cros: Use ScreenManager as a component instead of deriving WizardController from it

chrome/browser/chromeos/login/oobe_localization_browsertest.cc

 // Copyright 2014 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 <stddef.h>
 
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
@@ skipping 76 matching lines @@
   const base::TimeDelta timeout_;
   const std::string message_;
   base::RunLoop loop_;
 
   DISALLOW_COPY_AND_ASSIGN(TimedRunLoop);
 };
 
 class LanguageListWaiter : public NetworkScreen::Observer {
  public:
   LanguageListWaiter()
-      : network_screen_(
-            NetworkScreen::Get(WizardController::default_controller())),
+      : network_screen_(NetworkScreen::Get(
+            WizardController::default_controller()->screen_manager())),
         loop_(base::TimeDelta::FromSeconds(kTimeoutSeconds), "LanguageList") {
     network_screen_->AddObserver(this);
     CheckLanguageList();
   }
 
   ~LanguageListWaiter() override { network_screen_->RemoveObserver(this); }
 
   // NetworkScreen::Observer implementation:
   void OnLanguageListReloaded() override { CheckLanguageList(); }
 
@@ skipping 318 matching lines @@
   RunLocalizationTest();
 }
 
 INSTANTIATE_TEST_CASE_P(
     StructSequence,
     OobeLocalizationTest,
     testing::Range(&oobe_localization_test_parameters[0],
                    &oobe_localization_test_parameters[arraysize(
                        oobe_localization_test_parameters)]));
 }  // namespace chromeos