Remove old Authentication code that we don't use or need.

remoting/protocol/client_control_sender.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.
 
 // This stub is thread safe because of the use of BufferedSocketWriter.
 // BufferedSocketWriter buffers messages and send them on them right thread.
 
 #include "remoting/protocol/client_control_sender.h"
 
 #include "base/task.h"
 #include "remoting/protocol/buffered_socket_writer.h"
 #include "remoting/proto/control.pb.h"
 #include "remoting/proto/internal.pb.h"
 #include "remoting/protocol/util.h"
 
 namespace remoting {
 namespace protocol {
 
 ClientControlSender::ClientControlSender(base::MessageLoopProxy* message_loop,
                                          net::Socket* socket)
     : buffered_writer_(new BufferedSocketWriter(message_loop)) {
   buffered_writer_->Init(socket, BufferedSocketWriter::WriteFailedCallback());
+
+  // Write legacy BeginSession message.
+  protocol::ControlMessage message;
+  message.mutable_begin_session_deprecated()->mutable_login_status()->
+      set_success(true);
+  buffered_writer_->Write(SerializeAndFrameMessage(message), base::Closure());
 }
 
 ClientControlSender::~ClientControlSender() {
 }
 
-void ClientControlSender::BeginSessionResponse(const LocalLoginStatus* msg,
-                                               const base::Closure& done) {
-  protocol::ControlMessage message;
-  message.mutable_begin_session_response()->mutable_login_status()->
-      CopyFrom(*msg);
-  buffered_writer_->Write(SerializeAndFrameMessage(message), done);
-}
 
 void ClientControlSender::Close() {
   buffered_writer_->Close();
 }
 
 }  // namespace protocol
 }  // namespace remoting