Use new callbacks in the IqRequest interface.

remoting/jingle_glue/iq_request.h

 // 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.
 
 #ifndef REMOTING_JINGLE_GLUE_IQ_REQUEST_H_
 #define REMOTING_JINGLE_GLUE_IQ_REQUEST_H_
 
 #include <string>
 
-#include "base/callback_old.h"
+#include "base/callback.h"
 #include "base/gtest_prod_util.h"
 
 namespace buzz {
 class XmlElement;
 }  // namespace buzz
 
 namespace remoting {
 
 // IqRequest class can be used to send an IQ stanza and then receive reply
 // stanza for that request. It sends outgoing stanza when SendIq() is called,
 // after that it forwards incoming reply stanza to the callback set with
 // set_callback(). If each call to SendIq() will yield one invocation of the
 // callback with the response.
 class IqRequest {
  public:
-  typedef Callback1<const buzz::XmlElement*>::Type ReplyCallback;
+  typedef base::Callback<void(const buzz::XmlElement*)> ReplyCallback;
 
   IqRequest() {}
   virtual ~IqRequest() {}
 
   // Sends stanza of type |type| to |addressee|. |iq_body| contains body of
-  // the stanza. Ownership of |iq_body| is transfered to IqRequest. Must
-  // be called on the jingle thread.
+  // the stanza. Takes pwnership of |iq_body|.
   virtual void SendIq(const std::string& type, const std::string& addressee,
                       buzz::XmlElement* iq_body) = 0;
 
-  // Sets callback that is called when reply stanza is received. Callback
-  // is called on the jingle thread.
-  virtual void set_callback(ReplyCallback* callback) = 0;
+  // Sets callback that is called when reply stanza is received.
+  virtual void set_callback(const ReplyCallback& callback) = 0;
 
  protected:
   static buzz::XmlElement* MakeIqStanza(const std::string& type,
                                         const std::string& addressee,
                                         buzz::XmlElement* iq_body,
                                         const std::string& id);
 
  private:
   FRIEND_TEST_ALL_PREFIXES(IqRequestTest, MakeIqStanza);
 
   DISALLOW_COPY_AND_ASSIGN(IqRequest);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_JINGLE_GLUE_IQ_REQUEST_H_