Use ChannelMojo between the remoting network and desktop processes.

remoting/host/desktop_session_win.h

Index: remoting/host/desktop_session_win.h
diff --git a/remoting/host/desktop_session_win.h b/remoting/host/desktop_session_win.h
index 1ff42c7f0fb6379b6e81460f9b97dd6e2e9c2492..1c58fa35e20c37c5e90d7fb53a791c0212402d14 100644
--- a/remoting/host/desktop_session_win.h
+++ b/remoting/host/desktop_session_win.h
@@ -14,7 +14,7 @@
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "base/win/scoped_handle.h"
-#include "ipc/ipc_platform_file.h"
+#include "ipc/ipc_channel_handle.h"
 #include "remoting/host/desktop_session.h"
 #include "remoting/host/win/wts_terminal_observer.h"
 #include "remoting/host/worker_process_ipc_delegate.h"
@@ -99,7 +99,7 @@ class DesktopSessionWin
 
  private:
   // ChromotingDesktopDaemonMsg_DesktopAttached handler.
-  void OnDesktopSessionAgentAttached(IPC::PlatformFileForTransit desktop_pipe);
+  void OnDesktopSessionAgentAttached(const IPC::ChannelHandle& desktop_pipe);
 
   // Requests the desktop process to crash.
   void CrashDesktopProcess(const tracked_objects::Location& location);