Updating JSON Schema Compiler to add description field to schemas.

chrome/common/extensions/api/devtools/inspected_window.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": "devtools.inspectedWindow",
+    "description": "Use the <code>chrome.devtools.inspectedWindow</code> API to interact with the inspected window: obtain the tab ID for the inspected page, evaluate the code in the context of the inspected window, reload the page, or obtain the list of resources within the page.",
     "nocompile": true,
     "types": [
       {
         "id": "Resource",
         "type": "object",
         "description": "A resource within the inspected page, such as a document, a script, or an image.",
         "properties": {
           "url": {
             "type": "string",
             "description": "The URL of the resource."
@@ skipping 169 matching lines @@
           {
             "name": "content",
             "type": "string",
             "description": "New content of the resource."
           }
         ]
       }
     ]
   }
 ]