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

mojo/edk/system/ports/node.cc

Index: mojo/edk/system/ports/node.cc
diff --git a/mojo/edk/system/ports/node.cc b/mojo/edk/system/ports/node.cc
index 266ee84b4f5d9ce558ec7061a9afcfb45f0ca86a..3324397f76ad1373bcc4a2a5e9bc3f1e29dac684 100644
--- a/mojo/edk/system/ports/node.cc
+++ b/mojo/edk/system/ports/node.cc
@@ -6,6 +6,8 @@
 
 #include <string.h>
 
+#include <utility>
+
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/lock.h"
@@ -269,7 +271,7 @@ int Node::GetMessageIf(const PortRef& port_ref,
     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.