists even if the mediaplayer is closed).",
         "properties": {
           "items": {
             "name": "items",
             "type": "array",
             "description": "Array of URLs for media files (in 'filesystem:' scheme for local files)",
@@ skipping 81 matching lines @@
       },
       {
         "name": "onTogglePlayState",
         "type": "function",
         "description": "Notifies that a play/pause toggle was requested.",
         "parameters": []
       }
     ]
   }
 ]