IPC: Remove unnecessary conversions of BrokerableAttachment.

ipc/ipc_channel_posix.cc

 // Copyright (c) 2012 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/ipc_channel_posix.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <stddef.h>
 #include <stdint.h>
@@ skipping 679 matching lines @@
     ClosePipeOnError();
   }
 }
 
 bool ChannelPosix::ProcessMessageForDelivery(Message* message) {
   // Sending a brokerable attachment requires a call to Channel::Send(), so
   // Send() may be re-entrant.
   if (message->HasBrokerableAttachments()) {
     DCHECK(GetAttachmentBroker());
     DCHECK(peer_pid_ != base::kNullProcessId);
-    for (BrokerableAttachment* attachment :
+    for (const scoped_refptr<IPC::BrokerableAttachment>& attachment :
          message->attachment_set()->GetBrokerableAttachments()) {
       if (!GetAttachmentBroker()->SendAttachmentToProcess(attachment,
                                                           peer_pid_)) {
         delete message;
         return false;
       }
     }
   }
 
 #ifdef IPC_MESSAGE_LOG_ENABLED
@@ skipping 408 matching lines @@
 }
 
 #if defined(OS_LINUX)
 // static
 void Channel::SetGlobalPid(int pid) {
   ChannelPosix::SetGlobalPid(pid);
 }
 #endif  // OS_LINUX
 
 }  // namespace IPC