Migrate call sites LoginDisplayHostImpl::default_host to LoginDisplayHost.

chrome/browser/chromeos/login/login_browsertest.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 "ash/shell.h"
 #include "ash/system/tray/system_tray.h"
 #include "base/command_line.h"
 #include "base/strings/string_util.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/login/login_manager_test.h"
@@ skipping 210 matching lines @@
   // Login screen needs to be shown explicitly when running test.
   ShowLoginWizard(WizardController::kLoginScreenName);
 
   // Cursor should be hidden at startup
   EXPECT_FALSE(ash::Shell::GetInstance()->cursor_manager()->IsCursorVisible());
 
   // Cursor should be shown after cursor is moved.
   EXPECT_TRUE(ui_test_utils::SendMouseMoveSync(gfx::Point()));
   EXPECT_TRUE(ash::Shell::GetInstance()->cursor_manager()->IsCursorVisible());
 
-  base::MessageLoop::current()->DeleteSoon(
-      FROM_HERE, LoginDisplayHostImpl::default_host());
+  base::MessageLoop::current()->DeleteSoon(FROM_HERE,
+                                           LoginDisplayHost::default_host());
 
   TestSystemTrayIsVisible();
 }
 
 // Verifies that the webui for login comes up successfully.
 IN_PROC_BROWSER_TEST_F(LoginSigninTest, WebUIVisible) {
   base::TimeDelta no_timeout;
   EXPECT_TRUE(tracing::WaitForWatchEvent(no_timeout));
   std::string json_events;
   ASSERT_TRUE(tracing::EndTracing(&json_events));
@@ skipping 11 matching lines @@
   content::WindowedNotificationObserver session_start_waiter(
       chrome::NOTIFICATION_SESSION_STARTED,
       content::NotificationService::AllSources());
   SubmitGaiaAuthOfflineForm(kTestUser, kPassword);
   session_start_waiter.Wait();
 
   TestSystemTrayIsVisible();
 }
 
 }  // namespace chromeos