Revert of Stop passing const-reference of SWRegistration in all GetRegistrationsCallbacks.

content/browser/service_worker/service_worker_storage.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_STORAGE_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_STORAGE_H_
 
 #include <stdint.h>
 
 #include <deque>
@@ skipping 39 matching lines @@
 // This class provides an interface to store and retrieve ServiceWorker
 // registration data. The lifetime is equal to ServiceWorkerContextCore that is
 // an owner of this class. When a storage operation fails, this is marked as
 // disabled and all subsequent requests are aborted until the context core is
 // restarted.
 class CONTENT_EXPORT ServiceWorkerStorage
     : NON_EXPORTED_BASE(public ServiceWorkerVersion::Listener) {
  public:
   typedef std::vector<ServiceWorkerDatabase::ResourceRecord> ResourceList;
   typedef base::Callback<void(ServiceWorkerStatusCode status)> StatusCallback;
-  typedef base::Callback<void(
-      ServiceWorkerStatusCode status,
-      scoped_refptr<ServiceWorkerRegistration> registration)>
-      FindRegistrationCallback;
+  typedef base::Callback<void(ServiceWorkerStatusCode status,
+                              const scoped_refptr<ServiceWorkerRegistration>&
+                                  registration)> FindRegistrationCallback;
   typedef base::Callback<void(
       ServiceWorkerStatusCode status,
       const std::vector<scoped_refptr<ServiceWorkerRegistration>>&
           registrations)>
       GetRegistrationsCallback;
   typedef base::Callback<void(
       ServiceWorkerStatusCode status,
       const std::vector<ServiceWorkerRegistrationInfo>& registrations)>
       GetRegistrationsInfosCallback;
   using GetUserDataCallback =
@@ skipping 474 matching lines @@
   std::set<int64_t> pending_deletions_;
 
   base::WeakPtrFactory<ServiceWorkerStorage> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerStorage);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_STORAGE_H_