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diff --git a/remoting/host/wts_console_observer_win.h b/remoting/host/wts_console_observer_win.h
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+++ b/remoting/host/wts_console_observer_win.h
@@ -0,0 +1,34 @@
+// 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_wts_console_observer_win_H_
+#define REMOTING_HOST_wts_console_observer_win_H_
+
+#include <windows.h>
+
+#include "base/basictypes.h"
+
+namespace remoting {
+
+// Provides callbacks for monitoring events on a WTS terminal.
+class WtsConsoleObserver {
+ public:
+  virtual ~WtsConsoleObserver() {}
+
+  // Called when |session_id| attaches to the console.
+  virtual void OnSessionAttached(uint32 session_id) = 0;
+
+  // Called when a session detaches from the console.
+  virtual void OnSessionDetached() = 0;
+
+ protected:
+  WtsConsoleObserver() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(WtsConsoleObserver);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_HOST_wts_console_observer_win_H_