Use ChannelMojo between the remoting 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 <stdint.h>
 
 #include "base/memory/shared_memory_handle.h"
+#include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_platform_file.h"
 #include "remoting/host/chromoting_param_traits.h"
 #include "remoting/host/screen_resolution.h"
 #include "remoting/protocol/errors.h"
 #include "remoting/protocol/transport.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_capturer.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
 
 #endif  // REMOTING_HOST_CHROMOTING_MESSAGES_H_
 
@@ skipping 25 matching lines @@
 IPC_MESSAGE_CONTROL2(ChromotingDaemonNetworkMsg_InitializePairingRegistry,
                      IPC::PlatformFileForTransit /* privileged_key */,
                      IPC::PlatformFileForTransit /* unprivileged_key */)
 
 // 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

[joedow, 2016/10/31 16:41:03]

Remove |desktop_process| comment since the parameter was removed.

[Sam McNally, 2016/10/31 22:34:27]

Done.

 // 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,
+IPC_MESSAGE_CONTROL2(ChromotingDaemonNetworkMsg_DesktopAttached,
                      int /* terminal_id */,
-                     base::ProcessHandle /* desktop_process */,
-                     IPC::PlatformFileForTransit /* desktop_pipe */)
+                     IPC::ChannelHandle /* desktop_pipe */)
 
 //-----------------------------------------------------------------------------
 // Chromoting messages sent from the network to the daemon process.
 
 // Connects the terminal |terminal_id| (i.e. a remote client) to a desktop
 // session.
 IPC_MESSAGE_CONTROL3(ChromotingNetworkHostMsg_ConnectTerminal,
                      int /* terminal_id */,
                      remoting::ScreenResolution /* resolution */,
                      bool /* virtual_terminal */)
@@ skipping 43 matching lines @@
                      std::string /* xmpp_login */)
 
 IPC_MESSAGE_CONTROL0(ChromotingNetworkDaemonMsg_HostShutdown)
 
 //-----------------------------------------------------------------------------
 // Chromoting messages sent from the desktop to the daemon process.
 
 // Notifies the daemon that a desktop integration process has been initialized.
 // |desktop_pipe| specifies the client end of the desktop pipe. It is to be
 // forwarded to the desktop environment stub.
-//
-// Windows only: |desktop_pipe| has to be duplicated from the desktop process by
-// the receiver of the message.
 IPC_MESSAGE_CONTROL1(ChromotingDesktopDaemonMsg_DesktopAttached,
-                     IPC::PlatformFileForTransit /* desktop_pipe */)
+                     IPC::ChannelHandle /* desktop_pipe */)
 
 // Asks the daemon to inject Secure Attention Sequence (SAS) in the session
 // where the desktop process is running.
 IPC_MESSAGE_CONTROL0(ChromotingDesktopDaemonMsg_InjectSas)
 
 //-----------------------------------------------------------------------------
 // Chromoting messages sent from the desktop to the network process.
 
 // Notifies the network process that a shared buffer has been created.
 IPC_MESSAGE_CONTROL3(ChromotingDesktopNetworkMsg_CreateSharedBuffer,
@@ skipping 124 matching lines @@
 
 // The IPC channel path for this remote_security_key connection.  This message
 // is sent from the well-known IPC server channel.
 IPC_MESSAGE_CONTROL1(ChromotingNetworkToRemoteSecurityKeyMsg_ConnectionDetails,
                      std::string /* IPC Server path */)
 
 // The array of bytes representing a security key response from the remote
 // client.  This message is sent over the per-client IPC channel.
 IPC_MESSAGE_CONTROL1(ChromotingNetworkToRemoteSecurityKeyMsg_Response,
                      std::string /* response bytes */)