Migrate call sites LoginDisplayHostImpl::default_host to LoginDisplayHost.

chrome/browser/chromeos/login/enterprise_enrollment_browsertest.cc

 // Copyright (c) 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/macros.h"
 #include "chrome/browser/chromeos/login/enrollment/enrollment_screen.h"
 #include "chrome/browser/chromeos/login/enrollment/enterprise_enrollment_helper.h"
 #include "chrome/browser/chromeos/login/enrollment/enterprise_enrollment_helper_impl.h"
 #include "chrome/browser/chromeos/login/enrollment/enterprise_enrollment_helper_mock.h"
 #include "chrome/browser/chromeos/login/login_manager_test.h"
 #include "chrome/browser/chromeos/login/startup_utils.h"
 #include "chrome/browser/chromeos/login/test/js_checker.h"
 #include "chrome/browser/chromeos/login/test/oobe_screen_waiter.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/chromeos/policy/enrollment_status_chromeos.h"
 #include "content/public/test/test_utils.h"
 
 using testing::_;
 using testing::Invoke;
 using testing::InvokeWithoutArgs;
 
 namespace chromeos {
 
@@ skipping 106 matching lines @@
   bool IsStepDisplayed(const std::string& step) {
     const std::string js =
         "document.getElementsByClassName('oauth-enroll-state-" + step +
         "').length";
     int count = js_checker().GetInt(js);
     return count > 0;
   }
 
   // Setup the enrollment screen.
   void ShowEnrollmentScreen() {
-    LoginDisplayHost* host = LoginDisplayHostImpl::default_host();
+    LoginDisplayHost* host = LoginDisplayHost::default_host();
     ASSERT_TRUE(host != nullptr);
     host->StartWizard(WizardController::kEnrollmentScreenName);
     OobeScreenWaiter(OobeDisplay::SCREEN_OOBE_ENROLLMENT).Wait();
     ASSERT_TRUE(enrollment_screen() != nullptr);
     ASSERT_TRUE(WizardController::default_controller() != nullptr);
     ASSERT_FALSE(StartupUtils::IsOobeCompleted());
   }
 
   // Helper method to return the current EnrollmentScreen instance.
   EnrollmentScreen* enrollment_screen() {
@@ skipping 70 matching lines @@
   EXPECT_FALSE(IsStepDisplayed("success"));
   EXPECT_FALSE(IsStepDisplayed("error"));
 
   SubmitAttributePromptUpdate();
 
   // We have to remove the enrollment_helper before the dtor gets called.
   enrollment_screen()->enrollment_helper_.reset();
 }
 
 }  // namespace chromeos