[Background Fetch] Tidy up getting/activating pending requests

content/browser/background_fetch/background_fetch_job_controller.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_JOB_CONTROLLER_H_
 #define CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_JOB_CONTROLLER_H_
 
 #include <memory>
 #include <string>
 #include <unordered_map>
@@ skipping 30 matching lines @@
   BackgroundFetchJobController(
       const BackgroundFetchRegistrationId& registration_id,
       const BackgroundFetchOptions& options,
       BackgroundFetchDataManager* data_manager,
       BrowserContext* browser_context,
       scoped_refptr<net::URLRequestContextGetter> request_context,
       CompletedCallback completed_callback,
       const net::NetworkTrafficAnnotationTag& traffic_annotation);
   ~BackgroundFetchJobController();
 
-  // Starts fetching the |initial_fetches|. The controller will continue to
+  // Starts fetching the first few requests. The controller will continue to
   // fetch new content until all requests have been handled.
-  void Start(
-      std::vector<scoped_refptr<BackgroundFetchRequestInfo>> initial_requests);
+  void Start();
 
   // Updates the representation of this Background Fetch in the user interface
   // to match the given |title|.
   void UpdateUI(const std::string& title);
 
   // Immediately aborts this Background Fetch by request of the developer.
   void Abort();
 
   // Returns the current state of this Job Controller.
   State state() const { return state_; }
@@ skipping 51 matching lines @@
   const net::NetworkTrafficAnnotationTag traffic_annotation_;
 
   base::WeakPtrFactory<BackgroundFetchJobController> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundFetchJobController);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_JOB_CONTROLLER_H_