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

remoting/host/chromoting_messages.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_CHROMOTING_MESSAGES_H_
 #define REMOTING_HOST_CHROMOTING_MESSAGES_H_
 
 #include "ipc/ipc_platform_file.h"
 #include "media/video/capture/screen/mouse_cursor_shape.h"
 #include "third_party/skia/include/core/SkPoint.h"
@@ skipping 22 matching lines @@
 // Delivers the host configuration (and updates) to the network process.
 IPC_MESSAGE_CONTROL1(ChromotingDaemonNetworkMsg_Configuration, std::string)
 
 // Notifies the network process that the terminal |terminal_id| has been
 // disconnected from the desktop session.
 IPC_MESSAGE_CONTROL1(ChromotingDaemonNetworkMsg_TerminalDisconnected,
                      int /* terminal_id */)
 
 // Notifies the network process that |terminal_id| is now attached to
 // a desktop integration process. |desktop_process| is the handle of the desktop
-// process |desktop_pipe| is the client end of the desktop-to-network pipe
+// process. |desktop_pipe| is the client end of the desktop-to-network pipe
 // opened.
 //
 // Windows only: |desktop_pipe| has to be duplicated from the desktop process
 // by the receiver of the message. |desktop_process| is already duplicated by
 // the sender.
 IPC_MESSAGE_CONTROL3(ChromotingDaemonNetworkMsg_DesktopAttached,
                      int /* terminal_id */,
-                     IPC::PlatformFileForTransit /* desktop_process */,
+                     base::ProcessHandle /* desktop_process */,
                      IPC::PlatformFileForTransit /* desktop_pipe */)
 
 //-----------------------------------------------------------------------------
 // Chromoting messages sent from the network to the daemon process.
 
 // Asks the daemon to send Secure Attention Sequence (SAS) to the current
 // console session.
 IPC_MESSAGE_CONTROL0(ChromotingNetworkDaemonMsg_SendSasToConsole)
 
 // Connects the terminal |terminal_id| (i.e. the remote client) to a desktop
@@ skipping 143 matching lines @@
 
 // Carries a keyboard event from the client to the desktop session agent.
 // |serialized_event| is a serialized protocol::KeyEvent.
 IPC_MESSAGE_CONTROL1(ChromotingNetworkDesktopMsg_InjectKeyEvent,
                      std::string /* serialized_event */ )
 
 // Carries a mouse event from the client to the desktop session agent.
 // |serialized_event| is a serialized protocol::MouseEvent.
 IPC_MESSAGE_CONTROL1(ChromotingNetworkDesktopMsg_InjectMouseEvent,
                      std::string /* serialized_event */ )