Stop passing const-reference of SWRegistration in all GetRegistrationsCallbacks.

content/browser/service_worker/service_worker_context_core.h

 // Copyright 2013 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_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_CORE_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_CORE_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 315 matching lines @@
   void DidGetAllRegistrationsForUnregisterForOrigin(
       const UnregistrationCallback& result,
       const GURL& origin,
       ServiceWorkerStatusCode status,
       const std::vector<ServiceWorkerRegistrationInfo>& registrations);
 
   void DidFindRegistrationForCheckHasServiceWorker(
       const GURL& other_url,
       const ServiceWorkerContext::CheckHasServiceWorkerCallback callback,
       ServiceWorkerStatusCode status,
-      const scoped_refptr<ServiceWorkerRegistration>& registration);
+      scoped_refptr<ServiceWorkerRegistration> registration);
   void OnRegistrationFinishedForCheckHasServiceWorker(
       const ServiceWorkerContext::CheckHasServiceWorkerCallback callback,
-      const scoped_refptr<ServiceWorkerRegistration>& registration);
+      scoped_refptr<ServiceWorkerRegistration> registration);
 
   // It's safe to store a raw pointer instead of a scoped_refptr to |wrapper_|
   // because the Wrapper::Shutdown call that hops threads to destroy |this| uses
   // Bind() to hold a reference to |wrapper_| until |this| is fully destroyed.
   ServiceWorkerContextWrapper* wrapper_;
   std::unique_ptr<ProcessToProviderMap> providers_;
   std::unique_ptr<ProviderByClientUUIDMap> provider_by_uuid_;
   std::unique_ptr<ServiceWorkerStorage> storage_;
   scoped_refptr<EmbeddedWorkerRegistry> embedded_worker_registry_;
   std::unique_ptr<ServiceWorkerJobCoordinator> job_coordinator_;
@@ skipping 18 matching lines @@
   scoped_refptr<base::ObserverListThreadSafe<ServiceWorkerContextObserver>>
       observer_list_;
   base::WeakPtrFactory<ServiceWorkerContextCore> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerContextCore);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_CORE_H_