Use mojo to connect to BackgroundSyncManager object

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;
-
-// BackgroundSyncProviderThreadProxy is a proxy to the BackgroundSyncProvider
-// for callers running on a different thread than the main thread. There is one
-// instance per worker thread.
-//
-// This class handles all of the thread switching, jumping to the main thread to
-// call the WebSyncProvider methods, and wrapping the callbacks passed in with
-// code to switch back to the original calling thread.
-class BackgroundSyncProviderThreadProxy : public blink::WebSyncProvider,
-                                          public WorkerThread::Observer {
- public:
-  using DuplicateRegistrationHandleCallback =
-      base::Callback<void(BackgroundSyncError, SyncRegistrationPtr)>;
-
-  static BackgroundSyncProviderThreadProxy* GetThreadInstance(
-      base::SingleThreadTaskRunner* main_thread_task_runner,
-      BackgroundSyncProvider* permissions_dispatcher);
-
-  // blink::WebSyncProvider implementation
-  void registerBackgroundSync(
-      const blink::WebSyncRegistration* options,
-      blink::WebServiceWorkerRegistration* service_worker_registration,
-      bool requested_from_service_worker,
-      blink::WebSyncRegistrationCallbacks* callbacks) override;
-  void unregisterBackgroundSync(
-      int64_t handle_id,
-      blink::WebServiceWorkerRegistration* service_worker_registration,
-      blink::WebSyncUnregistrationCallbacks* callbacks) override;
-  void getRegistration(
-      blink::WebSyncRegistration::Periodicity,
-      const blink::WebString& tag,
-      blink::WebServiceWorkerRegistration* service_worker_registration,
-      blink::WebSyncRegistrationCallbacks* callbacks) override;
-  void getRegistrations(
-      blink::WebSyncRegistration::Periodicity periodicity,
-      blink::WebServiceWorkerRegistration* service_worker_registration,
-      blink::WebSyncGetRegistrationsCallbacks* callbacks) override;
-  void getPermissionStatus(
-      blink::WebSyncRegistration::Periodicity periodicity,
-      blink::WebServiceWorkerRegistration* service_worker_registration,
-      blink::WebSyncGetPermissionStatusCallbacks* callbacks) override;
-  void releaseRegistration(int64_t handle_id) override;
-  void notifyWhenDone(
-      int64_t handle_id,
-      blink::WebSyncNotifyWhenDoneCallbacks* callbacks) override;
-
-  // Given |handle_id|, ask the provider for a new handle with the same
-  // underlying registration.
-  void DuplicateRegistrationHandle(
-      int64_t handle_id,
-      const DuplicateRegistrationHandleCallback& callback);
-
-  // WorkerThread::Observer implementation.
-  void WillStopCurrentWorkerThread() override;
-
- private:
-  BackgroundSyncProviderThreadProxy(
-      base::SingleThreadTaskRunner* main_thread_task_runner,
-      BackgroundSyncProvider* sync_provider);
-
-  ~BackgroundSyncProviderThreadProxy() override;
-
-  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_