Updating JSON Schema Compiler to add description field to schemas.

chrome/common/extensions/api/page_actions.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": "pageActions",
-    "nodoc": true,
+    "description": "none",
     "maximumManifestVersion": 1,
-    "types": [],
     "functions": [
       {
         "name": "enableForTab",
         "type": "function",
         "description": "Enables a page action for a particular tab+URL combination (makes its icon visible in the OmniBox when a certain URL is active in a given tab). The page action will automatically be disabled (its icon hidden) if the user navigates to a new URL or closes the tab. The action will also automatically be enabled/disabled as the user switches tabs.",
         "parameters": [
           {"type": "string", "name": "pageActionId", "description": "An extension can have multiple page actions specified in the manifest, each with a unique identifier. This string identifies which page action you want to enable (and must match a page action id declared in the manifest)."},
           {
             "type": "object",
             "name": "action",
@@ skipping 23 matching lines @@
               "url": {"type": "string", "description": "The URL of the page you want the page action to not apply to. If the URL specified does not match the currently navigated URL (user has navigated to another page) then no action is taken."}
             },
             "optional": false
           }
         ]
       }
     ],
     "events": []
   }
 ]