Simplify infobar expiry.

components/infobars/core/confirm_infobar_delegate.cc

 // Copyright (c) 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.
 
 #include "components/infobars/core/confirm_infobar_delegate.h"
 
 #include "base/logging.h"
 #include "components/infobars/core/infobar.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/strings/grit/ui_strings.h"
@@ skipping 35 matching lines @@
 }
 
 bool ConfirmInfoBarDelegate::LinkClicked(WindowOpenDisposition disposition) {
   return true;
 }
 
 ConfirmInfoBarDelegate::ConfirmInfoBarDelegate()
     : InfoBarDelegate() {
 }
 
-bool ConfirmInfoBarDelegate::ShouldExpireInternal(
-    const NavigationDetails& details) const {
-  return !details.did_replace_entry &&
-      InfoBarDelegate::ShouldExpireInternal(details);
-}
-
 bool ConfirmInfoBarDelegate::EqualsDelegate(InfoBarDelegate* delegate) const {
   ConfirmInfoBarDelegate* confirm_delegate =
       delegate->AsConfirmInfoBarDelegate();
   return confirm_delegate &&
       (confirm_delegate->GetMessageText() == GetMessageText());
 }
 
 ConfirmInfoBarDelegate* ConfirmInfoBarDelegate::AsConfirmInfoBarDelegate() {
   return this;
 }