[BackgroundSync] Remove BackgroundSyncRegistrationHandle

content/renderer/service_worker/service_worker_context_client.h

 // 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.
 
 #ifndef CONTENT_RENDERER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_CLIENT_H_
 #define CONTENT_RENDERER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_CLIENT_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 160 matching lines @@
                 const blink::WebURL&,
                 blink::WebServiceWorkerClientCallbacks*) override;
   void skipWaiting(
       blink::WebServiceWorkerSkipWaitingCallbacks* callbacks) override;
   void claim(blink::WebServiceWorkerClientsClaimCallbacks* callbacks) override;
   void registerForeignFetchScopes(
       const blink::WebVector<blink::WebURL>& sub_scopes,
       const blink::WebVector<blink::WebSecurityOrigin>& origins) override;
 
   virtual void DispatchSyncEvent(
-      const blink::WebSyncRegistration& registration,
+      const std::string& tag,
       blink::WebServiceWorkerContextProxy::LastChanceOption last_chance,
       const SyncCallback& callback);
 
  private:
   struct WorkerContextData;
 
   // Get routing_id for sending message to the ServiceWorkerVersion
   // in the browser process.
   int GetRoutingID() const { return embedded_worker_id_; }
 
@@ skipping 73 matching lines @@
   // Initialized on the worker thread in workerContextStarted and
   // destructed on the worker thread in willDestroyWorkerContext.
   scoped_ptr<WorkerContextData> context_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerContextClient);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_CLIENT_H_