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

chrome/browser/ui/startup/obsolete_os_prompt.cc

Index: chrome/browser/ui/startup/obsolete_os_prompt.cc
===================================================================
--- chrome/browser/ui/startup/obsolete_os_prompt.cc	(revision 175396)
+++ chrome/browser/ui/startup/obsolete_os_prompt.cc	(working copy)
@@ -1,15 +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.
-
-#include "chrome/browser/ui/startup/obsolete_os_prompt.h"
-
-namespace chrome {
-
-#if !defined(TOOLKIT_GTK)
-void ShowObsoleteOSPrompt(Browser* browser) {
-  // Only shown on Gtk.
-}
-#endif
-
-}  // namespace chrome