Connect BackgroundFetch to the OfflineItemCollection

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 <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 content {
 
+class BackgroundFetchClientProxy;
 class BackgroundFetchDataManager;
 class BackgroundFetchJobController;
 struct BackgroundFetchOptions;
 class BackgroundFetchRegistrationId;
 class BrowserContext;
 class ServiceWorkerContextWrapper;
 struct ServiceWorkerFetchRequest;
 class StoragePartitionImpl;
 
 // The BackgroundFetchContext is the central moderator of ongoing background
@@ skipping 16 matching lines @@
 
   // Starts a Background Fetch for the |registration_id|. The |requests| will be
   // asynchronously fetched. The |callback| will be invoked when the fetch has
   // been registered, or an error occurred that avoids it from doing so.
   void StartFetch(
       const BackgroundFetchRegistrationId& registration_id,
       const std::vector<ServiceWorkerFetchRequest>& requests,
       const BackgroundFetchOptions& options,
       const blink::mojom::BackgroundFetchService::FetchCallback& callback);
 
+  // Cancels the Background Fetch for the |registration_id| and triggers the
+  // 'backgroundfetchabort' to be sent to the associated service worker.

[Peter Beverloo, 2017/03/31 01:32:23]

+event

[harkness, 2017/03/31 10:11:44]

Done.

+  void CancelFetch(const BackgroundFetchRegistrationId& registration_id);
+
+  // Pauses the Background Fetch for the |registration_id|. If the fetch was
+  // already paused, this has no effect.
+  void PauseFetch(const BackgroundFetchRegistrationId& registration_id);
+
+  // Resumes the previously paused Background Fetch for the |registration_id|.
+  // If the fetch was not paused, this has no effect.
+  void ResumeFetch(const BackgroundFetchRegistrationId& registration_id);
+
  private:
   friend class base::DeleteHelper<BackgroundFetchContext>;
   friend struct BrowserThread::DeleteOnThread<BrowserThread::UI>;
   friend class base::RefCountedThreadSafe<BackgroundFetchContext,
                                           BrowserThread::DeleteOnUIThread>;
 
   ~BackgroundFetchContext();
 
   // Shuts down the active Job Controllers on the IO thread.
   void ShutdownOnIO();
@@ skipping 19 matching lines @@
   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_;
 
+  // The proxy will dispatch BackgroundFetchClient calls to the UI thread.
+  std::unique_ptr<BackgroundFetchClientProxy> client_proxy_;
+
   DISALLOW_COPY_AND_ASSIGN(BackgroundFetchContext);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_CONTEXT_H_