[remoting] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

remoting/host/heartbeat_sender.h

 // Copyright (c) 2012 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/callback.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/single_thread_task_runner.h"
 #include "base/threading/thread_checker.h"
 #include "base/timer/timer.h"
 #include "remoting/base/rsa_key_pair.h"
 #include "remoting/signaling/signal_strategy.h"
 
 namespace base {
-class MessageLoopProxy;
+class SingleThreadTaskRunner;

[Sergey Ulanov, 2015/04/28 17:03:22]

SingleThreadTaskRunner is not used in this file, so you can remove this and also
don't need to include single_thread_task_runner.h . You certainly don't need
both forward-declare it here and include single_thread_task_runner.h at the same
time

[anujsharma, 2015/05/04 12:38:21]

Done.

 class TimeDelta;
 }  // namespace base
 
 namespace buzz {
 class XmlElement;
 }  // namespace buzz
 
 namespace remoting {
 
 class RsaKeyPair;
@@ skipping 141 matching lines @@
   base::OneShotTimer<HeartbeatSender> host_offline_reason_timeout_timer_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(HeartbeatSender);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_HEARTBEAT_SENDER_H_