cros: Cleanup lock screen and OOBE C++ backing code.

chrome/browser/ui/webui/chromeos/login/network_screen_handler.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/webui/chromeos/login/network_screen_handler.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 121 matching lines @@
   core_oobe_actor_->StopDemoModeDetection();
 }
 
 void NetworkScreenHandler::ShowConnectingStatus(
     bool connecting,
     const base::string16& network_id) {
 }
 
 void NetworkScreenHandler::ReloadLocalizedContent() {
   base::DictionaryValue localized_strings;
-  static_cast<OobeUI*>(web_ui()->GetController())
-      ->GetLocalizedStrings(&localized_strings);
+  GetOobeUI()->GetLocalizedStrings(&localized_strings);
   core_oobe_actor_->ReloadContent(localized_strings);
 }
 
 // NetworkScreenHandler, BaseScreenHandler implementation: --------------------
 
 void NetworkScreenHandler::DeclareLocalizedValues(
     ::login::LocalizedValuesBuilder* builder) {
   if (system::InputDeviceSettings::Get()->ForceKeyboardDrivenUINavigation())
     builder->Add("networkScreenGreeting", IDS_REMORA_CONFIRM_MESSAGE);
   else
@@ skipping 133 matching lines @@
     timezone_option->SetString("value", timezone_id);
     timezone_option->SetString("title", timezone_name);
     timezone_option->SetBoolean("selected", timezone_id == current_timezone_id);
     timezone_list->Append(std::move(timezone_option));
   }
 
   return timezone_list.release();
 }
 
 }  // namespace chromeos