Stop passing const-reference of SWRegistration in all GetRegistrationsCallbacks.

content/browser/service_worker/foreign_fetch_request_handler.h

 // 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.
 
 #ifndef CONTENT_BROWSER_SERVICE_WORKER_FOREIGN_FETCH_REQUEST_HANDLER_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_FOREIGN_FETCH_REQUEST_HANDLER_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/supports_user_data.h"
@@ skipping 78 matching lines @@
       ResourceType resource_type,
       RequestContextType request_context_type,
       RequestContextFrameType frame_type,
       scoped_refptr<ResourceRequestBodyImpl> body);
 
   // Called when a ServiceWorkerRegistration has (or hasn't) been found for the
   // request being handled.
   void DidFindRegistration(
       const base::WeakPtr<ServiceWorkerURLRequestJob>& job,
       ServiceWorkerStatusCode status,
-      const scoped_refptr<ServiceWorkerRegistration>& registration);
+      scoped_refptr<ServiceWorkerRegistration> registration);
 
   // ServiceWorkerURLRequestJob::Delegate implementation:
   void OnPrepareToRestart() override;
   ServiceWorkerVersion* GetServiceWorkerVersion(
       ServiceWorkerMetrics::URLRequestJobResult* result) override;
 
   // Sets |job_| to nullptr, and clears all extra response info associated with
   // that job.
   void ClearJob();
 
@@ skipping 15 matching lines @@
   bool use_network_ = false;
 
   base::WeakPtrFactory<ForeignFetchRequestHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ForeignFetchRequestHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_FOREIGN_FETCH_REQUEST_HANDLER_H_