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

chrome/browser/infobars/infobar_delegate.cc

 // Copyright (c) 2011 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.
 
 #include "chrome/browser/infobars/infobar_delegate.h"
 
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "chrome/browser/infobars/infobar_tab_helper.h"
 #include "content/browser/tab_contents/navigation_details.h"
@@ skipping 13 matching lines @@
     const content::LoadCommittedDetails& details) const {
   if (!details.is_navigation_to_different_page())
     return false;
 
   return ShouldExpireInternal(details);
 }
 
 void InfoBarDelegate::InfoBarDismissed() {
 }
 
-void InfoBarDelegate::InfoBarClosed() {
-  delete this;
-}
-
 gfx::Image* InfoBarDelegate::GetIcon() const {
   return NULL;
 }
 
 InfoBarDelegate::Type InfoBarDelegate::GetInfoBarType() const {
   return WARNING_TYPE;
 }
 
 ConfirmInfoBarDelegate* InfoBarDelegate::AsConfirmInfoBarDelegate() {
   return NULL;
@@ skipping 44 matching lines @@
     const content::LoadCommittedDetails& details) const {
   return (contents_unique_id_ != details.entry->unique_id()) ||
       (content::PageTransitionStripQualifier(
           details.entry->transition_type()) == content::PAGE_TRANSITION_RELOAD);
 }
 
 void InfoBarDelegate::RemoveSelf() {
   if (owner_)
     owner_->RemoveInfoBar(this);  // Clears |owner_|.
 }