Update xmllite reference to new source location (2)

remoting/host/host_experiment_session_plugin.h

 // Copyright 2016 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_HOST_HOST_EXPERIMENT_SESSION_PLUGIN_H_
 #define REMOTING_HOST_HOST_EXPERIMENT_SESSION_PLUGIN_H_
 
 #include <memory>
 #include <string>
 
 #include "remoting/protocol/session_plugin.h"
-#include "third_party/webrtc/libjingle/xmllite/xmlelement.h"
+#include "third_party/libjingle_xmpp/xmllite/xmlelement.h"
 
 namespace remoting {
 
 // A SessionPlugin implementation to send host attributes to client, and
 // receives experiment settings.
 class HostExperimentSessionPlugin : public protocol::SessionPlugin {
  public:
   using SessionPlugin::SessionPlugin;
 
   // protocol::SessionPlug implementation.
   std::unique_ptr<buzz::XmlElement> GetNextMessage() override;
 
   void OnIncomingMessage(const buzz::XmlElement& attachments) override;
 
   // Whether we have received configuration from client.
   bool configuration_received() const;
 
   // The configuration sent from client, may be empty.
   const std::string& configuration() const;
 
  private:
   bool attributes_sent_ = false;
   bool configuration_received_ = false;
   std::string configuration_;
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_HOST_EXPERIMENT_SESSION_PLUGIN_H_