Create the BackgroundFetchBatchManager and initiate a download.

content/browser/background_fetch/background_fetch_job_controller.h

Index: content/browser/background_fetch/background_fetch_job_controller.h
diff --git a/content/browser/background_fetch/background_fetch_job_controller.h b/content/browser/background_fetch/background_fetch_job_controller.h
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index 0000000000000000000000000000000000000000..f1dc0f484bb835beafe59645146b260eeda2e9a4
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+++ b/content/browser/background_fetch/background_fetch_job_controller.h
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+// 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_CONTROLLER_H_
+#define CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_JOB_CONTROLLER_H_
+
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+#include "content/browser/background_fetch/background_fetch_data_manager.h"
+#include "content/browser/background_fetch/background_fetch_request_info.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+class BrowserContext;
+class StoragePartition;
+
+// The JobController will be responsible for coordinating communication with the
+// DownloadManager. It will get requests from the JobData and dispatch them to
+// the DownloadManager.
+// TODO(harkness): The JobController should also observe downloads.
+class CONTENT_EXPORT BackgroundFetchJobController {
+ public:
+  BackgroundFetchJobController(BrowserContext* browser_context,
+                               StoragePartition* storage_partition);
+  ~BackgroundFetchJobController();
+
+  // Start processing on a batch of requests. Some of these may already be in
+  // progress or completed from a previous chromium instance.
+  void ProcessJob(const std::string& job_guid,
+                  BackgroundFetchJobData* job_data);
+
+ private:
+  void ProcessRequest(const std::string& job_guid,
+                      const BackgroundFetchRequestInfo& request);
+
+  // Pointer to the browser context. The BackgroundFetchJobController is owned
+  // by the BrowserContext via the StoragePartition.
+  BrowserContext* browser_context_;
+
+  // Pointer to the storage partition. This object is owned by the partition
+  // (through a sequence of other classes).
+  StoragePartition* storage_partition_;
+
+  // The fetch_map holds any requests which have been sent to the
+  // DownloadManager indexed by the job_guid.
+  std::unordered_map<std::string, BackgroundFetchRequestInfo> fetch_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(BackgroundFetchJobController);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_JOB_CONTROLLER_H_