Updating JSON Schema Compiler to add description field to schemas.

chrome/common/extensions/api/devtools/experimental_console.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.devtools.console",
+    "description": "Use the <code>chrome.experimental.devtools.console</code> API to retrieve messages from the inspected page console and post messages there.",
     "nocompile": true,
     "functions": [
       {
         "name": "addMessage",
         "type": "function",
         "description": "Adds a message to the console.",
         "parameters": [
           { "name": "severity", "$ref": "Severity", "description": "The severity of the message." },
           { "name": "text", "type": "string", "description": "The text of the message." }
         ]
@@ skipping 72 matching lines @@
         "name": "onMessageAdded",
         "type": "function",
         "description": "Fired when a new message is added to the console.",
         "parameters": [
           { "name": "message", "$ref": "ConsoleMessage" }
         ]
       }
     ]
   }
 ]