Stop passing const-reference of SWRegistration in all GetRegistrationsCallbacks.

content/browser/service_worker/service_worker_unregister_job.cc

 // Copyright 2014 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_unregister_job.h"
 
 #include "base/memory/weak_ptr.h"
 #include "content/browser/service_worker/service_worker_context_core.h"
 #include "content/browser/service_worker/service_worker_job_coordinator.h"
 #include "content/browser/service_worker/service_worker_registration.h"
@@ skipping 39 matching lines @@
     return false;
   return static_cast<ServiceWorkerUnregisterJob*>(job)->pattern_ == pattern_;
 }
 
 RegistrationJobType ServiceWorkerUnregisterJob::GetType() const {
   return UNREGISTRATION_JOB;
 }
 
 void ServiceWorkerUnregisterJob::OnRegistrationFound(
     ServiceWorkerStatusCode status,
-    const scoped_refptr<ServiceWorkerRegistration>& registration) {
+    scoped_refptr<ServiceWorkerRegistration> registration) {
   if (status == SERVICE_WORKER_ERROR_NOT_FOUND) {
     DCHECK(!registration.get());
     Complete(kInvalidServiceWorkerRegistrationId,
              SERVICE_WORKER_ERROR_NOT_FOUND);
     return;
   }
 
   if (status != SERVICE_WORKER_OK || registration->is_uninstalling()) {
     Complete(kInvalidServiceWorkerRegistrationId, status);
     return;
@@ skipping 28 matching lines @@
   DCHECK(!is_promise_resolved_);
   is_promise_resolved_ = true;
   for (std::vector<UnregistrationCallback>::iterator it = callbacks_.begin();
        it != callbacks_.end();
        ++it) {
     it->Run(registration_id, status);
   }
 }
 
 }  // namespace content