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

chrome/browser/ui/collected_cookies_infobar_delegate.h

Index: chrome/browser/ui/collected_cookies_infobar_delegate.h
===================================================================
--- chrome/browser/ui/collected_cookies_infobar_delegate.h	(revision 175396)
+++ chrome/browser/ui/collected_cookies_infobar_delegate.h	(working copy)
@@ -16,9 +16,12 @@
 // the reload right from the infobar.
 class CollectedCookiesInfoBarDelegate : public ConfirmInfoBarDelegate {
  public:
+  // Creates a collected cookies delegate and adds it to |infobar_service|.
+  static void Create(InfoBarService* infobar_service);
+
+ private:
   explicit CollectedCookiesInfoBarDelegate(InfoBarService* infobar_service);
 
- private:
   // ConfirmInfoBarDelegate overrides.
   virtual gfx::Image* GetIcon() const OVERRIDE;
   virtual Type GetInfoBarType() const OVERRIDE;