Use app list item shadow for app list folders.

ui/app_list/app_list_item.cc

 // 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.
 
 #include "ui/app_list/app_list_item.h"
 
 #include "base/logging.h"
 #include "ui/app_list/app_list_item_observer.h"
 
 namespace app_list {
 
 AppListItem::AppListItem(const std::string& id)
     : id_(id),
-      has_shadow_(false),
       highlighted_(false),
       is_installing_(false),
       percent_downloaded_(-1) {
 }
 
 AppListItem::~AppListItem() {
   FOR_EACH_OBSERVER(AppListItemObserver, observers_, ItemBeingDestroyed());
 }
 
-void AppListItem::SetIcon(const gfx::ImageSkia& icon, bool has_shadow) {
+void AppListItem::SetIcon(const gfx::ImageSkia& icon) {
   icon_ = icon;
-  has_shadow_ = has_shadow;
   FOR_EACH_OBSERVER(AppListItemObserver, observers_, ItemIconChanged());
 }
 
 void AppListItem::SetIsInstalling(bool is_installing) {
   if (is_installing_ == is_installing)
     return;
 
   is_installing_ = is_installing;
   FOR_EACH_OBSERVER(AppListItemObserver,
                     observers_,
@@ skipping 67 matching lines @@
 void AppListItem::SetNameAndShortName(const std::string& name,
                                       const std::string& short_name) {
   if (name_ == name && short_name_ == short_name)
     return;
   name_ = name;
   short_name_ = short_name;
   FOR_EACH_OBSERVER(AppListItemObserver, observers_, ItemNameChanged());
 }
 
 }  // namespace app_list