aura: Make sure the desktop widget gets parented to the correct container.

ui/aura_shell/desktop_background_view.cc

Index: ui/aura_shell/desktop_background_view.cc
diff --git a/ui/aura_shell/desktop_background_view.cc b/ui/aura_shell/desktop_background_view.cc
index 1edee7f32ad8ad60a39ed045e30c231476b40224..9b5ce7ebf4ffb4f42a7702357bc917ad4833c48b 100644
--- a/ui/aura_shell/desktop_background_view.cc
+++ b/ui/aura_shell/desktop_background_view.cc
@@ -45,12 +45,14 @@ void DesktopBackgroundView::OnMouseReleased(const views::MouseEvent& event) {
 
 views::Widget* CreateDesktopBackground() {
   views::Widget* desktop_widget = new views::Widget;
-  views::Widget::InitParams params(views::Widget::InitParams::TYPE_CONTROL);
-  params.parent = Shell::GetInstance()->GetContainer(
-      aura_shell::internal::kShellWindowId_DesktopBackgroundContainer);
+  views::Widget::InitParams params(
+      views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
   DesktopBackgroundView* view = new DesktopBackgroundView;
   params.delegate = view;
   desktop_widget->Init(params);
+  Shell::GetInstance()->GetContainer(
+      aura_shell::internal::kShellWindowId_DesktopBackgroundContainer)->
+      AddChild(desktop_widget->GetNativeView());
   desktop_widget->SetContentsView(view);
   desktop_widget->Show();
   desktop_widget->GetNativeView()->set_name("DesktopBackgroundView");