Make the BackgroundFetchJobController a per-job object

content/browser/background_fetch/background_fetch_job_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_job_info.h"
 
 #include "base/guid.h"
 
 namespace content {
 
 BackgroundFetchJobInfo::BackgroundFetchJobInfo(
     const std::string& tag,
     const url::Origin& origin,
     int64_t service_worker_registration_id)
     : guid_(base::GenerateGUID()),
       tag_(tag),
       origin_(origin),
       service_worker_registration_id_(service_worker_registration_id) {}
 
+BackgroundFetchJobInfo::BackgroundFetchJobInfo() = default;
+
+BackgroundFetchJobInfo::BackgroundFetchJobInfo(
+    const BackgroundFetchJobInfo& other)
+    : guid_(other.guid_),
+      tag_(other.tag_),
+      origin_(other.origin_),
+      service_worker_registration_id_(other.service_worker_registration_id_),
+      request_guids_(other.request_guids_) {}
+
 BackgroundFetchJobInfo::~BackgroundFetchJobInfo() = default;
 
 }  // namespace content