Migrate call sites LoginDisplayHostImpl::default_host to LoginDisplayHost.

chrome/browser/ui/webui/chromeos/mobile_setup_dialog.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 "chrome/browser/ui/webui/chromeos/mobile_setup_dialog.h"
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/singleton.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_shutdown.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/ui/webui_login_view.h"
 #include "chrome/browser/chromeos/mobile/mobile_activator.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/simple_message_box.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/generated_resources.h"
 #include "content/public/browser/browser_thread.h"
 #include "ui/base/l10n/l10n_util.h"
@@ skipping 54 matching lines @@
 
 MobileSetupDialogDelegate::MobileSetupDialogDelegate() : dialog_window_(NULL) {
 }
 
 MobileSetupDialogDelegate::~MobileSetupDialogDelegate() {
 }
 
 void MobileSetupDialogDelegate::ShowDialog(const std::string& service_path) {
   service_path_ = service_path;
 
   gfx::NativeWindow parent = NULL;

[achuithb, 2016/01/21 23:14:31]

nullptr since you're here

[jdufault, 2016/01/22 21:14:11]

Done.

   // If we're on the login screen.
-  if (chromeos::LoginDisplayHostImpl::default_host()) {
-    chromeos::LoginDisplayHostImpl* webui_host =
-        static_cast<chromeos::LoginDisplayHostImpl*>(
-            chromeos::LoginDisplayHostImpl::default_host());
-    chromeos::WebUILoginView* login_view = webui_host->GetWebUILoginView();
+  if (chromeos::LoginDisplayHost::default_host()) {
+    chromeos::WebUILoginView* login_view =
+        chromeos::LoginDisplayHost::default_host()->GetWebUILoginView();
     if (login_view)
       parent = login_view->GetNativeWindow();
   }
   // Only the primary user can change this.
   dialog_window_ = chrome::ShowWebDialog(
       parent,
       ProfileManager::GetPrimaryUserProfile(),
       this);
 }
 
@@ skipping 47 matching lines @@
 }
 
 bool MobileSetupDialogDelegate::ShouldShowDialogTitle() const {
   return true;
 }
 
 bool MobileSetupDialogDelegate::HandleContextMenu(
     const content::ContextMenuParams& params) {
   return true;
 }