Add Wallpaper option to launcher context menu

ash/shell_context_menu.h

-// Copyright (c) 2012 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_SHELL_CONTEXT_MENU_H_
-#define ASH_SHELL_CONTEXT_MENU_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "ui/base/models/simple_menu_model.h"
-
-namespace gfx {
-class Point;
-class Size;
-}
-
-namespace views {
-class MenuRunner;
-class Widget;
-}
-
-namespace ash {
-namespace internal {
-
-class ShellContextMenu : public ui::SimpleMenuModel::Delegate {
- public:
-  ShellContextMenu();
-  virtual ~ShellContextMenu();
-
-  // Shows the context menu when right click on background.
-  void ShowMenu(views::Widget* widget, const gfx::Point& location);
-
-  // ui::SimpleMenuModel::Delegate overrides:
-  virtual bool IsCommandIdChecked(int command_id) const OVERRIDE;
-  virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE;
-  virtual void ExecuteCommand(int command_id) OVERRIDE;
-  virtual bool GetAcceleratorForCommandId(
-      int command_id,
-      ui::Accelerator* accelerator) OVERRIDE;
-
- private:
-  enum MenuItem {
-    MENU_CHANGE_WALLPAPER,
-  };
-
-  scoped_ptr<views::MenuRunner> menu_runner_;
-
-  DISALLOW_COPY_AND_ASSIGN(ShellContextMenu);
-};
-
-}  // namespace internal
-}  // namespace ash
-
-#endif  // ASH_SHELL_CONTEXT_MENU_H_