BackgroundSyncManager tracks client registrations

content/browser/background_sync/background_sync_registration_handle.cc

+// 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.
+
+#include "content/browser/background_sync/background_sync_registration_handle.h"
+
+#include "content/browser/background_sync/background_sync_manager.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace content {
+
+BackgroundSyncRegistrationHandle::BackgroundSyncRegistrationHandle(
+    base::WeakPtr<BackgroundSyncManager> background_sync_manager,
+    HandleId handle_id)
+    : background_sync_manager_(background_sync_manager),
+      handle_id_(handle_id),
+      registration_(
+          background_sync_manager_->GetRegistrationForHandle(handle_id_)) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  DCHECK(background_sync_manager_);
+}
+
+BackgroundSyncRegistrationHandle::~BackgroundSyncRegistrationHandle() {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  if (IsValid() && background_sync_manager_)
+    background_sync_manager_->ReleaseRegistrationHandle(handle_id_);
+}
+
+void BackgroundSyncRegistrationHandle::Unregister(
+    int64_t sw_registration_id,
+    const StatusCallback& callback) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  DCHECK(IsValid());
+  DCHECK(background_sync_manager_);
+
+  background_sync_manager_->Unregister(
+      sw_registration_id, options()->periodicity, handle_id_, callback);
+}
+
+bool BackgroundSyncRegistrationHandle::IsValid() const {
+  return registration_ != nullptr;

[michaeln, 2015/08/28 02:53:11]

maybe test background_sync_mgr_ && registration_

+}
+
+}  // namespace content