Moves maintaining root_window_for_new_windows_ to Shell

chrome/browser/chromeos/ui/idle_app_name_notification_view.cc

Index: chrome/browser/chromeos/ui/idle_app_name_notification_view.cc
diff --git a/chrome/browser/chromeos/ui/idle_app_name_notification_view.cc b/chrome/browser/chromeos/ui/idle_app_name_notification_view.cc
index 23a39bf7e10301d8e4239b51575cd601a7e6201b..5b35927aeb886d788d3821856ac6e279d6bdd165 100644
--- a/chrome/browser/chromeos/ui/idle_app_name_notification_view.cc
+++ b/chrome/browser/chromeos/ui/idle_app_name_notification_view.cc
@@ -54,7 +54,7 @@ const int kWindowCornerRadius = 4;
 // Creates and shows the message widget for |view| with |animation_time_ms|.
 void CreateAndShowWidget(views::WidgetDelegateView* delegate,
                          int animation_time_ms) {
-  aura::Window* root_window = ash::Shell::GetTargetRootWindow();
+  aura::Window* root_window = ash::Shell::GetRootWindowForNewWindows();
   gfx::Size rs = root_window->bounds().size();
   gfx::Size ps = delegate->GetPreferredSize();
   gfx::Rect bounds((rs.width() - ps.width()) / 2,