Remove first_message argument from AuthenticatorFactory::Create().

remoting/protocol/authenticator.h

 // 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.
 
 #ifndef REMOTING_PROTOCOL_AUTHENTICATOR_H_
 #define REMOTING_PROTOCOL_AUTHENTICATOR_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 116 matching lines @@
   // Called when session-initiate stanza is received to create
   // authenticator for the new session. |first_message| specifies
   // authentication part of the session-initiate stanza so that
   // appropriate type of Authenticator can be chosen for the session
   // (useful when multiple authenticators is supported). Returns nullptr
   // if the |first_message| is invalid and the session should be
   // rejected. ProcessMessage() should be called with |first_message|
   // for the result of this method.
   virtual scoped_ptr<Authenticator> CreateAuthenticator(
       const std::string& local_jid,
-      const std::string& remote_jid,
-      const buzz::XmlElement* first_message) = 0;
+      const std::string& remote_jid) = 0;
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_AUTHENTICATOR_H_