Add HostObserverInterface and decouple HeartbeatSender and ChromotingHost.

remoting/jingle_glue/jingle_client.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_JINGLE_CLIENT_H_
 #define REMOTING_JINGLE_GLUE_JINGLE_CLIENT_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
@@ skipping 159 matching lines @@
   IqRequest* CreateIqRequest();
 
   // The session manager used by this client. Must be called from the
   // jingle thread only. Returns NULL if the client is not active.
   cricket::SessionManager* session_manager();
 
   // Message loop used by this object to execute tasks.
   MessageLoop* message_loop();
 
  private:
-  friend class HeartbeatSenderTest;
   friend class JingleClientTest;
 
   void DoInitialize();
   void DoStartSession();
   void DoClose();
 
   // Updates current state of the connection. Must be called only in
   // the jingle thread.
   void UpdateState(State new_state);
 
@@ skipping 45 matching lines @@
   scoped_ptr<cricket::SessionManager> session_manager_;
 
   scoped_ptr<JingleInfoRequest> jingle_info_request_;
 
   DISALLOW_COPY_AND_ASSIGN(JingleClient);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_JINGLE_GLUE_JINGLE_CLIENT_H_