BackgroundSync sync events need to be ExtendableEvents, content side

content/renderer/service_worker/embedded_worker_context_client.cc

 // Copyright 2013 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/service_worker/embedded_worker_context_client.h"
 
 #include <map>
 #include <string>
 
 #include "base/lazy_instance.h"
@@ skipping 316 matching lines @@
   script_context_->DidHandleNotificationClickEvent(request_id, result);
 }
 
 void EmbeddedWorkerContextClient::didHandlePushEvent(
     int request_id,
     blink::WebServiceWorkerEventResult result) {
   DCHECK(script_context_);
   script_context_->DidHandlePushEvent(request_id, result);
 }
 
+// TODO(chasej): crbug.com/486890 - Remove when matching blink changes land
 void EmbeddedWorkerContextClient::didHandleSyncEvent(int request_id) {
+  didHandleSyncEvent(request_id, blink::WebServiceWorkerEventResultCompleted);
+}
+
+void EmbeddedWorkerContextClient::didHandleSyncEvent(
+    int request_id,
+    blink::WebServiceWorkerEventResult result) {
   DCHECK(script_context_);
-  script_context_->DidHandleSyncEvent(request_id);
+  script_context_->DidHandleSyncEvent(request_id, result);
 }
 
 void EmbeddedWorkerContextClient::didHandleCrossOriginConnectEvent(
     int request_id,
     bool accept_connection) {
   DCHECK(script_context_);
   script_context_->DidHandleCrossOriginConnectEvent(request_id,
                                                     accept_connection);
 }
 
@@ skipping 120 matching lines @@
   registration->SetWaiting(
       dispatcher->GetServiceWorker(attrs.waiting, false));
   registration->SetActive(
       dispatcher->GetServiceWorker(attrs.active, false));
 
   script_context_->SetRegistrationInServiceWorkerGlobalScope(
       registration.Pass());
 }
 
 }  // namespace content