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

chrome/browser/chromeos/login/lock/screen_locker_tester.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 "chrome/browser/chromeos/login/lock/screen_locker_tester.h"
 
 #include <string>
 
 #include "base/macros.h"
 #include "base/strings/string_util.h"
@@ skipping 161 matching lines @@
 views::Widget* WebUIScreenLockerTester::GetChildWidget() const {
   return webui_screen_locker()->lock_window_;
 }
 
 content::RenderViewHost* WebUIScreenLockerTester::RenderViewHost() const {
   return webui()->GetWebContents()->GetRenderViewHost();
 }
 
 WebUIScreenLocker* WebUIScreenLockerTester::webui_screen_locker() const {
   DCHECK(ScreenLocker::screen_locker_);
-  return static_cast<WebUIScreenLocker*>(
-      ScreenLocker::screen_locker_->delegate_.get());
+  return ScreenLocker::screen_locker_->web_ui();
 }
 
 content::WebUI* WebUIScreenLockerTester::webui() const {
   DCHECK(webui_screen_locker()->webui_ready_);
   content::WebUI* webui = webui_screen_locker()->GetWebUI();
   DCHECK(webui);
   return webui;
 }
 
 ScreenLockerTester::ScreenLockerTester() {
@@ skipping 16 matching lines @@
       new FakeExtendedAuthenticator(ScreenLocker::screen_locker_, user_context);
 }
 
 }  // namespace test
 
 test::ScreenLockerTester* ScreenLocker::GetTester() {
   return new test::WebUIScreenLockerTester();
 }
 
 }  // namespace chromeos