Use new callbacks in the IqRequest interface.

remoting/jingle_glue/javascript_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_JAVASCRIPT_IQ_REQUEST_H_
 #define REMOTING_JINGLE_GLUE_JAVASCRIPT_IQ_REQUEST_H_
 
 #include <map>
 
 #include "base/compiler_specific.h"
@@ skipping 36 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(JavascriptIqRegistry);
 };
 
 // This call must only be used on the thread it was created on.
 class JavascriptIqRequest : public IqRequest {
  public:
   JavascriptIqRequest(SignalStrategy* signal_strategy,
                       JavascriptIqRegistry* registry);
   virtual ~JavascriptIqRequest();
 
-  //  IqRequest interface.
+  // IqRequest interface.
   virtual void SendIq(const std::string& type, const std::string& addressee,
                       buzz::XmlElement* iq_body) OVERRIDE;
-  virtual void set_callback(ReplyCallback* callback) OVERRIDE;
+  virtual void set_callback(const ReplyCallback& callback) OVERRIDE;
 
  private:
   friend class JavascriptIqRegistry;
 
-  scoped_ptr<ReplyCallback> callback_;
+  ReplyCallback callback_;
   SignalStrategy* signal_strategy_;
   JavascriptIqRegistry* registry_;
 
   FRIEND_TEST_ALL_PREFIXES(IqRequestTest, MakeIqStanza);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_JINGLE_GLUE_JAVASCRIPT_IQ_REQUEST_H_