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

remoting/protocol/host_message_dispatcher.cc

 // Copyright (c) 2011 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 "base/memory/ref_counted.h"
 #include "net/base/io_buffer.h"
 #include "remoting/proto/control.pb.h"
 #include "remoting/proto/event.pb.h"
 #include "remoting/proto/internal.pb.h"
 #include "remoting/protocol/connection_to_client.h"
@@ skipping 36 matching lines @@
       base::Bind(&HostMessageDispatcher::OnEventMessageReceived,
                  base::Unretained(this)));
   control_message_reader_->Init(
       connection->session()->control_channel(),
       base::Bind(&HostMessageDispatcher::OnControlMessageReceived,
                  base::Unretained(this)));
 }
 
 void HostMessageDispatcher::OnControlMessageReceived(
     ControlMessage* message, const base::Closure& done_task) {
-  if (message->has_begin_session_request()) {
-    const BeginSessionRequest& request = message->begin_session_request();
-    if (request.has_credentials() && request.credentials().has_type()) {
-      host_stub_->BeginSessionRequest(&request.credentials(), done_task);
-      return;
-    }
-  }
-
   LOG(WARNING) << "Invalid control message received.";
   done_task.Run();
 }
 
 void HostMessageDispatcher::OnEventMessageReceived(
     EventMessage* message, const base::Closure& done_task) {
   base::ScopedClosureRunner done_runner(done_task);
 
   connection_->UpdateSequenceNumber(message->sequence_number());
 
   if (message->has_key_event()) {
     const KeyEvent& event = message->key_event();
     if (event.has_keycode() && event.has_pressed()) {
       input_stub_->InjectKeyEvent(event);
       return;
     }
   } else if (message->has_mouse_event()) {
     input_stub_->InjectMouseEvent(message->mouse_event());
     return;
   }
 
   LOG(WARNING) << "Unknown event message received.";
 }
 
 }  // namespace protocol
 }  // namespace remoting