ipc: Remove unnecessary attachment broker plumbing.

remoting/host/win/wts_session_process_delegate.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 the Windows service controlling Me2Me host processes
 // running within user sessions.
 
 #include "remoting/host/win/wts_session_process_delegate.h"
 
 #include "base/bind.h"
@@ skipping 366 matching lines @@
   if (!CreateIpcChannel(channel_name, channel_security_, &pipe)) {
     ReportFatalError();
     return;
   }
 
   // Wrap the pipe into an IPC channel.
   scoped_ptr<IPC::ChannelProxy> channel(
       IPC::ChannelProxy::Create(IPC::ChannelHandle(pipe.Get()),
                                 IPC::Channel::MODE_SERVER,
                                 this,
-                                io_task_runner_,
-                                nullptr));
+                                io_task_runner_));
 
   // Pass the name of the IPC channel to use.
   command_line.AppendSwitchNative(kDaemonPipeSwitchName,
                                   base::UTF8ToWide(channel_name));
 
   // Try to launch the process.
   ScopedHandle worker_process;
   ScopedHandle worker_thread;
   if (!LaunchProcessWithToken(command_line.GetProgram(),
                               command_line.GetCommandLineString(),
@@ skipping 161 matching lines @@
 
 void WtsSessionProcessDelegate::CloseChannel() {
   core_->CloseChannel();
 }
 
 void WtsSessionProcessDelegate::KillProcess() {
   core_->KillProcess();
 }
 
 }  // namespace remoting