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

chrome/browser/ui/startup/obsolete_os_info_bar.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 CHROME_BROWSER_UI_STARTUP_OBSOLETE_OS_INFO_BAR_H_
 #define CHROME_BROWSER_UI_STARTUP_OBSOLETE_OS_INFO_BAR_H_
 
 #include "base/compiler_specific.h"
 #include "base/string16.h"
 #include "chrome/browser/api/infobars/confirm_infobar_delegate.h"
 #include "googleurl/src/gurl.h"
 
 class InfoBarService;
 
 namespace chrome {
 
 // An infobar that is run with a string and a "Learn More" link.
 class ObsoleteOSInfoBar : public ConfirmInfoBarDelegate {
  public:
-  ObsoleteOSInfoBar(InfoBarService* infobar_service,
-                    const string16& message,
-                    const GURL& url);
-  virtual ~ObsoleteOSInfoBar();
+  // Creates an obsolete OS delegate and adds it to |infobar_service|.
+  static void Create(InfoBarService* infobar_service);
 
  private:
   virtual string16 GetMessageText() const OVERRIDE;
   virtual int GetButtons() const OVERRIDE;
   virtual string16 GetLinkText() const OVERRIDE;
   virtual bool LinkClicked(WindowOpenDisposition disposition) OVERRIDE;
 
+  ObsoleteOSInfoBar(InfoBarService* infobar_service,
+                    const string16& message,
+                    const GURL& url);
+  virtual ~ObsoleteOSInfoBar();
+
   const string16 message_;
   const GURL learn_more_url_;
 
   DISALLOW_COPY_AND_ASSIGN(ObsoleteOSInfoBar);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_STARTUP_OBSOLETE_OS_INFO_BAR_H_