Removes a couple more functions from WmWindow

ash/system/status_area_widget.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 "ash/system/status_area_widget.h"
 
 #include "ash/material_design/material_design_controller.h"
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/root_window_controller.h"
 #include "ash/shelf/wm_shelf.h"
@@ skipping 27 matching lines @@
       ime_menu_tray_(nullptr),
       login_status_(LoginStatus::NOT_LOGGED_IN),
       wm_shelf_(wm_shelf) {
   views::Widget::InitParams params(
       views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
   params.delegate = status_area_widget_delegate_;
   params.name = "StatusAreaWidget";
   params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
   status_container->GetRootWindowController()
       ->ConfigureWidgetInitParamsForContainer(
-          this, status_container->GetShellWindowId(), &params);
+          this, status_container->aura_window()->id(), &params);
   Init(params);
   set_focus_on_creation(false);
   SetContentsView(status_area_widget_delegate_);
 }
 
 StatusAreaWidget::~StatusAreaWidget() {}
 
 void StatusAreaWidget::CreateTrayViews() {
   AddOverviewButtonTray();
   AddSystemTray();
@@ skipping 174 matching lines @@
   ime_menu_tray_ = new ImeMenuTray(wm_shelf_);
   status_area_widget_delegate_->AddTray(ime_menu_tray_);
 }
 
 void StatusAreaWidget::AddOverviewButtonTray() {
   overview_button_tray_ = new OverviewButtonTray(wm_shelf_);
   status_area_widget_delegate_->AddTray(overview_button_tray_);
 }
 
 }  // namespace ash