ServiceWorker: Get registration info and its version attributes in one lock operation

content/child/service_worker/service_worker_provider_context.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_CHILD_SERVICE_WORKER_SERVICE_WORKER_PROVIDER_CONTEXT_H_
 #define CONTENT_CHILD_SERVICE_WORKER_SERVICE_WORKER_PROVIDER_CONTEXT_H_
 
 #include <set>
 #include <vector>
 
@@ skipping 30 matching lines @@
   void OnAssociateRegistration(const ServiceWorkerRegistrationObjectInfo& info,
                                const ServiceWorkerVersionAttributes& attrs);
   void OnDisassociateRegistration();
   void OnServiceWorkerStateChanged(int handle_id,
                                    blink::WebServiceWorkerState state);
   void OnSetControllerServiceWorker(const ServiceWorkerObjectInfo& info);
 
   int provider_id() const { return provider_id_; }
 
   ServiceWorkerHandleReference* controller();
-  ServiceWorkerRegistrationHandleReference* registration();
 
-  ServiceWorkerVersionAttributes GetVersionAttributes();
+  bool GetRegistrationInfoAndVersionAttributes(
+      ServiceWorkerRegistrationObjectInfo* info,
+      ServiceWorkerVersionAttributes* attrs);
   void SetVersionAttributes(ChangedVersionAttributesMask mask,
                             const ServiceWorkerVersionAttributes& attrs);
 
   // Gets the handle ID of the installing Service Worker, or
   // kInvalidServiceWorkerHandleId if the provider does not have a
   // installing Service Worker.
   int installing_handle_id() const;
 
   // Gets the handle ID of the waiting Service Worker, or
   // kInvalidServiceWorkerHandleId if the provider does not have a
@@ skipping 45 matching lines @@
 
 struct ServiceWorkerProviderContextDeleter {
   static void Destruct(const ServiceWorkerProviderContext* context) {
     context->DestructOnMainThread();
   }
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_SERVICE_WORKER_SERVICE_WORKER_PROVIDER_CONTEXT_H_