mash: Move SystemTrayDelegate ownership to WmShell

ash/system/chromeos/session/logout_button_tray.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/chromeos/session/logout_button_tray.h"
 
 #include <memory>
 #include <utility>
 
 #include "ash/common/shelf/shelf_types.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/common/system/tray/tray_constants.h"
+#include "ash/common/wm_shell.h"
 #include "ash/shell.h"
 #include "ash/system/chromeos/session/logout_confirmation_controller.h"
 #include "ash/system/status_area_widget.h"
 #include "ash/system/tray/system_tray_notifier.h"
 #include "ash/system/tray/tray_utils.h"
 #include "base/logging.h"
 #include "grit/ash_resources.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/events/event.h"
 #include "ui/gfx/geometry/insets.h"
@@ skipping 108 matching lines @@
 
 void LogoutButtonTray::OnLogoutDialogDurationChanged(base::TimeDelta duration) {
   dialog_duration_ = duration;
 }
 
 void LogoutButtonTray::ButtonPressed(views::Button* sender,
                                      const ui::Event& event) {
   DCHECK_EQ(sender, button_);
   if (dialog_duration_ <= base::TimeDelta()) {
     // Sign out immediately if |dialog_duration_| is non-positive.
-    Shell::GetInstance()->system_tray_delegate()->SignOut();
+    WmShell::Get()->system_tray_delegate()->SignOut();
   } else if (Shell::GetInstance()->logout_confirmation_controller()) {
     Shell::GetInstance()->logout_confirmation_controller()->ConfirmLogout(
         base::TimeTicks::Now() + dialog_duration_);
   }
 }
 
 void LogoutButtonTray::UpdateAfterLoginStatusChange(LoginStatus login_status) {
   login_status_ = login_status;
   const base::string16 title =
       user::GetLocalizedSignOutStringForStatus(login_status, false);
   button_->SetText(title);
   button_->SetAccessibleName(title);
   UpdateVisibility();
 }
 
 void LogoutButtonTray::UpdateVisibility() {
   SetVisible(show_logout_button_in_tray_ &&
              login_status_ != LoginStatus::NOT_LOGGED_IN &&
              login_status_ != LoginStatus::LOCKED);
 }
 
 }  // namespace ash