Updating JSON Schema Compiler to add description field to schemas.

chrome/common/extensions/api/command_line_private.json

 // Copyright 2013 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": "commandLinePrivate",
+    "description": "none",
     "functions": [
       {
         "name": "hasSwitch",
         "type": "function",
         "description": "Returns whether a switch is specified on the command line when launching Chrome.",
         "parameters": [
           {
             "name": "name",
             "type": "string",
             "description": "The name of a command line switch, without leading \"--\", such as \"enable-experimental-extension-apis\"."
           },
           {
             "name": "callback",
             "type": "function",
             "parameters": [
               {
                 "name": "result",
                 "type": "boolean",
                 "description": "Whether the switch is specified on the command line."
               }
             ]
           }
         ]
       }
     ]
   }
 ]