Create a mirror window.

ash/display/mirror_window_controller.h

Index: ash/display/mirror_window_controller.h
diff --git a/ash/display/mirror_window_controller.h b/ash/display/mirror_window_controller.h
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+// Copyright (c) 2013 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 ASH_DISPLAY_MIRROR_WINDOW_CONTROLLER_H_
+#define ASH_DISPLAY_MIRROR_WINDOW_CONTROLLER_H_
+
+#include "ash/ash_export.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/gfx/point.h"
+
+namespace aura {
+class RootWindow;
+class Window;
+}
+
+namespace ash {
+namespace test{
+class MirrorWindowTestApi;
+}
+
+namespace internal {
+class DisplayInfo;
+class CursorWindowDelegate;
+
+// An object that copies the content of the primary root window to a
+// mirror window. This also draws a mouse cursor as the mouse cursor
+// is typically drawn by the window system.
+class MirrorWindowController {
+ public:
+  MirrorWindowController();
+  ~MirrorWindowController();
+
+  // Updates the root window's bounds using |display_info|.
+  // Creates the new root window if one doesn't exist.
+  void UpdateWindow(const DisplayInfo& display_info);
+
+  void Close();
+
+  // Updates the mirrored cursor location,shape and
+  // visibility.
+  void UpdateCursorLocation();
+  void SetMirroredCursor(gfx::NativeCursor cursor);
+  void SetMirroredCursorVisibility(bool visible);
+
+ private:
+  friend class test::MirrorWindowTestApi;
+
+  int current_cursor_type_;
+  aura::Window* cursor_window_;  // owned by root window.
+  scoped_ptr<aura::RootWindow> root_window_;
+  scoped_ptr<CursorWindowDelegate> cursor_window_delegate_;
+  gfx::Point hot_point_;
+
+  DISALLOW_COPY_AND_ASSIGN(MirrorWindowController);
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_DISPLAY_MIRROR_WINDOW_CONTROLLER_H_