Simplify IqRequest interface.

remoting/jingle_glue/iq_request_unittest.cc

Index: remoting/jingle_glue/iq_request_unittest.cc
diff --git a/remoting/jingle_glue/iq_request_unittest.cc b/remoting/jingle_glue/iq_request_unittest.cc
index 4b323fb3e3fc020ec51e9275b09a88789247b9da..d7eeda60931feb2ec8a99ef1d652877cc49cb9c6 100644
--- a/remoting/jingle_glue/iq_request_unittest.cc
+++ b/remoting/jingle_glue/iq_request_unittest.cc
@@ -31,7 +31,8 @@ TEST(IqRequestTest, MakeIqStanza) {
   buzz::XmlElement* iq_body =
       new buzz::XmlElement(buzz::QName(kNamespace, kBodyTag));
   scoped_ptr<buzz::XmlElement> stanza(
-      IqRequest::MakeIqStanza(kType, kTo, iq_body, kMessageId));
+      IqRequest::MakeIqStanza(kType, kTo, iq_body));
+  stanza->AddAttr(buzz::QName("", "id"), kMessageId);
 
   EXPECT_EQ(expected_xml_string, stanza->Str());
 }