Allow comments in extension config files.

chrome/common/extensions/api/experimental.rlz.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": "experimental.rlz",
     "nodoc": true,
     "types": [],
     "functions": [
       {
         "name": "recordProductEvent",
         "type": "function",
         "description": "Records an RLZ event for a given product's access point.",
@@ skipping 33 matching lines @@
         "description": "Clears all product-specific RLZ state from the machine, as well as clearing all events for the specified access points.",
         "parameters": [
           {"name": "product", "type": "string", "minLength": 1, "maxLength": 1},
           {"name": "accessPoints", "type": "array", "items": {"type": "string", "minLength": 1, "maxLength": 2}, "minItems": 1}
         ]
       }
     ],
     "events": []
   }
 ]