Adding ThreadChecker validation to d'tors for host classes

remoting/host/heartbeat_sender.cc

 // 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.
 
 #include "remoting/host/heartbeat_sender.h"
 
 #include <math.h>
 #include <stdint.h>
 
 #include "base/bind.h"
@@ skipping 67 matching lines @@
   DCHECK(host_key_pair_.get());
   DCHECK(thread_checker_.CalledOnValidThread());
 
   signal_strategy_->AddListener(this);
 
   // Start heartbeats if the |signal_strategy_| is already connected.
   OnSignalStrategyStateChange(signal_strategy_->GetState());
 }
 
 HeartbeatSender::~HeartbeatSender() {
+  DCHECK(thread_checker_.CalledOnValidThread());
   signal_strategy_->RemoveListener(this);
 }
 
 void HeartbeatSender::OnSignalStrategyStateChange(SignalStrategy::State state) {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (state == SignalStrategy::CONNECTED) {
     iq_sender_.reset(new IqSender(signal_strategy_));
     SendStanza();
     timer_.Start(FROM_HERE, base::TimeDelta::FromMilliseconds(interval_ms_),
                  this, &HeartbeatSender::SendStanza);
@@ skipping 253 matching lines @@
 
   std::string message = signal_strategy_->GetLocalAddress().jid() + ' ' +
                         base::IntToString(sequence_id_);
   std::string signature(host_key_pair_->SignMessage(message));
   signature_tag->AddText(signature);
 
   return signature_tag;
 }
 
 }  // namespace remoting