app_sorting() calls should go via ExtensionSystem intsead of prefs.

chrome/browser/extensions/extension_install_ui_browsertest.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 "base/command_line.h"
 #include "base/strings/string_util.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 216 matching lines @@
   ui_test_utils::NavigateToURL(browser(), GURL(chrome::kChromeUINewTabURL));
   ExtensionService* service = extensions::ExtensionSystem::Get(
       browser()->profile())->extension_service();
   base::FilePath app_dir = test_data_dir_.AppendASCII("app");
   const std::string app_id = crx_file::id_util::GenerateIdForPath(app_dir);
 
   const extensions::Extension* webstore_extension =
       service->GetInstalledExtension(extensions::kWebStoreAppId);
   EXPECT_TRUE(webstore_extension);
   AppSorting* sorting =
-      extensions::ExtensionPrefs::Get(browser()->profile())->app_sorting();
+      extensions::ExtensionSystem::Get(browser()->profile())->app_sorting();
 
   // Register for notifications in the same way as AppLauncherHandler.
   registrar_.Add(this,
                  chrome::NOTIFICATION_APP_LAUNCHER_REORDERED,
                  content::Source<AppSorting>(sorting));
   // ExtensionAppItem calls this when an app install starts.
   sorting->EnsureValidOrdinals(app_id, syncer::StringOrdinal());
   // Vefify the app is not actually installed yet.
   EXPECT_FALSE(service->GetInstalledExtension(app_id));
   // Move the test app from the end to be before the web store.
   sorting->OnExtensionMoved(
       app_id, std::string(), extensions::kWebStoreAppId);
   EXPECT_EQ(app_id, last_reordered_extension_id_);
 
   // Now install the app.
   const extensions::Extension* test_app = LoadExtension(app_dir);
   ASSERT_TRUE(test_app);
   EXPECT_TRUE(service->GetInstalledExtension(app_id));
   EXPECT_EQ(app_id, test_app->id());
 }