Added HostConfig class. Changed SimpleHost to use it.

remoting/host/heartbeat_sender.h

 // Copyright (c) 2010 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_HEARTBEAT_SENDER_H_
 #define REMOTING_HOST_HEARTBEAT_SENDER_H_
 
 #include <string>
 
 #include "base/scoped_ptr.h"
 #include "base/ref_counted.h"
 #include "remoting/jingle_glue/iq_request.h"
 
 namespace remoting {
 
 class IqRequest;
 class JingleClient;
+class HostConfig;
 
 // HeartbeatSender periodically sends hertbeats to the chromoting bot.
 // TODO(sergeyu): Write unittest for this class.
 class HeartbeatSender : public base::RefCountedThreadSafe<HeartbeatSender> {
  public:
   HeartbeatSender();
 
   // Starts heart-beating for |jingle_client|.
-  void Start(JingleClient* jingle_client, const std::string& host_id);
+  void Start(HostConfig* config, JingleClient* jingle_client);
 
  private:
   void DoStart();
   void DoSendStanza();
 
   void ProcessResponse(const buzz::XmlElement* response);
 
   bool started_;
+  scoped_refptr<HostConfig> config_;
   JingleClient* jingle_client_;
-  std::string host_id_;
   scoped_ptr<IqRequest> request_;
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_HEARTBEAT_SENDER_H_