Add HostObserverInterface and decouple HeartbeatSender and ChromotingHost.

remoting/host/simple_host_process.cc

 // 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.
 //
 // This is an application of a minimal host process in a Chromoting
 // system. It serves the purpose of gluing different pieces together
 // to make a functional host process for testing.
 //
 // It peforms the following functionality:
 // 1. Connect to the GTalk network and register the machine as a host.
@@ skipping 18 matching lines @@
 #include "base/threading/thread.h"
 #include "crypto/nss_util.h"
 #include "media/base/media.h"
 #include "remoting/base/tracer.h"
 #include "remoting/host/capturer_fake.h"
 #include "remoting/host/chromoting_host.h"
 #include "remoting/host/chromoting_host_context.h"
 #include "remoting/host/curtain.h"
 #include "remoting/host/desktop_environment.h"
 #include "remoting/host/event_executor.h"
+#include "remoting/host/heartbeat_sender.h"
 #include "remoting/host/json_host_config.h"
 #include "remoting/proto/video.pb.h"
 
 #if defined(TOOLKIT_USES_GTK)
 #include "ui/gfx/gtk_util.h"
 #endif
 
 using remoting::ChromotingHost;
 using remoting::DesktopEnvironment;
 using remoting::protocol::CandidateSessionConfig;
@@ skipping 116 matching lines @@
     }
     config->mutable_video_configs()->push_back(ChannelConfig(
         transport, remoting::protocol::kDefaultStreamVersion, codec));
     host->set_protocol_config(config.release());
   }
 
 #if defined(OS_MACOSX)
   mock_cr_app::RegisterMockCrApp();
 #endif  // OS_MACOSX
 
+  // Initialize HeartbeatSender.
+  scoped_refptr<remoting::HeartbeatSender> heartbeat_sender =
+      new remoting::HeartbeatSender(context.network_message_loop(), config);
+  if (!heartbeat_sender->Init())
+    return 1;
+  host->AddStatusObserver(heartbeat_sender);
+
   // Let the chromoting host run until the shutdown task is executed.
   host->Start(NewRunnableFunction(&ShutdownTask, &message_loop));
   message_loop.MessageLoop::Run();
 
   // And then stop the chromoting context.
   context.Stop();
   file_io_thread.Stop();
   return 0;
 }