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

content/shell/shell.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 #ifndef CONTENT_SHELL_SHELL_H_
 #define CONTENT_SHELL_SHELL_H_
 
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 45 matching lines @@
   void LoadURL(const GURL& url);
   void GoBackOrForward(int offset);
   void Reload();
   void Stop();
   void UpdateNavigationControls();
   void Close();
   void ShowDevTools();
   void CloseDevTools();
 
   // Do one time initialization at application startup.
-  static void PlatformInitialize();
+  static void Initialize();
 
   static Shell* CreateNewWindow(BrowserContext* browser_context,
                                 const GURL& url,
                                 SiteInstance* site_instance,
                                 int routing_id,
                                 const gfx::Size& initial_size);
 
   // Returns the Shell object corresponding to the given RenderViewHost.
   static Shell* FromRenderViewHost(RenderViewHost* rvh);
 
@@ skipping 63 matching lines @@
     BACK_BUTTON,
     FORWARD_BUTTON,
     STOP_BUTTON
   };
 
   explicit Shell(WebContents* web_contents);
 
   // Helper to create a new Shell given a newly created WebContents.
   static Shell* CreateShell(WebContents* web_contents);
 
+  // Helper for one time initialization of application
+  static void PlatformInitialize(const gfx::Size& default_window_size);
+
   // All the methods that begin with Platform need to be implemented by the
   // platform specific Shell implementation.
   // Called from the destructor to let each platform do any necessary cleanup.
   void PlatformCleanUp();
   // Creates the main window GUI.
   void PlatformCreateWindow(int width, int height);
   // Links the WebContents into the newly created window.
   void PlatformSetContents();
   // Resize the content area and GUI.
   void PlatformResizeSubViews();
@@ skipping 94 matching lines @@
   static base::Callback<void(Shell*)> shell_created_callback_;
 
   // True if the destructur of Shell should post a quit closure on the current
   // message loop if the destructed Shell object was the last one.
   static bool quit_message_loop_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_SHELL_H_