[win] Add a progress bar in the app launcher for app installs.

ui/app_list/app_list_item_model.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 UI_APP_LIST_APP_LIST_ITEM_MODEL_H_
 #define UI_APP_LIST_APP_LIST_ITEM_MODEL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 18 matching lines @@
 
   void SetIcon(const gfx::ImageSkia& icon);
   const gfx::ImageSkia& icon() const { return icon_; }
 
   void SetTitle(const std::string& title);
   const std::string& title() const { return title_; }
 
   void SetHighlighted(bool highlighted);
   bool highlighted() const { return highlighted_; }
 
+  void SetIsInstalling(bool is_installing);
+  virtual bool is_installing() const { return is_installing_; }
+
+  void SetPercentDownloaded(int percent_downloaded);
+  virtual int percent_downloaded() const { return percent_downloaded_; }
+
   void AddObserver(AppListItemModelObserver* observer);
   void RemoveObserver(AppListItemModelObserver* observer);
 
   // Returns the context menu model for this item.
   // Note the returned menu model is owned by this item.
   virtual ui::MenuModel* GetContextMenuModel();
 
  private:
   gfx::ImageSkia icon_;
   std::string title_;
   bool highlighted_;
+  bool is_installing_;
+  int percent_downloaded_;
 
   ObserverList<AppListItemModelObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListItemModel);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_APP_LIST_ITEM_MODEL_H_