[mojo-edk] Move the selector in Node::GetMessageIf instead of copying it.

mojo/edk/system/ports/node.cc

 // Copyright 2016 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 "mojo/edk/system/ports/node.h"
 
 #include <string.h>
 
+#include <utility>
+
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/lock.h"
 #include "mojo/edk/system/ports/node_delegate.h"
 
 namespace mojo {
 namespace edk {
 namespace ports {
 
 namespace {
@@ skipping 243 matching lines @@
     // This could also be treated like the port being unknown since the
     // embedder should no longer be referring to a port that has been sent.
     if (port->state != Port::kReceiving)
       return ERROR_PORT_STATE_UNEXPECTED;
 
     // Let the embedder get messages until there are no more before reporting
     // that the peer closed its end.
     if (!CanAcceptMoreMessages(port))
       return ERROR_PORT_PEER_CLOSED;
 
-    port->message_queue.GetNextMessageIf(selector, message);
+    port->message_queue.GetNextMessageIf(std::move(selector), message);
   }
 
   // Allow referenced ports to trigger PortStatusChanged calls.
   if (*message) {
     for (size_t i = 0; i < (*message)->num_ports(); ++i) {
       const PortName& new_port_name = (*message)->ports()[i];
       scoped_refptr<Port> new_port = GetPort(new_port_name);
 
       DCHECK(new_port) << "Port " << new_port_name << "@" << name_
                        << " does not exist!";
@@ skipping 921 matching lines @@
 
   if (num_data_bytes)
     memcpy(header + 1, data, num_data_bytes);
 
   return message;
 }
 
 }  // namespace ports
 }  // namespace edk
 }  // namespace mojo