Create the BackgroundFetchBatchManager and initiate a download.

content/browser/background_fetch/background_fetch_data_manager.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_DATA_MANAGER_H_
 #define CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_DATA_MANAGER_H_
 
 #include <map>
 #include <string>
+#include <unordered_map>
 
 #include "base/macros.h"
-#include "content/browser/background_fetch/fetch_request.h"
+#include "content/browser/background_fetch/background_fetch_job_data.h"
 #include "content/common/content_export.h"
 #include "url/origin.h"
 
 namespace content {
 
 class BackgroundFetchContext;
+class BackgroundFetchJobInfo;
 
 // The BackgroundFetchDataManager keeps track of all of the outstanding requests
 // which are in process in the DownloadManager. When Chromium restarts, it is
 // responsibile for reconnecting all the in progress downloads with an observer
 // which will keep the metadata up to date.
 class CONTENT_EXPORT BackgroundFetchDataManager {
  public:
   explicit BackgroundFetchDataManager(
       BackgroundFetchContext* background_fetch_context);
   ~BackgroundFetchDataManager();
 
   // Called by BackgroundFetchContext when a new request is started, this will
-  // store all of the necessary metadata to track the request.
-  void CreateRequest(const FetchRequest& fetch_request);
+  // store all of the necessary metadata to track the request. The lifetime of
+  // the returned pointer is tied to the lifetime of the
+  // BackgroundFetchDataManager.
+  // TODO(harkness): Lifetime should be tied to the lifetime of the associated
+  // JobController once there is a JobController per request.
+  BackgroundFetchJobData* CreateRequest(
+      const BackgroundFetchJobInfo& job_info,
+      BackgroundFetchRequestInfos request_infos);
 
  private:
   // BackgroundFetchContext owns this BackgroundFetchDataManager, so the
   // DataManager is guaranteed to be destructed before the Context.
   BackgroundFetchContext* background_fetch_context_;
 
-  // Map from <sw_registration_id, tag> to the FetchRequest for that tag.
-  using FetchIdentifier = std::pair<int64_t, std::string>;
-  std::map<FetchIdentifier, FetchRequest> fetch_map_;
+  // Map from <sw_registration_id, tag> to the JobData for that tag.
+  using JobIdentifier = std::pair<int64_t, std::string>;
+  std::map<JobIdentifier, std::string> service_worker_tag_map_;
+
+  // Map of batch guid to the associated BackgroundFetchJobData object.
+  std::unordered_map<std::string, std::unique_ptr<BackgroundFetchJobData>>
+      batch_map_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundFetchDataManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_DATA_MANAGER_H_