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 45 matching lines @@
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   MobileSetupDialogDelegate::GetInstance()->ShowDialog(service_path);
 }
 
 // static
 MobileSetupDialogDelegate* MobileSetupDialogDelegate::GetInstance() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   return base::Singleton<MobileSetupDialogDelegate>::get();
 }
 
-MobileSetupDialogDelegate::MobileSetupDialogDelegate() : dialog_window_(NULL) {
-}
+MobileSetupDialogDelegate::MobileSetupDialogDelegate()
+    : dialog_window_(nullptr) {}
 
 MobileSetupDialogDelegate::~MobileSetupDialogDelegate() {
 }
 
 void MobileSetupDialogDelegate::ShowDialog(const std::string& service_path) {
   service_path_ = service_path;
 
-  gfx::NativeWindow parent = NULL;
+  gfx::NativeWindow parent = nullptr;
   // 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 17 matching lines @@
 
 void MobileSetupDialogDelegate::GetDialogSize(gfx::Size* size) const {
   size->SetSize(850, 650);
 }
 
 std::string MobileSetupDialogDelegate::GetDialogArgs() const {
   return std::string();
 }
 
 void MobileSetupDialogDelegate::OnDialogClosed(const std::string& json_retval) {
-  dialog_window_ = NULL;
+  dialog_window_ = nullptr;
 }
 
 void MobileSetupDialogDelegate::OnCloseContents(WebContents* source,
                                                 bool* out_close_dialog) {
   // If we're exiting, popping up the confirmation dialog can cause a
   // crash. Note: IsTryingToQuit can be cancelled on other platforms by the
   // onbeforeunload handler, except on ChromeOS. So IsTryingToQuit is the
   // appropriate check to use here.
   if (!dialog_window_ ||
       !MobileActivator::GetInstance()->RunningActivation() ||
       browser_shutdown::IsTryingToQuit()) {
     *out_close_dialog = true;
     return;
   }
 
   *out_close_dialog = chrome::ShowMessageBox(dialog_window_,
       l10n_util::GetStringUTF16(IDS_MOBILE_SETUP_TITLE),
       l10n_util::GetStringUTF16(IDS_MOBILE_CANCEL_ACTIVATION),
       chrome::MESSAGE_BOX_TYPE_QUESTION);
 }
 
 bool MobileSetupDialogDelegate::ShouldShowDialogTitle() const {
   return true;
 }
 
 bool MobileSetupDialogDelegate::HandleContextMenu(
     const content::ContextMenuParams& params) {
   return true;
 }