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

ui/app_list/views/app_list_item_view.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_VIEWS_APP_LIST_ITEM_VIEW_H_
 #define UI_APP_LIST_VIEWS_APP_LIST_ITEM_VIEW_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
@@ skipping 46 matching lines @@
   // Sets |touch_dragging_| flag and updates UI.
   void SetTouchDragging(bool touch_dragging);
 
   // Invoked when |mouse_drag_timer_| fires to show dragging UI.
   void OnMouseDragTimer();
 
   // AppListItemModelObserver overrides:
   virtual void ItemIconChanged() OVERRIDE;
   virtual void ItemTitleChanged() OVERRIDE;
   virtual void ItemHighlightedChanged() OVERRIDE;
+  virtual void ItemIsInstallingChanged() OVERRIDE;
+  virtual void ItemPercentDownloadedChanged() OVERRIDE;
 
   // views::View overrides:
   virtual std::string GetClassName() const OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
 
   // views::ContextMenuController overrides:
   virtual void ShowContextMenuForView(views::View* source,
                                       const gfx::Point& point) OVERRIDE;
@@ skipping 30 matching lines @@
 
   // A timer to defer showing drag UI when mouse is pressed.
   base::OneShotTimer<AppListItemView> mouse_drag_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListItemView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_APP_LIST_ITEM_VIEW_H_