Give the BackgroundFetchJobController a simple state.

content/browser/background_fetch/background_fetch_context.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_CONTEXT_H_
 #define CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_CONTEXT_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 73 matching lines @@
   void CreateController(const BackgroundFetchRegistrationId& registration_id,
                         const BackgroundFetchOptions& options);
 
   // Called when a new registration has been created by the data manager.
   void DidCreateRegistration(
       const BackgroundFetchRegistrationId& registration_id,
       const BackgroundFetchOptions& options,
       const blink::mojom::BackgroundFetchService::FetchCallback& callback,
       blink::mojom::BackgroundFetchError error);
 
-  // Called when a Job Controller has finished processing a Background Fetch
-  // registration, as identified by |registration_id|. |aborted_by_developer|
-  // will be set to true when it finished at the developer's request.
-  void DidFinishFetch(const BackgroundFetchRegistrationId& registration_id,
-                      bool aborted_by_developer);
+  // Called when a the given |controller| has finished processing its job.
+  void DidCompleteJob(BackgroundFetchJobController* controller);
 
   // |this| is owned by the BrowserContext via the StoragePartitionImpl.
   BrowserContext* browser_context_;
   StoragePartitionImpl* storage_partition_;
 
   scoped_refptr<ServiceWorkerContextWrapper> service_worker_context_;
   std::unique_ptr<BackgroundFetchDataManager> background_fetch_data_manager_;
 
   // Map of the Background Fetch fetches that are currently in-progress.
   std::map<BackgroundFetchRegistrationId,
            std::unique_ptr<BackgroundFetchJobController>>
       active_fetches_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundFetchContext);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_CONTEXT_H_