Pass the desktop session ID to the remoting network process.

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"
@@ skipping 36 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_pipe| is the client end of the
-// desktop-to-network pipe opened.
-IPC_MESSAGE_CONTROL2(ChromotingDaemonNetworkMsg_DesktopAttached,
+// a desktop integration process. |session_id| is the id of the desktop session
+// being attached. |desktop_pipe| is the client end of the desktop-to-network
+// pipe opened.
+IPC_MESSAGE_CONTROL3(ChromotingDaemonNetworkMsg_DesktopAttached,
                      int /* terminal_id */,
+                     int /* session_id */,
                      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 */,
@@ skipping 190 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 */)