Infobar system refactor.

chrome/browser/ui/cocoa/infobars/alternate_nav_infobar_controller.mm

Index: chrome/browser/ui/cocoa/infobars/alternate_nav_infobar_controller.mm
===================================================================
--- chrome/browser/ui/cocoa/infobars/alternate_nav_infobar_controller.mm	(revision 238220)
+++ chrome/browser/ui/cocoa/infobars/alternate_nav_infobar_controller.mm	(working copy)
@@ -57,10 +57,13 @@
 
 @end
 
-InfoBar* AlternateNavInfoBarDelegate::CreateInfoBar(InfoBarService* owner) {
-  scoped_ptr<InfoBarCocoa> infobar(new InfoBarCocoa(owner, this));
+// static
+scoped_ptr<InfoBar> AlternateNavInfoBarDelegate::CreateInfoBar(
+    scoped_ptr<AlternateNavInfoBarDelegate> delegate) {
+  scoped_ptr<InfoBarCocoa> infobar(
+      new InfoBarCocoa(delegate.PassAs<InfoBarDelegate>()));
   base::scoped_nsobject<AlternateNavInfoBarController> controller(
       [[AlternateNavInfoBarController alloc] initWithInfoBar:infobar.get()]);
   infobar->set_controller(controller);
-  return infobar.release();
+  return infobar.PassAs<InfoBar>();
 }