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

content/child/service_worker/service_worker_provider_context.h

Index: content/child/service_worker/service_worker_provider_context.h
diff --git a/content/child/service_worker/service_worker_provider_context.h b/content/child/service_worker/service_worker_provider_context.h
index e858ea9e743e843e544d1913fa2b11e0312fcb9c..264bcc946644361e909ca1423249303f3a89f62e 100644
--- a/content/child/service_worker/service_worker_provider_context.h
+++ b/content/child/service_worker/service_worker_provider_context.h
@@ -48,9 +48,12 @@ class ServiceWorkerProviderContext
   int provider_id() const { return provider_id_; }
 
   ServiceWorkerHandleReference* controller();
-  ServiceWorkerRegistrationHandleReference* registration();
 
-  ServiceWorkerVersionAttributes GetVersionAttributes();
+  bool IsAssociatedWithRegistration();
+
+  void GetRegistrationInfoAndVersionAttributes(
+      ServiceWorkerRegistrationObjectInfo* info,
+      ServiceWorkerVersionAttributes* attrs);
   void SetVersionAttributes(ChangedVersionAttributesMask mask,
                             const ServiceWorkerVersionAttributes& attrs);