Implement GetJobResponse and merge JobData into DataManager.

content/browser/background_fetch/background_fetch_job_data.h

-// 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.
-
-#ifndef CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_JOB_DATA_H_
-#define CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_JOB_DATA_H_
-
-#include <string>
-#include <unordered_map>
-
-#include "base/macros.h"
-#include "content/browser/background_fetch/background_fetch_request_info.h"
-#include "content/common/content_export.h"
-#include "content/public/browser/download_interrupt_reasons.h"
-#include "content/public/browser/download_item.h"
-#include "url/origin.h"
-
-namespace content {
-
-// The BackgroundFetchJobData class provides the interface from the
-// JobController to the data storage in the DataManager. It has a reference
-// to the DataManager and invokes calls given the stored batch_guid.
-class CONTENT_EXPORT BackgroundFetchJobData {
- public:
-  explicit BackgroundFetchJobData(BackgroundFetchRequestInfos& request_infos);
-  ~BackgroundFetchJobData();
-
-  // Called by the JobController to inform the JobData that the given fetch
-  // has been updated. The JobData returns a boolean indicating whether there
-  // are more requests to process.
-  bool UpdateBackgroundFetchRequestState(
-      const std::string& fetch_guid,
-      DownloadItem::DownloadState state,
-      DownloadInterruptReason interrupt_reason);
-
-  // Called by the JobController to get a BackgroundFetchRequestInfo to
-  // process.
-  const BackgroundFetchRequestInfo& GetNextBackgroundFetchRequestInfo();
-
-  // Indicates whether all requests have been handed to the JobController.
-  bool HasRequestsRemaining() const;
-
-  // Indicates whether all requests have been handed out and completed.
-  bool IsComplete() const;
-
-  // Inform the JobData of the GUID the DownloadManager assigned to this
-  // request.
-  void SetRequestDownloadGuid(const std::string& request_guid,
-                              const std::string& download_guid);
-
- private:
-  BackgroundFetchRequestInfos& request_infos_;
-
-  // Map from fetch_guid to index in request_infos_. Only currently
-  // outstanding requests should be in this map.
-  std::unordered_map<std::string, int> request_info_index_;
-  size_t next_request_info_ = 0;
-
-  DISALLOW_COPY_AND_ASSIGN(BackgroundFetchJobData);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_JOB_DATA_H_