Updating JSON Schema Compiler to add description field to schemas.

chrome/common/extensions/api/activity_log_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": "activityLogPrivate",
+    "description": "none",
     "types": [
       {
         "id": "DomActivityDetail",
         "type": "object",
         "description": "Stores the fields associated with an ActivityLog DomAction.",
         "properties": {
           "domActivityType": {"type": "string", "enum": ["getter", "setter", "method", "inserted", "xhr", "webrequest", "modified"], "optional": true},
           "url": {"type": "string", "optional": true},
           "urlTitle": {"type": "string", "optional": true},
           "apiCall": {"type": "string", "optional": true},
@@ skipping 98 matching lines @@
         "parameters": [
           {
             "name": "activity",
             "$ref": "ExtensionActivity"
           }
         ]
       }
     ]
   }
 ]