Add method for identifying different InfoBars

chrome/browser/notifications/notification_permission_infobar_delegate.cc

 // Copyright 2014 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/notifications/notification_permission_infobar_delegate.h"
 
 #include "chrome/browser/android/android_theme_resources.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/infobars/core/infobar.h"
@@ skipping 21 matching lines @@
     : PermissionInfobarDelegate(requesting_frame,
                                 content::PermissionType::NOTIFICATIONS,
                                 CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
                                 callback),
       requesting_frame_(requesting_frame),
       display_languages_(display_languages) {}
 
 NotificationPermissionInfobarDelegate::~NotificationPermissionInfobarDelegate()
     {}
 
+infobars::InfoBarDelegate::InfoBarIdentifier
+NotificationPermissionInfobarDelegate::GetIdentifier() const {
+  return NOTIFICATION_PERMISSION_INFOBAR_DELEGATE;
+}
+
 int NotificationPermissionInfobarDelegate::GetIconId() const {
   return IDR_ANDROID_INFOBAR_NOTIFICATIONS;
 }
 
 base::string16 NotificationPermissionInfobarDelegate::GetMessageText() const {
   return l10n_util::GetStringFUTF16(
       IDS_NOTIFICATION_PERMISSIONS,
       url_formatter::FormatUrlForSecurityDisplay(requesting_frame_.GetOrigin(),
                                                  display_languages_));
 }