Connect BackgroundFetch to the OfflineItemCollection

content/browser/background_fetch/background_fetch_registration_id.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_REGISTRATION_ID_H_
 #define CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_REGISTRATION_ID_H_
 
 #include <stdint.h>
 #include <string>
 
 #include "content/common/content_export.h"
 #include "url/origin.h"
 
 namespace content {
 
 // The Background Fetch registration id corresponds to the information required
 // to uniquely identify a Background Fetch registration in scope of a profile.
 class CONTENT_EXPORT BackgroundFetchRegistrationId {
  public:
   BackgroundFetchRegistrationId();
   BackgroundFetchRegistrationId(int64_t service_worker_registration_id,
                                 const url::Origin& origin,
                                 const std::string& tag);
   BackgroundFetchRegistrationId(const BackgroundFetchRegistrationId& other);
   BackgroundFetchRegistrationId(BackgroundFetchRegistrationId&& other);
   ~BackgroundFetchRegistrationId();
 
+  // Deserialize the string format of a registration_id.
+  static bool Deserialize(const std::string& serialized_registration_id,
+                          BackgroundFetchRegistrationId* out_registration_id);
+
+  // Serialize the registration_id into a string so that it can be sent to
+  // embedders in a neutral format.
+  std::string Serialize() const;
+
   BackgroundFetchRegistrationId& operator=(
       const BackgroundFetchRegistrationId& other);
 
   // Returns whether the |other| registration id are identical or different.
   bool operator==(const BackgroundFetchRegistrationId& other) const;
   bool operator!=(const BackgroundFetchRegistrationId& other) const;
 
   // Enables this type to be used in an std::map and std::set.
   // TODO(peter): Delete this when we switch away from using maps.
   bool operator<(const BackgroundFetchRegistrationId& other) const;
 
   // Returns whether this registration id refers to valid data.
   bool is_null() const;
 
   int64_t service_worker_registration_id() const {
     return service_worker_registration_id_;
   }
   const url::Origin& origin() const { return origin_; }
   const std::string& tag() const { return tag_; }
 
  private:
   int64_t service_worker_registration_id_;
   url::Origin origin_;
   std::string tag_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_REGISTRATION_ID_H_