Stop passing const-reference of SWRegistration in all GetRegistrationsCallbacks.

content/browser/service_worker/service_worker_dispatcher_host.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_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_DISPATCHER_HOST_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 195 matching lines @@
                       const std::string& status_message,
                       int64_t registration_id);
   void UnregistrationComplete(int thread_id,
                               int request_id,
                               ServiceWorkerStatusCode status);
   void GetRegistrationComplete(
       int thread_id,
       int provider_id,
       int request_id,
       ServiceWorkerStatusCode status,
-      const scoped_refptr<ServiceWorkerRegistration>& registration);
+      scoped_refptr<ServiceWorkerRegistration> registration);
   void GetRegistrationsComplete(
       int thread_id,
       int provider_id,
       int request_id,
       ServiceWorkerStatusCode status,
       const std::vector<scoped_refptr<ServiceWorkerRegistration>>&
           registrations);
   void GetRegistrationForReadyComplete(
       int thread_id,
       int request_id,
@@ skipping 15 matching lines @@
 
   bool channel_ready_;  // True after BrowserMessageFilter::sender_ != NULL.
   std::vector<std::unique_ptr<IPC::Message>> pending_messages_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerDispatcherHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_DISPATCHER_HOST_H_