Convert WindowOpenDisposition to an enum class.

chrome/browser/download/notification/download_item_notification.cc

 // Copyright 2015 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/download/notification/download_item_notification.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/files/file_util.h"
@@ skipping 234 matching lines @@
       content::RecordAction(
           UserMetricsAction("DownloadNotification.Click_InProgress"));
       item_->SetOpenWhenComplete(!item_->GetOpenWhenComplete());  // Toggle
       break;
     case content::DownloadItem::CANCELLED:
     case content::DownloadItem::INTERRUPTED:
       content::RecordAction(
           UserMetricsAction("DownloadNotification.Click_Stopped"));
       GetBrowser()->OpenURL(content::OpenURLParams(
           GURL(chrome::kChromeUIDownloadsURL), content::Referrer(),
-          NEW_FOREGROUND_TAB, ui::PAGE_TRANSITION_LINK,
+          WindowOpenDisposition::NEW_FOREGROUND_TAB, ui::PAGE_TRANSITION_LINK,
           false /* is_renderer_initiated */));
       CloseNotificationByUser();
       break;
     case content::DownloadItem::COMPLETE:
       content::RecordAction(
           UserMetricsAction("DownloadNotification.Click_Completed"));
       item_->OpenDownload();
       CloseNotificationByUser();
       break;
     case content::DownloadItem::MAX_DOWNLOAD_STATE:
@@ skipping 669 matching lines @@
   const std::string notification_id_in_message_center = notification->id();
 
   message_center::NotificationList::Notifications visible_notifications =
       message_center_->GetVisibleNotifications();
   for (auto* notification : visible_notifications) {
     if (notification->id() == notification_id_in_message_center)
       return true;
   }
   return false;
 }