Simplify IqRequest interface.

remoting/jingle_glue/iq_request.cc

 // Copyright (c) 2011 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 "remoting/jingle_glue/iq_request.h"
 
 #include "third_party/libjingle/source/talk/xmllite/xmlelement.h"
 #include "third_party/libjingle/source/talk/xmpp/constants.h"
 
 namespace remoting {
 
 // static
 buzz::XmlElement* IqRequest::MakeIqStanza(const std::string& type,
                                           const std::string& addressee,
-                                          buzz::XmlElement* iq_body,
-                                          const std::string& id) {
+                                          buzz::XmlElement* iq_body) {
   buzz::XmlElement* stanza = new buzz::XmlElement(buzz::QN_IQ);
   stanza->AddAttr(buzz::QN_TYPE, type);
   if (!addressee.empty())
     stanza->AddAttr(buzz::QN_TO, addressee);
-  stanza->AddAttr(buzz::QN_ID, id);
   stanza->AddElement(iq_body);
   return stanza;
 }
 
 }  // namespace remoting