Make AppWindowWaiter a common test support

chrome/browser/chromeos/app_mode/kiosk_crash_restore_browsertest.cc

 // Copyright 2016 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 <memory>
 #include <string>
 
+#include "apps/test/app_window_waiter.h"
 #include "base/base64.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
 #include "chrome/browser/chromeos/app_mode/fake_cws.h"
 #include "chrome/browser/chromeos/app_mode/kiosk_app_manager.h"
-#include "chrome/browser/chromeos/login/test/app_window_waiter.h"
 #include "chrome/browser/chromeos/net/network_portal_detector_test_impl.h"
 #include "chrome/browser/chromeos/ownership/owner_settings_service_chromeos_factory.h"
 #include "chrome/browser/chromeos/policy/device_local_account.h"
 #include "chrome/browser/chromeos/policy/device_policy_builder.h"
 #include "chrome/browser/extensions/browsertest_util.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/in_process_browser_test.h"
@@ skipping 146 matching lines @@
 
 IN_PROC_BROWSER_TEST_F(KioskCrashRestoreTest, Basic) {
   ExtensionTestMessageListener launch_data_check_listener(
       "launchData.isKioskSession = true", false);
 
   Profile* const app_profile = ProfileManager::GetPrimaryUserProfile();
   ASSERT_TRUE(app_profile);
   extensions::AppWindowRegistry* const app_window_registry =
       extensions::AppWindowRegistry::Get(app_profile);
   extensions::AppWindow* const window =
-      AppWindowWaiter(app_window_registry, test_app_id()).Wait();
+      apps::AppWindowWaiter(app_window_registry, test_app_id()).Wait();
   ASSERT_TRUE(window);
 
   window->GetBaseWindow()->Close();
 
   // Wait until the app terminates if it is still running.
   if (!app_window_registry->GetAppWindowsForApp(test_app_id()).empty())
     base::RunLoop().Run();
 
   EXPECT_TRUE(launch_data_check_listener.was_satisfied());
 }
 
 }  // namespace chromeos