Updating JSON Schema Compiler to add description field to schemas.

chrome/common/extensions/api/diagnostics.idl

 // 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.
 
+// Use the <code>chrome.diagnostics</code> API to query various properties of
+// the environment that may be useful for diagnostics.
 namespace diagnostics {
   dictionary SendPacketOptions {
     // Target IP address.
     DOMString ip;
     // Packet time to live value. If omitted, the system default value will be
     // used.
     long? ttl;
     // Packet timeout in seconds. If omitted, the system default value will be
     // used.
     long? timeout;
     // Size of the payload. If omitted, the system default value will be used.
     long? size;
   };
 
   dictionary SendPacketResult {
     // The IP of the host which we recieves the ICMP reply from.
     // The IP may differs from our target IP if the packet's ttl is used up.
     DOMString ip;
-    
+
     // Latency in millisenconds.
     double latency;
   };
 
   callback SendPacketCallback = void(SendPacketResult result);
 
   interface Functions {
     // Send a packet of the given type with the given parameters.
     static void sendPacket(SendPacketOptions options,
                            SendPacketCallback callback);
   };
 };