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

content/shell/shell.cc

Index: content/shell/shell.cc
diff --git a/content/shell/shell.cc b/content/shell/shell.cc
index d4e68c04fa2d1dfecdb70af50e5d85e836a20472..948ffdd35df307556e14a894c1eee8a9c8ba66ad 100644
--- a/content/shell/shell.cc
+++ b/content/shell/shell.cc
@@ -30,9 +30,9 @@
 #include "content/shell/shell_switches.h"
 #include "content/shell/webkit_test_controller.h"
 
-// Content area size for newly created windows.
-static const int kTestWindowWidth = 800;
-static const int kTestWindowHeight = 600;
+#if defined(USE_AURA)
+#include "content/shell/shell_stacking_client_ash.h"
+#endif
 
 namespace content {
 
@@ -121,12 +121,16 @@ Shell* Shell::CreateNewWindow(BrowserContext* browser_context,
                               SiteInstance* site_instance,
                               int routing_id,
                               const gfx::Size& initial_size) {
-  WebContents::CreateParams create_params(browser_context, site_instance);
+  WebContents::CreateParams create_params(
+      browser_context, site_instance);

[sky, 2013/01/16 00:55:39]

Why are you changing this?

[Nayan, 2013/01/16 01:07:29]

Done.

   create_params.routing_id = routing_id;
   if (!initial_size.IsEmpty())
     create_params.initial_size = initial_size;
   else
-    create_params.initial_size = gfx::Size(kTestWindowWidth, kTestWindowHeight);
+    create_params.initial_size =
+        gfx::Size(kTestWindowWidth, kTestWindowHeight);

[sky, 2013/01/16 00:55:39]

Why are you changing this line?

[Nayan, 2013/01/16 01:07:29]

Done.

+  create_params.context = Shell::stacking_client_->GetDefaultParent(

[sky, 2013/01/16 00:55:39]

This is aura specific, right?

[Nayan, 2013/01/16 01:07:29]

Done.

+      NULL, NULL, gfx::Rect());
   WebContents* web_contents = WebContents::Create(create_params);
   Shell* shell = CreateShell(web_contents);
   if (!url.is_empty())