[Offline pages] Downloads UI: Adding bridge for issuing notifications

components/offline_pages/downloads/download_ui_item.h

 // Copyright 2016 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.
 
 #ifndef COMPONENTS_OFFLINE_PAGES_DOWNLOADS_DOWNLOAD_UI_ITEM_H_
 #define COMPONENTS_OFFLINE_PAGES_DOWNLOADS_DOWNLOAD_UI_ITEM_H_
 
 #include <stdint.h>
 
 #include <string>
 
 #include "base/files/file_path.h"
 #include "base/time/time.h"
 #include "components/offline_pages/offline_page_item.h"
 #include "url/gurl.h"
 
 namespace offline_pages {
 
 struct DownloadUIItem {
  public:
   DownloadUIItem();
   explicit DownloadUIItem(const OfflinePageItem& page);
+  DownloadUIItem(const DownloadUIItem& other);
   ~DownloadUIItem();
 
   // Unique id.
   std::string guid;
 
   // The URL of the captured page.
   GURL url;
 
   // The file path to the archive with a local copy of the page.
   base::FilePath target_path;
 
   // The time when the offline archive was created.
   base::Time start_time;
 
   // The size of the offline copy.
   int64_t total_bytes;
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_DOWNLOADS_DOWNLOAD_UI_ITEM_H_