Stop passing const-reference of SWRegistration in all GetRegistrationsCallbacks.

content/browser/service_worker/service_worker_dispatcher_host.cc

 // 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.
 
 #include "content/browser/service_worker/service_worker_dispatcher_host.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 1267 matching lines @@
   Send(new ServiceWorkerMsg_ServiceWorkerUnregistered(thread_id,
                                                       request_id,
                                                       is_success));
 }
 
 void ServiceWorkerDispatcherHost::GetRegistrationComplete(
     int thread_id,
     int provider_id,
     int request_id,
     ServiceWorkerStatusCode status,
-    const scoped_refptr<ServiceWorkerRegistration>& registration) {
+    scoped_refptr<ServiceWorkerRegistration> registration) {
   TRACE_EVENT_ASYNC_END2(
       "ServiceWorker", "ServiceWorkerDispatcherHost::GetRegistration",
       request_id, "Status", status, "Registration ID",
       registration ? registration->id() : kInvalidServiceWorkerRegistrationId);
   if (!GetContext())
     return;
 
   ServiceWorkerProviderHost* provider_host =
       GetContext()->GetProviderHost(render_process_id_, provider_id);
   if (!provider_host)
@@ skipping 108 matching lines @@
   if (!handle) {
     bad_message::ReceivedBadMessage(this,
                                     bad_message::SWDH_TERMINATE_BAD_HANDLE);
     return;
   }
   handle->version()->StopWorker(
       base::Bind(&ServiceWorkerUtils::NoOpStatusCallback));
 }
 
 }  // namespace content