BackgroundSyncManager tracks client registrations

content/child/background_sync/background_sync_provider_thread_proxy.h

 // Copyright 2015 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_CHILD_BACKGROUND_SYNC_BACKGROUND_SYNC_PROVIDER_THREAD_PROXY_H_
 #define CONTENT_CHILD_BACKGROUND_SYNC_BACKGROUND_SYNC_PROVIDER_THREAD_PROXY_H_
 
 #include "base/macros.h"
 #include "content/child/worker_task_runner.h"
+#include "content/common/background_sync_service.mojom.h"
 #include "content/public/child/worker_thread.h"
 #include "third_party/WebKit/public/platform/modules/background_sync/WebSyncProvider.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
 namespace content {
 
 class BackgroundSyncProvider;
@@ skipping 30 matching lines @@
       blink::WebServiceWorkerRegistration* service_worker_registration,
       blink::WebSyncRegistrationCallbacks* callbacks);
   void getRegistrations(
       blink::WebSyncRegistration::Periodicity periodicity,
       blink::WebServiceWorkerRegistration* service_worker_registration,
       blink::WebSyncGetRegistrationsCallbacks* callbacks);
   void getPermissionStatus(
       blink::WebSyncRegistration::Periodicity periodicity,
       blink::WebServiceWorkerRegistration* service_worker_registration,
       blink::WebSyncGetPermissionStatusCallbacks* callbacks);
+  void releaseRegistration(int64_t handle_id);
+
+  // Given |handle_id|, ask the provider for a new handle with the same
+  // underlying registration.
+  void DuplicateRegistrationHandle(
+      int64 handle_id,
+      const BackgroundSyncService::DuplicateRegistrationHandleCallback&
+          callback);
 
   // WorkerThread::Observer implementation.
   void WillStopCurrentWorkerThread() override;
 
  private:
   BackgroundSyncProviderThreadProxy(
       base::SingleThreadTaskRunner* main_thread_task_runner,
       BackgroundSyncProvider* sync_provider);
 
   virtual ~BackgroundSyncProviderThreadProxy();
 
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
 
   // This belongs to the renderer main thread, (created by BlinkPlatformImpl)
   // and so should outlive the BackgroundSyncProviderThreadProxy, which is
   // created for a worker thread.
   BackgroundSyncProvider* sync_provider_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundSyncProviderThreadProxy);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_BACKGROUND_SYNC_BACKGROUND_SYNC_PROVIDER_THREAD_PROXY_H_