mac: Make Mach port scopers better ScopedGenerics

ipc/attachment_broker_unprivileged_mac.cc

 // Copyright 2015 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 "ipc/attachment_broker_unprivileged_mac.h"
 
 #include <mach/mach.h>
 
 #include "base/mac/scoped_mach_port.h"
 #include "base/process/process.h"
@@ skipping 72 matching lines @@
 
 void AttachmentBrokerUnprivilegedMac::OnMachPortHasBeenDuplicated(
     const IPC::internal::MachPortAttachmentMac::WireFormat& wire_format) {
   // The IPC message was intended for a different process. Ignore it.
   if (wire_format.destination_process != base::Process::Current().Pid()) {
     // TODO(erikchen): UMA metric.
     return;
   }
 
   base::mac::ScopedMachReceiveRight message_port(wire_format.mach_port);
-  base::mac::ScopedMachSendRight memory_object(ReceiveMachPort(message_port));
+  base::mac::ScopedMachSendRight memory_object(
+      ReceiveMachPort(message_port.get()));
   IPC::internal::MachPortAttachmentMac::WireFormat translated_wire_format(
       memory_object.release(), wire_format.destination_process,
       wire_format.attachment_id);
 
   scoped_refptr<BrokerableAttachment> attachment(
       new IPC::internal::MachPortAttachmentMac(translated_wire_format));
   HandleReceivedAttachment(attachment);
 }
 
 }  // namespace IPC