BackgroundSync sync events need to be ExtendableEvents, content side

content/renderer/service_worker/service_worker_script_context.cc

 // Copyright 2014 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/service_worker_script_context.h"
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 200 matching lines @@
     UMA_HISTOGRAM_MEDIUM_TIMES(
         "ServiceWorker.PushEvent.Time",
         base::TimeTicks::Now() - push_start_timings_[request_id]);
   }
   push_start_timings_.erase(request_id);
 
   Send(new ServiceWorkerHostMsg_PushEventFinished(
       GetRoutingID(), request_id, result));
 }
 
-void ServiceWorkerScriptContext::DidHandleSyncEvent(int request_id) {
-  Send(new ServiceWorkerHostMsg_SyncEventFinished(
-      GetRoutingID(), request_id));
+void ServiceWorkerScriptContext::DidHandleSyncEvent(
+    int request_id,
+    blink::WebServiceWorkerEventResult result) {
+  Send(new ServiceWorkerHostMsg_SyncEventFinished(GetRoutingID(), request_id,
+                                                  result));
 }
 
 void ServiceWorkerScriptContext::DidHandleCrossOriginConnectEvent(
     int request_id,
     bool accept_connection) {
   Send(new ServiceWorkerHostMsg_CrossOriginConnectEventFinished(
       GetRoutingID(), request_id, accept_connection));
 }
 
 void ServiceWorkerScriptContext::GetClients(
@@ skipping 386 matching lines @@
       new blink::WebServiceWorkerError(error_type, message));
   callbacks->onError(error.release());
   pending_claim_clients_callbacks_.Remove(request_id);
 }
 
 void ServiceWorkerScriptContext::OnPing() {
   Send(new ServiceWorkerHostMsg_Pong(GetRoutingID()));
 }
 
 }  // namespace content