Remove first_message argument from AuthenticatorFactory::Create().

remoting/host/remoting_me2me_host.cc

 // 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.
 //
 // This file implements a standalone host process for Me2Me.
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <string>
@@ skipping 214 matching lines @@
 };
 
 // Factory for Authenticator instances.
 class NoopAuthenticatorFactory : public protocol::AuthenticatorFactory {
  public:
   NoopAuthenticatorFactory() {}
   ~NoopAuthenticatorFactory() override {}
 
   scoped_ptr<protocol::Authenticator> CreateAuthenticator(
       const std::string& local_jid,
-      const std::string& remote_jid,
-      const buzz::XmlElement* first_message) override {
+      const std::string& remote_jid) override {
     return make_scoped_ptr(new NoopAuthenticator());
   }
 };
 
 #endif  // !defined(NDEBUG)
 
 class HostProcess : public ConfigWatcher::Delegate,
                     public HostChangeNotificationListener::Listener,
                     public IPC::Listener,
                     public base::RefCountedThreadSafe<HostProcess> {
@@ skipping 1498 matching lines @@
       base::TimeDelta::FromSeconds(kShutdownTimeoutSeconds));
   new HostProcess(std::move(context), &exit_code, &shutdown_watchdog);
 
   // Run the main (also UI) message loop until the host no longer needs it.
   message_loop.Run();
 
   return exit_code;
 }
 
 }  // namespace remoting