Remove InfoBarDelegate::InfoBarClosed(), delete InfoBars directly.

chrome/browser/infobars/infobar_delegate.h

Index: chrome/browser/infobars/infobar_delegate.h
diff --git a/chrome/browser/infobars/infobar_delegate.h b/chrome/browser/infobars/infobar_delegate.h
index 22f8152e5f1c778119920fa87f5c476d32b5bcba..25b926bb1464c560a0088703de6107806e2301f1 100644
--- a/chrome/browser/infobars/infobar_delegate.h
+++ b/chrome/browser/infobars/infobar_delegate.h
@@ -70,10 +70,6 @@ class InfoBarDelegate {
   // Called when the user clicks on the close button to dismiss the infobar.
   virtual void InfoBarDismissed();
 
-  // Called after the InfoBar is closed. Deletes |this|.
-  // TODO(pkasting): Get rid of this and delete delegates directly.
-  void InfoBarClosed();
-
   // Return the icon to be shown for this InfoBar. If the returned Image is
   // NULL, no icon is shown.
   virtual gfx::Image* GetIcon() const;