Call ShowRootWindow on NativeWindow's RootWindow to display the window.

content/shell/shell_stacking_client_ash.h

Index: content/shell/shell_stacking_client_ash.h
diff --git a/content/shell/shell_stacking_client_ash.h b/content/shell/shell_stacking_client_ash.h
index de169c4932a881199b8bd2d6d85318204cf590b2..bce0a4447a682513e22df14b911a1de2f5d47775 100644
--- a/content/shell/shell_stacking_client_ash.h
+++ b/content/shell/shell_stacking_client_ash.h
@@ -39,20 +39,20 @@ namespace content {
 // the ash parts of the code.
 class ShellStackingClientAsh : public aura::client::StackingClient {
  public:
-  ShellStackingClientAsh();
+  explicit ShellStackingClientAsh(
+      scoped_ptr<aura::RootWindow> root_window);
   virtual ~ShellStackingClientAsh();
-
   // Overridden from client::StackingClient:
   virtual aura::Window* GetDefaultParent(aura::Window* context,
                                          aura::Window* window,
                                          const gfx::Rect& bounds) OVERRIDE;
-
  private:
+  void Init();
+
   scoped_ptr<aura::RootWindow> root_window_;
 
   // Owned by RootWindow
   views::corewm::CompoundEventFilter* root_window_event_filter_;
-
   scoped_ptr<aura::client::DefaultCaptureClient> capture_client_;
   scoped_ptr<views::corewm::InputMethodEventFilter> input_method_filter_;
   scoped_ptr<aura::test::TestActivationClient> test_activation_client_;