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

content/browser/service_worker/service_worker_browsertest.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 <stddef.h>
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <utility>
@@ skipping 116 matching lines @@
 
 base::Closure CreatePrepareReceiver(bool* is_prepared) {
   return base::Bind(&ReceivePrepareResult, is_prepared);
 }
 
 void ReceiveFindRegistrationStatus(
     BrowserThread::ID run_quit_thread,
     const base::Closure& quit,
     ServiceWorkerStatusCode* out_status,
     ServiceWorkerStatusCode status,
-    scoped_refptr<ServiceWorkerRegistration> registration) {
+    const scoped_refptr<ServiceWorkerRegistration>& registration) {
   *out_status = status;
   if (!quit.is_null())
     BrowserThread::PostTask(run_quit_thread, FROM_HERE, quit);
 }
 
 ServiceWorkerStorage::FindRegistrationCallback CreateFindRegistrationReceiver(
     BrowserThread::ID run_quit_thread,
     const base::Closure& quit,
     ServiceWorkerStatusCode* status) {
   return base::Bind(&ReceiveFindRegistrationStatus, run_quit_thread, quit,
@@ skipping 1271 matching lines @@
     wrapper()->FindReadyRegistrationForDocument(
         document_url,
         base::Bind(&ServiceWorkerBlackBoxBrowserTest::FindRegistrationOnIO2,
                    this, status, continuation));
   }
 
   void FindRegistrationOnIO2(
       ServiceWorkerStatusCode* out_status,
       const base::Closure& continuation,
       ServiceWorkerStatusCode status,
-      scoped_refptr<ServiceWorkerRegistration> registration) {
+      const scoped_refptr<ServiceWorkerRegistration>& registration) {
     *out_status = status;
     if (!registration.get())
       EXPECT_NE(SERVICE_WORKER_OK, status);
     continuation.Run();
   }
 };
 
 static int CountRenderProcessHosts() {
   int result = 0;
   for (RenderProcessHost::iterator iter(RenderProcessHost::AllHostsIterator());
@@ skipping 449 matching lines @@
  private:
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerV8CacheStrategiesAggressiveTest);
 };
 
 IN_PROC_BROWSER_TEST_F(ServiceWorkerV8CacheStrategiesAggressiveTest,
                        V8CacheOnCacheStorage) {
   CheckStrategyIsAggressive();
 }
 
 }  // namespace content