Refactors building the system menu model into a common place

chrome/browser/ui/views/frame/system_menu_model_builder.h

+// 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 CHROME_BROWSER_UI_VIEWS_FRAME_SYSTEM_MENU_MODEL_BUILDER_H_
+#define CHROME_BROWSER_UI_VIEWS_FRAME_SYSTEM_MENU_MODEL_BUILDER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/ui/views/frame/system_menu_model_delegate.h"
+
+class Browser;
+class EncodingMenuModel;
+class ZoomMenuModel;
+
+namespace ui {
+class AcceleratorProvider;
+class MenuModel;
+class SimpleMenuModel;
+}
+
+// SystemMenuModelBuilder is responsible for building and owning the system menu
+// model.
+class SystemMenuModelBuilder {
+ public:
+  SystemMenuModelBuilder(ui::AcceleratorProvider* provider, Browser* browser);
+  ~SystemMenuModelBuilder();
+
+  // Populates the menu.
+  void Init();
+
+  // Returns the menu model. SystemMenuModelBuilder owns the returned model.
+  ui::MenuModel* menu_model() { return menu_model_.get(); }
+
+ private:
+  Browser* browser() { return menu_delegate_.browser(); }
+
+  // Creates and returns the MenuModel. This does not populate the menu.
+  // |needs_trailing_separator| is set to true if the menu needs a separator
+  // after all items have been added.
+  ui::SimpleMenuModel* CreateMenuModel(bool* needs_trailing_separator);
+
+  // Populates |model| with the appropriate contents.
+  void BuildMenu(ui::SimpleMenuModel* model);
+  void BuildSystemMenuForBrowserWindow(ui::SimpleMenuModel* model);
+  void BuildSystemMenuForAppOrPopupWindow(ui::SimpleMenuModel* model);
+
+  // Adds items for toggling the frame type (if necessary).
+  void AddFrameToggleItems(ui::SimpleMenuModel* model);
+
+  SystemMenuModelDelegate menu_delegate_;
+  scoped_ptr<ui::MenuModel> menu_model_;
+  scoped_ptr<ZoomMenuModel> zoom_menu_contents_;
+  scoped_ptr<EncodingMenuModel> encoding_menu_contents_;
+
+  DISALLOW_COPY_AND_ASSIGN(SystemMenuModelBuilder);
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_FRAME_SYSTEM_MENU_MODEL_BUILDER_H_