Mac: Make ScopedTypeRef require explicit constructors

chrome/browser/local_discovery/service_discovery_client_mac_unittest.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 #include <stdint.h>
 
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #include "base/bind.h"
 #include "base/mac/scoped_nsobject.h"
@@ skipping 122 matching lines @@
   net::SockaddrStorage storage;
   ASSERT_TRUE(endpoint.ToSockAddr(storage.addr, &storage.addr_len));
   NSData* discoveryHost =
       [NSData dataWithBytes:storage.addr length:storage.addr_len];
   NSArray* addresses = @[ discoveryHost ];
   [test_service setAddresses:addresses];
 
   ServiceResolverImplMac* resolver_impl =
       static_cast<ServiceResolverImplMac*>(resolver.get());
   resolver_impl->GetContainerForTesting()->SetServiceForTesting(
-      test_service.release());
+      base::scoped_nsobject<NSNetService>(test_service));
   resolver->StartResolving();
 
   resolver_impl->GetContainerForTesting()->OnResolveUpdate(
       ServiceResolver::STATUS_SUCCESS);
 
   base::MessageLoop::current()->RunUntilIdle();
 
   EXPECT_EQ(1, num_resolves_);
   EXPECT_EQ(2u, last_service_description_.metadata.size());
   EXPECT_EQ(ip_address, last_service_description_.ip_address);
   EXPECT_EQ(kPort, last_service_description_.address.port());
   EXPECT_EQ(kIp, last_service_description_.address.host());
 }
 
 }  // namespace local_discovery