Remove first_message argument from AuthenticatorFactory::Create().

remoting/protocol/fake_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_FAKE_AUTHENTICATOR_H_
 #define REMOTING_PROTOCOL_FAKE_AUTHENTICATOR_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 83 matching lines @@
 class FakeHostAuthenticatorFactory : public AuthenticatorFactory {
  public:
   FakeHostAuthenticatorFactory(
       int round_trips, int messages_till_start,
       FakeAuthenticator::Action action, bool async);
   ~FakeHostAuthenticatorFactory() override;
 
   // AuthenticatorFactory interface.
   scoped_ptr<Authenticator> CreateAuthenticator(
       const std::string& local_jid,
-      const std::string& remote_jid,
-      const buzz::XmlElement* first_message) override;
+      const std::string& remote_jid) override;
 
  private:
   int round_trips_;
   int messages_till_started_;
   FakeAuthenticator::Action action_;
   bool async_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeHostAuthenticatorFactory);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_FAKE_AUTHENTICATOR_H_