mash: remove more shell/shelf WmWindow usage.

ash/system/session/logout_confirmation_dialog.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 "ash/system/session/logout_confirmation_dialog.h"
 
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/root_window_controller.h"
-#include "ash/shell_port.h"
+#include "ash/shell.h"
 #include "ash/strings/grit/ash_strings.h"
 #include "ash/system/session/logout_confirmation_controller.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ash/wm_window.h"
 #include "base/location.h"
 #include "base/time/tick_clock.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/l10n/time_format.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/gfx/geometry/rect.h"
@@ skipping 23 matching lines @@
                                              kTrayPopupPaddingHorizontal));
   label_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
   label_->SetMultiLine(true);
   AddChildView(label_);
 
   UpdateLabel();
 
   views::Widget* widget = new views::Widget;
   views::Widget::InitParams params =
       GetDialogWidgetInitParams(this, nullptr, nullptr, gfx::Rect());
-  ShellPort::Get()
-      ->GetPrimaryRootWindow()
-      ->GetRootWindowController()
+  Shell::GetPrimaryRootWindowController()
       ->ConfigureWidgetInitParamsForContainer(
           widget, kShellWindowId_SystemModalContainer, &params);
   widget->Init(params);
   widget->Show();
 
   update_timer_.Start(
       FROM_HERE, base::TimeDelta::FromMilliseconds(kCountdownUpdateIntervalMs),
       this, &LogoutConfirmationDialog::UpdateLabel);
 }
 
@@ skipping 47 matching lines @@
                                  ui::TimeFormat::LENGTH_LONG, 10,
                                  time_remaining)));
   } else {
     label_->SetText(
         l10n_util::GetStringUTF16(IDS_ASH_LOGOUT_CONFIRMATION_WARNING_NOW));
     update_timer_.Stop();
   }
 }
 
 }  // namespace ash