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

content/shell/shell.h

Index: content/shell/shell.h
diff --git a/content/shell/shell.h b/content/shell/shell.h
index 82e2a6a233bd3956fcdd0d729be57c12473f70a5..8c973cc846ce16592e0a222616c44410175bbbba 100644
--- a/content/shell/shell.h
+++ b/content/shell/shell.h
@@ -32,6 +32,7 @@ class Widget;
 class ViewsDelegate;
 }
 namespace aura {
+class RootWindow;
 namespace client {
 class StackingClient;
 }
@@ -39,8 +40,13 @@ class StackingClient;
 #endif
 
 class GURL;
+
 namespace content {
 
+// Content area size for newly created windows.
+static const int kTestWindowWidth = 800;
+static const int kTestWindowHeight = 600;
+
 class BrowserContext;
 class ShellJavaScriptDialogCreator;
 class SiteInstance;
@@ -203,6 +209,10 @@ class Shell : public WebContentsDelegate,
   CHROMEG_CALLBACK_3(Shell, gboolean, OnHighlightURLView, GtkAccelGroup*,
                      GObject*, guint, GdkModifierType);
 #endif
+#if defined(USE_AURA)
+  static scoped_ptr<aura::RootWindow> CreateRootWindow(int width,
+                                                       int height);
+#endif
 
   scoped_ptr<ShellJavaScriptDialogCreator> dialog_creator_;