[Background Sync] Use Mojo IPC to fire background sync events

content/renderer/background_sync/background_sync_client_impl.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/renderer/background_sync/background_sync_client_impl.h"
+
+#include "content/renderer/service_worker/service_worker_context_client.h"
+
+namespace content {
+
+// static
+void BackgroundSyncClientImpl::Create(
+    mojo::InterfaceRequest<BackgroundSyncServiceClient> request) {
+  new BackgroundSyncClientImpl(request.Pass());
+}
+
+BackgroundSyncClientImpl::~BackgroundSyncClientImpl() {}
+
+BackgroundSyncClientImpl::BackgroundSyncClientImpl(
+    mojo::InterfaceRequest<BackgroundSyncServiceClient> request)
+    : binding_(this, request.Pass()) {}
+
+void BackgroundSyncClientImpl::Sync(content::SyncRegistrationPtr registration,
+                                    const SyncCallback& callback) {
+  ServiceWorkerContextClient* client =
+      ServiceWorkerContextClient::ThreadSpecificInstance();
+  if (!client) {
+    callback.Run(SERVICE_WORKER_EVENT_STATUS_ABORTED);
+    return;
+  }
+  client->DispatchSyncEvent(callback);
+}
+
+}  // namespace content