[BackgroundSync] Remove BackgroundSyncRegistrationHandle

content/browser/background_sync/background_sync_registration_handle.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_BROWSER_BACKGROUND_SYNC_BACKGROUND_SYNC_REGISTRATION_HANDLE_H_
-#define CONTENT_BROWSER_BACKGROUND_SYNC_BACKGROUND_SYNC_REGISTRATION_HANDLE_H_
-
-#include <stdint.h>
-
-#include "base/callback.h"
-#include "base/logging.h"
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "content/browser/background_sync/background_sync_registration.h"
-#include "content/browser/background_sync/background_sync_status.h"
-#include "content/common/background_sync_service.mojom.h"
-#include "content/common/content_export.h"
-
-namespace content {
-
-class BackgroundSyncManager;
-
-// Handle to BackgroundSyncRegistration that is exposed to clients. Each
-// BackgroundSyncRegistrationHandle is given a unique handle id (by the
-// BackgroundSyncManager) which is released at destruction.
-// BackgroundSyncRegistrationHandle objects must not be used (but may be
-// destroyed) after the BackgroundSyncManager has been deleted.
-class CONTENT_EXPORT BackgroundSyncRegistrationHandle {
- public:
-  using HandleId = int64_t;
-  using StatusCallback = base::Callback<void(BackgroundSyncStatus)>;
-  using StatusAndStateCallback =
-      base::Callback<void(BackgroundSyncStatus, BackgroundSyncState)>;
-
-  ~BackgroundSyncRegistrationHandle();
-
-  const BackgroundSyncRegistrationOptions* options() const {
-    DCHECK(background_sync_manager_);
-    return registration_->options();
-  }
-
-  BackgroundSyncState sync_state() const {
-    DCHECK(background_sync_manager_);
-    return registration_->sync_state();
-  }
-
-  // Returns true if the handle is backed by a BackgroundSyncRegistration in the
-  // BackgroundSyncManager.
-  bool IsValid() const;
-
-  HandleId handle_id() const { return handle_id_; }
-
- private:
-  friend class BackgroundSyncManager;
-
-  BackgroundSyncRegistrationHandle(
-      base::WeakPtr<BackgroundSyncManager> background_sync_manager,
-      HandleId handle_id);
-
-  BackgroundSyncRegistration* registration() {
-    DCHECK(background_sync_manager_);
-    return registration_;
-  }
-
-  // The BackgroundSyncManager is expected to remain alive for all operations
-  // except for possibly at destruction.
-  base::WeakPtr<BackgroundSyncManager> background_sync_manager_;
-
-  // Each BackgroundSyncRegistrationHandle is assigned a unique handle id.
-  // The BackgroundSyncManager maps the id to an internal pointer.
-  HandleId handle_id_;
-
-  // This is owned by background_sync_manager_ and is valid until handle_id_ is
-  // released in the destructor or background_sync_manager_ has been destroyed.
-  BackgroundSyncRegistration* registration_;
-
-  DISALLOW_COPY_AND_ASSIGN(BackgroundSyncRegistrationHandle);
-};
-
-}  // namespace
-
-#endif  // CONTENT_BROWSER_BACKGROUND_SYNC_BACKGROUND_SYNC_REGISTRATION_HANDLE_H_