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

chrome/browser/infobars/alternate_nav_infobar_delegate.h

 // Copyright 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_INFOBARS_ALTERNATE_NAV_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_INFOBARS_ALTERNATE_NAV_INFOBAR_DELEGATE_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "chrome/browser/api/infobars/infobar_delegate.h"
 #include "googleurl/src/gurl.h"
 
 class AlternateNavInfoBarDelegate : public InfoBarDelegate {
  public:
-  AlternateNavInfoBarDelegate(InfoBarService* owner,
-                              const GURL& alternate_nav_url);
-  virtual ~AlternateNavInfoBarDelegate();
+  // Creates an alternate nav delegate and adds it to |infobar_service|.
+  static void Create(InfoBarService* infobar_service,
+                     const GURL& alternate_nav_url);
 
   string16 GetMessageTextWithOffset(size_t* link_offset) const;
   string16 GetLinkText() const;
   bool LinkClicked(WindowOpenDisposition disposition);
 
  private:
+  AlternateNavInfoBarDelegate(InfoBarService* owner,
+                              const GURL& alternate_nav_url);
+  virtual ~AlternateNavInfoBarDelegate();
+
   // InfoBarDelegate:
   virtual InfoBar* CreateInfoBar(InfoBarService* owner) OVERRIDE;
   virtual gfx::Image* GetIcon() const OVERRIDE;
   virtual Type GetInfoBarType() const OVERRIDE;
   virtual AlternateNavInfoBarDelegate* AsAlternateNavInfoBarDelegate() OVERRIDE;
 
   GURL alternate_nav_url_;
 
   DISALLOW_COPY_AND_ASSIGN(AlternateNavInfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_INFOBARS_ALTERNATE_NAV_INFOBAR_DELEGATE_H_