Allow comments in extension config files.

chrome/common/extensions/api/mediaPlayerPrivate.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",
     "types": [
       {
         "id": "Playlist",
         "type": "object",
         "description": "Mediaplayer playlist stored in the browser (it extsts even if the mediaplayer is closed).",
         "properties": {
@@ skipping 67 matching lines @@
     "events": [
       {
         "name": "onPlaylistChanged",
         "type": "function",
         "description": "Notifies that playlist content or state has been changed. Data could be retrieved via 'getPlaylist'.",
         "parameters": []
       }
     ]
   }
 ]