Migrate part of the BackgroundFetchJobController to the UI thread

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>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/browser_thread.h"
 #include "third_party/WebKit/public/platform/modules/background_fetch/background_fetch.mojom.h"
 
+namespace net {
+class URLRequestContextGetter;
+}
+
 namespace url {
 class Origin;
 }
 
 namespace content {
 
 class BackgroundFetchDataManager;
 class BackgroundFetchJobController;
 struct BackgroundFetchOptions;
 class BackgroundFetchRegistrationId;
@@ skipping 64 matching lines @@
   void DidCreateRegistration(
       const BackgroundFetchRegistrationId& registration_id,
       const BackgroundFetchOptions& options,
       const blink::mojom::BackgroundFetchService::FetchCallback& callback,
       blink::mojom::BackgroundFetchError error,
       std::vector<BackgroundFetchRequestInfo> initial_requests);
 
   // Called when a the given |controller| has finished processing its job.
   void DidCompleteJob(BackgroundFetchJobController* controller);
 
-  // |this| is owned by the BrowserContext via the StoragePartitionImpl.
+  // |this| is owned, indirectly, by the BrowserContext.
   BrowserContext* browser_context_;
-  StoragePartitionImpl* storage_partition_;
   DownloadManager* download_manager_;
 
   scoped_refptr<ServiceWorkerContextWrapper> service_worker_context_;
+  scoped_refptr<net::URLRequestContextGetter> request_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_