BackgroundSync sync events need to be ExtendableEvents, content side cleanup

content/renderer/service_worker/service_worker_context_client.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/service_worker/service_worker_context_client.h"
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 500 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));
 }
 
-// TODO(chasej): crbug.com/486890 - Remove when matching blink changes land
-void ServiceWorkerContextClient::didHandleSyncEvent(int request_id) {
-  didHandleSyncEvent(request_id, blink::WebServiceWorkerEventResultCompleted);
-}
-
 void ServiceWorkerContextClient::didHandleSyncEvent(
     int request_id,
     blink::WebServiceWorkerEventResult result) {
   Send(new ServiceWorkerHostMsg_SyncEventFinished(GetRoutingID(), request_id,
                                                   result));
 }
 
 void ServiceWorkerContextClient::didHandleCrossOriginConnectEvent(
     int request_id,
     bool accept_connection) {
@@ skipping 440 matching lines @@
 }
 
 base::WeakPtr<ServiceWorkerContextClient>
 ServiceWorkerContextClient::GetWeakPtr() {
   DCHECK(worker_task_runner_->RunsTasksOnCurrentThread());
   DCHECK(context_);
   return context_->weak_factory.GetWeakPtr();
 }
 
 }  // namespace content