Create the BackgroundFetchBatchManager and initiate a download.

content/browser/background_fetch/fetch_request.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_FETCH_REQUEST_H_
-#define CONTENT_BROWSER_BACKGROUND_FETCH_FETCH_REQUEST_H_
-
-#include "content/common/content_export.h"
-#include "content/common/service_worker/service_worker_types.h"
-#include "url/gurl.h"
-#include "url/origin.h"
-
-namespace content {
-
-// Simple class to encapsulate the components of a fetch request.
-class CONTENT_EXPORT FetchRequest {
- public:
-  FetchRequest();
-  FetchRequest(const url::Origin& origin,
-               const GURL& url,
-               int64_t sw_registration_id,
-               const std::string& tag);
-  // TODO(harkness): Remove copy constructor once the final (non-map-based)
-  // state management is in place.
-  FetchRequest(const FetchRequest& request);
-  ~FetchRequest();
-
-  const std::string& guid() const { return guid_; }
-  const url::Origin& origin() const { return origin_; }
-  const GURL& url() const { return url_; }
-  int64_t service_worker_registration_id() const {
-    return service_worker_registration_id_;
-  }
-  const std::string& tag() const { return tag_; }
-
- private:
-  std::string guid_;
-  url::Origin origin_;
-  GURL url_;
-  int64_t service_worker_registration_id_ = kInvalidServiceWorkerRegistrationId;
-  std::string tag_;
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_BACKGROUND_FETCH_FETCH_REQUEST_H_