Removes a couple more functions from WmWindow

ash/wm/overview/window_selector_item.cc

 // Copyright 2013 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/wm/overview/window_selector_item.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "ash/material_design/material_design_controller.h"
@@ skipping 601 matching lines @@
   params_label.visible_on_all_workspaces = true;
   params_label.layer_type = ui::LAYER_NOT_DRAWN;
   params_label.name = "OverviewModeLabel";
   params_label.activatable =
       views::Widget::InitParams::Activatable::ACTIVATABLE_DEFAULT;
   params_label.accept_events = true;
   item_widget_.reset(new views::Widget);
   root_window_->GetRootWindowController()
       ->ConfigureWidgetInitParamsForContainer(
           item_widget_.get(),
-          transform_window_.window()->GetParent()->GetShellWindowId(),
+          transform_window_.window()->GetParent()->aura_window()->id(),
           &params_label);
   item_widget_->set_focus_on_creation(false);
   item_widget_->Init(params_label);
   WmWindow* widget_window = WmWindow::Get(item_widget_->GetNativeWindow());
   if (transform_window_.GetTopInset()) {
     // For windows with headers the overview header fades in above the
     // original window header.
     widget_window->GetParent()->StackChildAbove(widget_window,
                                                 transform_window_.window());
   } else {
@@ skipping 122 matching lines @@
 
 gfx::SlideAnimation* WindowSelectorItem::GetBackgroundViewAnimation() {
   return background_view_ ? background_view_->animation() : nullptr;
 }
 
 WmWindow* WindowSelectorItem::GetOverviewWindowForMinimizedStateForTest() {
   return transform_window_.GetOverviewWindowForMinimizedState();
 }
 
 }  // namespace ash