Fix nits. Add 'const'.

chrome/browser/sync/tools/sync_listen_notifications.cc

 // Copyright (c) 2010 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.
 
 #include <string>
 #include <vector>
 
 #include "base/at_exit.h"
 #include "base/base64.h"
 #include "base/command_line.h"
@@ skipping 281 matching lines @@
   xmpp_client_settings.set_pass(
       talk_base::CryptString(insecure_crypt_string));
   talk_base::SocketAddress addr(server, port);
   if (!addr.ResolveIP()) {
     LOG(ERROR) << "Could not resolve " << addr.ToString();
     return -1;
   }
   xmpp_client_settings.set_server(addr);
 
   net::CertVerifier cert_verifier;
-
   MessageLoopForIO message_loop;
 
   // Connect and listen.
   ServerNotifierDelegate server_notifier_delegate(
       server_notifier_state);
   LegacyNotifierDelegate legacy_notifier_delegate(
       legacy_notifier_send_initial_update);
   std::vector<XmppNotificationClient::Observer*> observers;
   if (use_legacy_notifier) {
     observers.push_back(&legacy_notifier_delegate);
   } else {
     observers.push_back(&server_notifier_delegate);
   }
   XmppNotificationClient xmpp_notification_client(
       observers.begin(), observers.end());
   xmpp_notification_client.Run(xmpp_client_settings, &cert_verifier);
 
   return 0;
 }