Add HostObserverInterface and decouple HeartbeatSender and ChromotingHost.

remoting/jingle_glue/jingle_thread.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_JINGLE_GLUE_JINGLE_THREAD_H_
 #define REMOTING_JINGLE_GLUE_JINGLE_THREAD_H_
 
 #include "base/message_loop.h"
 #include "base/tracked_objects.h"
 #include "base/synchronization/waitable_event.h"
@@ skipping 41 matching lines @@
   // talk_base::Thread
   MessageLoop* message_loop();
 
   // Returns task pump if the thread is running, otherwise NULL is returned.
   TaskPump* task_pump();
 
  private:
   class JingleMessageLoop;
   class JingleMessagePump;
 
-  friend class HeartbeatSenderTest;
-
   virtual void OnMessage(talk_base::Message* msg);
 
   TaskPump* task_pump_;
   base::WaitableEvent started_event_;
   base::WaitableEvent stopped_event_;
   MessageLoop* message_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(JingleThread);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_JINGLE_GLUE_JINGLE_THREAD_H_