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

aura/desktop.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_H_
+#define AURA_DESKTOP_H_
+#pragma once
+
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+#include "ui/gfx/native_widget_types.h"
+
+namespace gfx {
+class Size;
+}
+
+namespace ui {
+class Compositor;
+class Window;
+}
+
+namespace aura {
+
+// Desktop is responsible for hosting a set of windows.
+class Desktop {
+ public:
+  Desktop(gfx::AcceleratedWidget widget, const gfx::Size& size);
+  ~Desktop();
+
+  // Draws the necessary set of windows.
+  void Draw();
+
+  // Compositor we're drawing to.
+  ui::Compositor* compositor() { return compositor_.get(); }
+
+ private:
+  friend class Window;
+
+  typedef std::vector<Window*> Windows;
+
+  // Methods invoked by Window.
+  // TODO: move these into an interface that Window uses to talk to Desktop.
+  void AddWindow(Window* window);
+  void RemoveWindow(Window* window);
+
+  scoped_refptr<ui::Compositor> compositor_;
+
+  // The windows. Topmost window is last.
+  std::vector<Window*> windows_;
+
+  DISALLOW_COPY_AND_ASSIGN(Desktop);
+};
+
+}  // namespace aura
+
+#endif  // AURA_DESKTOP_H_