Use app list item shadow for app list folders.

chrome/browser/ui/app_list/extension_app_item.cc

 // 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.
 
 #include "chrome/browser/ui/app_list/extension_app_item.h"
 
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_util.h"
 #include "chrome/browser/extensions/launch_util.h"
@@ skipping 178 matching lines @@
       icon = CreateDisabledIcon(icon);
 
     if (GetExtension()->from_bookmark())
       icon = gfx::ImageSkia(new RoundedCornersImageSource(icon), icon.size());
   }
   // Paint the shortcut overlay if necessary.
   has_overlay_ = NeedsOverlay();
   if (has_overlay_)
     icon = gfx::ImageSkia(new ShortcutOverlayImageSource(icon), icon.size());
 
-  SetIcon(icon, true);
+  SetIcon(icon);
 }
 
 void ExtensionAppItem::Move(const ExtensionAppItem* prev,
                             const ExtensionAppItem* next) {
   if (!prev && !next)
     return;  // No reordering necessary
 
   extensions::ExtensionPrefs* prefs = extensions::ExtensionPrefs::Get(profile_);
   extensions::AppSorting* sorting = GetAppSorting(profile_);
 
@@ skipping 144 matching lines @@
   const syncer::StringOrdinal& launch =
      GetAppSorting(profile_)->GetAppLaunchOrdinal(extension_id_);
   set_position(syncer::StringOrdinal(
       page.ToInternalValue() + launch.ToInternalValue()));
 }
 
 AppListControllerDelegate* ExtensionAppItem::GetController() {
   return AppListService::Get(chrome::GetActiveDesktop())->
       GetControllerDelegate();
 }