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

chrome/browser/chromeos/login/proxy_auth_dialog_browsertest.cc

 // Copyright 2015 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 "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/login/login_manager_test.h"
@@ skipping 85 matching lines @@
 #if defined(MEMORY_SANITIZER) || defined(ADDRESS_SANITIZER)
 #define MAYBE_ProxyAuthDialogOnUserBoardScreen \
   DISABLED_ProxyAuthDialogOnUserBoardScreen
 #else
 #define MAYBE_ProxyAuthDialogOnUserBoardScreen ProxyAuthDialogOnUserBoardScreen
 #endif
 IN_PROC_BROWSER_TEST_F(ProxyAuthOnUserBoardScreenTest,
                        MAYBE_ProxyAuthDialogOnUserBoardScreen) {
   LoginDisplayHost* login_display_host = LoginDisplayHost::default_host();
   WebUILoginView* web_ui_login_view = login_display_host->GetWebUILoginView();
-  OobeUI* oobe_ui =
-      static_cast<OobeUI*>(web_ui_login_view->GetWebUI()->GetController());
+  OobeUI* oobe_ui = web_ui_login_view->GetOobeUI();
 
   {
     OobeScreenWaiter screen_waiter(OobeScreen::SCREEN_ACCOUNT_PICKER);
     ProxyAuthDialogWaiter auth_dialog_waiter;
     screen_waiter.Wait();
     auth_dialog_waiter.Wait();
 
     ASSERT_TRUE(auth_dialog_waiter.login_handler());
     auth_dialog_waiter.login_handler()->CancelAuth();
   }
 
   {
     OobeScreenWaiter screen_waiter(OobeScreen::SCREEN_GAIA_SIGNIN);
     ProxyAuthDialogWaiter auth_dialog_waiter;
     ASSERT_TRUE(content::ExecuteScript(oobe_ui->web_ui()->GetWebContents(),
                                        "window.domAutomationController.send(!!("
                                        "$('add-user-button').click()"
                                        "));"));
     screen_waiter.Wait();
     auth_dialog_waiter.Wait();
     ASSERT_TRUE(auth_dialog_waiter.login_handler());
   }
 }
 
 }  // namespace chromeos