views: Extract SystemMenuModel from native_menu_win.*.

ui/views/controls/menu/native_menu_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 UI_VIEWS_CONTROLS_MENU_NATIVE_MENU_WIN_H_
 #define UI_VIEWS_CONTROLS_MENU_NATIVE_MENU_WIN_H_
 #pragma once
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
-#include "ui/base/models/simple_menu_model.h"
+#include "base/string16.h"
 #include "ui/views/controls/menu/menu_wrapper.h"
 #include "ui/views/views_export.h"
 
+namespace ui {
+class MenuModel;
+}
+
 namespace views {
 
 // A Windows implementation of MenuWrapper.
 // TODO(beng): rename to MenuWin once the old class is dead.
 class VIEWS_EXPORT NativeMenuWin : public MenuWrapper {
  public:
   // Construct a NativeMenuWin, with a model and delegate. If |system_menu_for|
   // is non-NULL, the NativeMenuWin wraps the system menu for that window.
   // The caller owns the model and the delegate.
   NativeMenuWin(ui::MenuModel* model, HWND system_menu_for);
@@ skipping 124 matching lines @@
   bool* destroyed_flag_;
 
   // Ugly: a static pointer to the instance of this class that currently
   // has a menu open, because our hook function that receives keyboard
   // events doesn't have a mechanism to get a user data pointer.
   static NativeMenuWin* open_native_menu_win_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeMenuWin);
 };
 
-// A SimpleMenuModel subclass that allows the system menu for a window to be
-// wrapped.
-class VIEWS_EXPORT SystemMenuModel : public ui::SimpleMenuModel {
- public:
-  explicit SystemMenuModel(Delegate* delegate);
-  virtual ~SystemMenuModel();
-
-  // Overridden from ui::MenuModel:
-  virtual int GetFirstItemIndex(gfx::NativeMenu native_menu) const;
-
- protected:
-  // Overridden from SimpleMenuModel:
-  virtual int FlipIndex(int index) const { return GetItemCount() - index - 1; }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(SystemMenuModel);
-};
-
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MENU_NATIVE_MENU_WIN_H_