Change infobar creation to use a public static Create() method on the infobar delegate classes.

chrome/browser/ui/startup/obsolete_os_prompt.h

Index: chrome/browser/ui/startup/obsolete_os_prompt.h
===================================================================
--- chrome/browser/ui/startup/obsolete_os_prompt.h	(revision 175396)
+++ chrome/browser/ui/startup/obsolete_os_prompt.h	(working copy)
@@ -1,21 +0,0 @@
-// 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 CHROME_BROWSER_UI_STARTUP_OBSOLETE_OS_PROMPT_H_
-#define CHROME_BROWSER_UI_STARTUP_OBSOLETE_OS_PROMPT_H_
-
-#include "build/build_config.h"
-
-class Browser;
-class PrefService;
-
-namespace chrome {
-
-// Shows a warning notification in |browser| that the app is being run on an
-// unsupported operating system.
-void ShowObsoleteOSPrompt(Browser* browser);
-
-}  // namespace chrome
-
-#endif  // CHROME_BROWSER_UI_STARTUP_OBSOLETE_OS_PROMPT_H_