json_schema_compiler: any, additionalProperties, functions on types

chrome/common/extensions/api/chromeosInfoPrivate.json

 [
   {
     "namespace": "chromeosInfoPrivate",
     "nodoc": "true",
     "functions": [
       {
         "name": "get",
         "description": "Fetches customization values for the given property names. See property names in the declaration of the returned dictionary.",
         "type": "function",
         "parameters": [
           {
             "name": "propertyNames",
             "type": "array",
-            "item": {"type": "string", "description": "Chrome OS Property name"}
+            "description": "Chrome OS Property names",
+            "items": {"type": "string"}
           },
           {
             "name": "callback",
             "type": "function",
             "parameters": [
               {
                 "name": "propertiesDictionary",
                 "type": "object",
                 "description": "Dictionary which contains all requested properties",
                 "properties": {
                   "hwid": {"type": "string", "optional": "true", "description": "Hardware ID"},
                   "homeProvider" : {"type": "string", "optional": "true", "description": "Home provider which is used by the cellular device"},
                   "initialLocale" : {"type": "string", "optional": "true", "description": "Initial locale for the device"}
                 }
               }
             ]
           }
         ]
       }
     ]
   }
 ]