[Extensions] Convert APIs to use movable types [7]

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",
     "compiler_options": {
-      "implemented_in": "chrome/browser/chromeos/extensions/media_player_api.h"
+      "implemented_in": "chrome/browser/chromeos/extensions/media_player_api.h",
+      "use_movable_types": true
     },
     "description": "none",
     "events": [
       {
         "name": "onNextTrack",
         "type": "function",
         "description": "Notifies that the next track was requested.",
         "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": []
       }
     ]
   }
 ]