Added support of Secure Attention Sequence in multiprocess mode.

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 a8b35d534811ae4e7e0097ab63f1ea321d83445b..89343c9f286e845f43f24d7c5670b8aa339d201b 100644
--- a/remoting/host/desktop_session_win.h
+++ b/remoting/host/desktop_session_win.h
@@ -22,6 +22,7 @@ namespace remoting {
 
 class AutoThreadTaskRunner;
 class DaemonProcess;
+class SasInjector;
 class WorkerProcessLauncher;
 class WtsConsoleMonitor;
 
@@ -60,6 +61,9 @@ class DesktopSessionWin
   // ChromotingDesktopDaemonMsg_DesktopAttached handler.
   void OnDesktopSessionAgentAttached(IPC::PlatformFileForTransit desktop_pipe);
 
+  // ChromotingDesktopDaemonMsg_InjectSas handler.
+  void OnInjectSas();
+
   // Restarts the desktop process.
   void RestartDesktopProcess(const tracked_objects::Location& location);
 
@@ -81,6 +85,8 @@ class DesktopSessionWin
   // Pointer used to unsubscribe from session attach and detach events.
   WtsConsoleMonitor* monitor_;
 
+  scoped_ptr<SasInjector> sas_injector_;
+
   DISALLOW_COPY_AND_ASSIGN(DesktopSessionWin);
 };