cros: Replace WizardController string constants with OobeScreen values.

chrome/browser/chromeos/login/screens/update_screen.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/chromeos/login/screens/update_screen.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
@@ skipping 86 matching lines @@
 // static
 bool UpdateScreen::HasInstance(UpdateScreen* inst) {
   InstanceSet& instance_set = GetInstanceSet();
   InstanceSet::iterator found = instance_set.find(inst);
   return (found != instance_set.end());
 }
 
 // static
 UpdateScreen* UpdateScreen::Get(ScreenManager* manager) {
   return static_cast<UpdateScreen*>(
-      manager->GetScreen(WizardController::kUpdateScreenName));
+      manager->GetScreen(OobeScreen::SCREEN_OOBE_UPDATE));
 }
 
 UpdateScreen::UpdateScreen(BaseScreenDelegate* base_screen_delegate,
                            UpdateView* view,
                            HostPairingController* remora_controller)
     : UpdateModel(base_screen_delegate),
       state_(STATE_IDLE),
       reboot_check_delay_(kWaitForRebootTimeSec),
       is_checking_for_update_(true),
       is_downloading_update_(false),
@@ skipping 477 matching lines @@
 }
 
 void UpdateScreen::OnConnectRequested() {
   if (state_ == STATE_ERROR) {
     LOG(WARNING) << "Hiding error message since AP was reselected";
     StartUpdateCheck();
   }
 }
 
 }  // namespace chromeos