Adding a unit test to verify the IPC channel between the network and desktop processes.

remoting/host/desktop_session_agent.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_HOST_DESKTOP_SESSION_AGENT_H_
 #define REMOTING_HOST_DESKTOP_SESSION_AGENT_H_
 
 #include <list>
 
 #include "base/basictypes.h"
@@ skipping 165 matching lines @@
 
   scoped_refptr<AutoThreadTaskRunner> video_capture_task_runner() const {
     return video_capture_task_runner_;
   }
 
   const base::WeakPtr<Delegate>& delegate() const {
     return delegate_;
   }
 
  private:
+  // Closes |desktop_pipe_| if it is open.
+  void CloseDesktopPipeHandle();
+
   // Task runner dedicated to running methods of |audio_capturer_|.
   scoped_refptr<AutoThreadTaskRunner> audio_capture_task_runner_;
 
   // Task runner on which public methods of this class should be called.
   scoped_refptr<AutoThreadTaskRunner> caller_task_runner_;
 
   // Task runner on which keyboard/mouse input is injected.
   scoped_refptr<AutoThreadTaskRunner> input_task_runner_;
 
   // Task runner used by the IPC channel.
@@ skipping 19 matching lines @@
 
   // Tracker used to release pressed keys and buttons when disconnecting.
   scoped_ptr<protocol::InputEventTracker> input_tracker_;
 
   // Filter used to disable remote inputs during local input activity.
   scoped_ptr<RemoteInputFilter> remote_input_filter_;
 
   // IPC channel connecting the desktop process with the network process.
   scoped_ptr<IPC::ChannelProxy> network_channel_;
 
+  // The client end of the network-to-desktop pipe. It is kept alive until
+  // the network process connects to the pipe.
+  IPC::PlatformFileForTransit desktop_pipe_;
+
   // Size of the most recent captured video frame.
   SkISize current_size_;
 
   // Next shared buffer ID to be used.
   int next_shared_buffer_id_;
 
   // List of the shared buffers.
   typedef std::list<scoped_refptr<media::SharedBuffer> > SharedBuffers;
   SharedBuffers shared_buffers_;
 
   // True if the desktop session agent has been started.
   bool started_;
 
   // Captures the screen.
   scoped_ptr<media::ScreenCapturer> video_capturer_;
 
   UiStrings ui_strings_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopSessionAgent);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_DESKTOP_SESSION_AGENT_H_