Removes a couple more functions from WmWindow

ash/wm/overview/scoped_transform_overview_window.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/scoped_transform_overview_window.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "ash/root_window_controller.h"
@@ skipping 465 matching lines @@
   params.type = views::Widget::InitParams::TYPE_WINDOW_FRAMELESS;
   params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
   params.visible_on_all_workspaces = true;
   params.name = "OverviewModeMinimized";
   params.activatable = views::Widget::InitParams::Activatable::ACTIVATABLE_NO;
   params.accept_events = true;
   minimized_widget_.reset(new views::Widget);
   window_->GetRootWindow()
       ->GetRootWindowController()
       ->ConfigureWidgetInitParamsForContainer(
-          minimized_widget_.get(), window_->GetParent()->GetShellWindowId(),
+          minimized_widget_.get(), window_->GetParent()->aura_window()->id(),
           &params);
   minimized_widget_->set_focus_on_creation(false);
   minimized_widget_->Init(params);
 
   views::View* mirror_view = window_->CreateViewWithRecreatedLayers().release();
   mirror_view->SetVisible(true);
   mirror_view->SetTargetHandler(this);
   minimized_widget_->SetContentsView(mirror_view);
   gfx::Rect bounds(window_->GetBoundsInScreen());
   gfx::Size preferred = mirror_view->GetPreferredSize();
   // In unit tests, the content view can have empty size.
   if (!preferred.IsEmpty()) {
     int inset = bounds.height() - preferred.height();
     bounds.Inset(0, 0, 0, inset);
   }
   minimized_widget_->SetBounds(bounds);
   minimized_widget_->Show();
 }
 
 }  // namespace ash