Migrate call sites LoginDisplayHostImpl::default_host to LoginDisplayHost.

chrome/browser/chromeos/login/test/wizard_in_process_browser_test.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/test/wizard_in_process_browser_test.h"
 
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/login/login_wizard.h"
-#include "chrome/browser/chromeos/login/ui/login_display_host_impl.h"
+#include "chrome/browser/chromeos/login/ui/login_display_host.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/common/chrome_switches.h"
 #include "chromeos/chromeos_switches.h"
 #include "content/public/browser/notification_service.h"
 
 namespace chromeos {
 
 WizardInProcessBrowserTest::WizardInProcessBrowserTest(const char* screen_name)
     : screen_name_(screen_name),
       host_(NULL) {
 }
 
 void WizardInProcessBrowserTest::SetUp() {
   WizardController::SetZeroDelays();
   InProcessBrowserTest::SetUp();
 }
 
 void WizardInProcessBrowserTest::SetUpCommandLine(
     base::CommandLine* command_line) {
   command_line->AppendSwitch(::switches::kNoStartupWindow);
   command_line->AppendSwitch(switches::kLoginManager);
 }
 
 void WizardInProcessBrowserTest::SetUpOnMainThread() {
   SetUpWizard();
   if (!screen_name_.empty()) {
     ShowLoginWizard(screen_name_);
-    host_ = LoginDisplayHostImpl::default_host();
+    host_ = LoginDisplayHost::default_host();
   }
 }
 
 void WizardInProcessBrowserTest::TearDownOnMainThread() {
   // LoginDisplayHost owns controllers and all windows.
   base::MessageLoopForUI::current()->DeleteSoon(FROM_HERE, host_);
 
   base::MessageLoopForUI::current()->RunUntilIdle();
 }
 
 }  // namespace chromeos