Shell of implementation for embedded windows. At this point this is

aura/desktop_host_win.h

+// Copyright (c) 2011 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 AURA_DESKTOP_HOST_WIN_H_
+#define AURA_DESKTOP_HOST_WIN_H_
+#pragma once
+
+#include "aura/desktop_host.h"
+#include "base/compiler_specific.h"
+#include "ui/base/win/window_impl.h"
+
+namespace aura {
+
+class DesktopHostWin : public DesktopHost, public ui::WindowImpl {
+ public:
+  DesktopHostWin(const gfx::Rect& bounds);
+  virtual ~DesktopHostWin();
+
+  // DesktopHost:
+  virtual void SetDesktop(Desktop* desktop) OVERRIDE;
+  virtual gfx::AcceleratedWidget GetAcceleratedWidget() OVERRIDE;
+  virtual void Show() OVERRIDE;
+  virtual gfx::Size GetSize() OVERRIDE;
+
+ private:
+  BEGIN_MSG_MAP_EX(DesktopHostWin)
+    MSG_WM_CLOSE(OnClose)
+    MSG_WM_PAINT(OnPaint)
+  END_MSG_MAP()
+
+  void OnClose();
+  void OnPaint(HDC dc);
+
+  Desktop* desktop_;
+
+  DISALLOW_COPY_AND_ASSIGN(DesktopHostWin);
+};
+
+}  // namespace aura
+
+#endif  // AURA_DESKTOP_HOST_WIN_H_