Add RootWindowController

ash/system/status_area_widget.cc

Index: ash/system/status_area_widget.cc
diff --git a/ash/system/status_area_widget.cc b/ash/system/status_area_widget.cc
index f0ae1d011962800493d8f33a8df2a7e57476aafe..9c0a3125414da925e3255b827ee2e0d654daa638 100644
--- a/ash/system/status_area_widget.cc
+++ b/ash/system/status_area_widget.cc
@@ -4,6 +4,7 @@
 
 #include "ash/system/status_area_widget.h"
 
+#include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/shell_window_ids.h"
@@ -285,9 +286,9 @@ StatusAreaWidget::StatusAreaWidget()
   views::Widget::InitParams params(
       views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
   params.delegate = widget_delegate_;
-  params.parent = Shell::GetContainer(
-      Shell::GetPrimaryRootWindow(),
-      ash::internal::kShellWindowId_StatusContainer);
+  params.parent =
+      Shell::GetPrimaryRootWindowController()->GetContainer(
+          ash::internal::kShellWindowId_StatusContainer);
   params.transparent = true;
   Init(params);
   set_focus_on_creation(false);