[Chromoting] Use HostExperimentSessionPlugin in host

remoting/host/host_experiment_servant.cc

 // 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.
 
-#include "remoting/host/host_experiment_session_plugin.h"
+#include "remoting/host/host_experiment_servant.h"
 
 #include "remoting/base/constants.h"
 #include "remoting/host/host_attributes.h"
 
 namespace remoting {
 
 using buzz::QName;
 using buzz::XmlElement;
 
-std::unique_ptr<XmlElement> HostExperimentSessionPlugin::GetNextMessage() {
+std::unique_ptr<XmlElement> HostExperimentServant::GetNextMessage() {
   if (attributes_sent_) {
     return nullptr;
   }
   attributes_sent_ = true;
   std::unique_ptr<XmlElement> attributes(
       new XmlElement(QName(kChromotingXmlNamespace, "host-attributes")));
   attributes->SetBodyText(GetHostAttributes());
   return attributes;
 }
 
-void HostExperimentSessionPlugin::OnIncomingMessage(
-    const XmlElement& attachments) {
+void HostExperimentServant::OnIncomingMessage(const XmlElement& attachments) {
   if (configuration_received_) {
     return;
   }
 
   const XmlElement* configuration = attachments.FirstNamed(
       QName(kChromotingXmlNamespace, "host-configuration"));
   if (!configuration) {
     return;
   }
 
   configuration_received_ = true;
   configuration_ = configuration->BodyText();
 }
 
-bool HostExperimentSessionPlugin::configuration_received() const {
+bool HostExperimentServant::configuration_received() const {
   return configuration_received_;
 }
 
-const std::string& HostExperimentSessionPlugin::configuration() const {
+const std::string& HostExperimentServant::configuration() const {
   return configuration_;
 }
 
 }  // namespace remoting