[ash] Add TYPE_DIALOG and its item's LauncherContextMenu

ash/shelf/shelf_window_watcher_item_delegate.h

 // Copyright 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_SHELF_SHELF_WINDOW_WATCHER_ITEM_DELEGATE_H_
 #define ASH_SHELF_SHELF_WINDOW_WATCHER_ITEM_DELEGATE_H_
 
 #include "ash/shelf/shelf_item_delegate.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 
 namespace aura {
 class Window;
 }
 
 namespace ash {
+
+class ShelfModel;
+
 namespace internal {
 
 // ShelfItemDelegate for the items created by ShelfWindowWatcher.
 class ShelfWindowWatcherItemDelegate : public ShelfItemDelegate {
  public:
-  explicit ShelfWindowWatcherItemDelegate(aura::Window* window);
+  ShelfWindowWatcherItemDelegate(aura::Window* window, ShelfModel* model_);
 
   virtual ~ShelfWindowWatcherItemDelegate();
 
-  // Closes the window associated with this item.
-  void Close();
-
  private:
   // ShelfItemDelegate overrides:
   virtual bool ItemSelected(const ui::Event& event) OVERRIDE;
   virtual base::string16 GetTitle() OVERRIDE;
   virtual ui::MenuModel* CreateContextMenu(aura::Window* root_window) OVERRIDE;
   virtual ShelfMenuModel* CreateApplicationMenu(int event_flags) OVERRIDE;
   virtual bool IsDraggable() OVERRIDE;
   virtual bool ShouldShowTooltip() OVERRIDE;
+  virtual void Close() OVERRIDE;
 
   // Stores a Window associated with this item. Not owned.
   aura::Window* window_;
 
+  // Not owned.
+  ShelfModel* model_;
+
   DISALLOW_COPY_AND_ASSIGN(ShelfWindowWatcherItemDelegate);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_WINDOW_WATCHER_ITEM_DELEGATE_H_