Store BackgroundFetchRequestInfo in a refcounted pointer

content/browser/background_fetch/background_fetch_request_info.cc

 // Copyright 2017 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 "content/browser/background_fetch/background_fetch_request_info.h"
 
 #include <string>
 
 #include "content/public/browser/download_item.h"
 
 namespace content {
 
-BackgroundFetchRequestInfo::BackgroundFetchRequestInfo() = default;
-
 BackgroundFetchRequestInfo::BackgroundFetchRequestInfo(
     int request_index,
     const ServiceWorkerFetchRequest& fetch_request)
     : request_index_(request_index), fetch_request_(fetch_request) {}
 
-BackgroundFetchRequestInfo::BackgroundFetchRequestInfo(
-    const BackgroundFetchRequestInfo& request)
-    : request_index_(request.request_index_),
-      fetch_request_(request.fetch_request_),
-      download_guid_(request.download_guid_),
-      state_(request.state_),
-      interrupt_reason_(request.interrupt_reason_),
-      file_path_(request.file_path_),
-      received_bytes_(request.received_bytes_) {}
-
 BackgroundFetchRequestInfo::~BackgroundFetchRequestInfo() {}
 
 bool BackgroundFetchRequestInfo::IsComplete() const {
   return (state_ == DownloadItem::DownloadState::COMPLETE ||
           state_ == DownloadItem::DownloadState::CANCELLED);
 }
 
 const GURL& BackgroundFetchRequestInfo::GetURL() const {
   return fetch_request_.url;
 }
 
 }  // namespace content