Use app list item shadow for app list folders.

ui/app_list/app_list_item.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 UI_APP_LIST_APP_LIST_ITEM_H_
 #define UI_APP_LIST_APP_LIST_ITEM_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 15 matching lines @@
 class AppListItemObserver;
 class AppListModel;
 
 // AppListItem provides icon and title to be shown in a AppListItemView
 // and action to be executed when the AppListItemView is activated.
 class APP_LIST_EXPORT AppListItem {
  public:
   explicit AppListItem(const std::string& id);
   virtual ~AppListItem();
 
-  void SetIcon(const gfx::ImageSkia& icon, bool has_shadow);
+  void SetIcon(const gfx::ImageSkia& icon);
   const gfx::ImageSkia& icon() const { return icon_; }
-  bool has_shadow() const { return has_shadow_; }
 
   const std::string& GetDisplayName() const {
     return short_name_.empty() ? name_ : short_name_;
   }
 
   const std::string& name() const { return name_; }
   // Should only be used in tests; otheriwse use GetDisplayName().
   const std::string& short_name() const { return short_name_; }
 
   void set_highlighted(bool highlighted) { highlighted_ = highlighted; }
@@ skipping 65 matching lines @@
 
   void set_folder_id(const std::string& folder_id) { folder_id_ = folder_id; }
 
  private:
   friend class AppListModelTest;
 
   const std::string id_;
   std::string folder_id_;  // Id of containing folder; empty if top level item.
   syncer::StringOrdinal position_;
   gfx::ImageSkia icon_;
-  bool has_shadow_;
 
   // The full name of an item. Used for display if |short_name_| is empty.
   std::string name_;
 
   // A shortened name for the item, used for display.
   std::string short_name_;
 
   bool highlighted_;
   bool is_installing_;
   int percent_downloaded_;
 
   ObserverList<AppListItemObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListItem);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_APP_LIST_ITEM_H_