Replace scoped_ptr with unique_ptr in webrtc/libjingle/

webrtc/libjingle/xmpp/iqtask.h

 /*
  *  Copyright 2011 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef WEBRTC_LIBJINGLE_XMPP_IQTASK_H_
 #define WEBRTC_LIBJINGLE_XMPP_IQTASK_H_
 
+#include <memory>
 #include <string>
 
 #include "webrtc/libjingle/xmpp/xmppengine.h"
 #include "webrtc/libjingle/xmpp/xmpptask.h"
 
 namespace buzz {
 
 class IqTask : public XmppTask {
  public:
   IqTask(XmppTaskParentInterface* parent,
          const std::string& verb, const Jid& to,
          XmlElement* el);
   virtual ~IqTask() {}
 
   const XmlElement* stanza() const { return stanza_.get(); }
 
   sigslot::signal2<IqTask*,
                    const XmlElement*> SignalError;
 
  protected:
   virtual void HandleResult(const XmlElement* element) = 0;
 
  private:
   virtual int ProcessStart();
   virtual bool HandleStanza(const XmlElement* stanza);
   virtual int ProcessResponse();
   virtual int OnTimeout();
 
   Jid to_;
-  rtc::scoped_ptr<XmlElement> stanza_;
+  std::unique_ptr<XmlElement> stanza_;
 };
 
 }  // namespace buzz
 
 #endif  // WEBRTC_LIBJINGLE_XMPP_IQTASK_H_