Adding ThreadChecker validation to d'tors for host classes

remoting/host/security_key/security_key_auth_handler_posix.cc

 // Copyright 2016 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/security_key/security_key_auth_handler.h"
 
 #include <unistd.h>
 
 #include <cstdint>
 #include <map>
@@ skipping 134 matching lines @@
 }
 
 SecurityKeyAuthHandlerPosix::SecurityKeyAuthHandlerPosix(
     scoped_refptr<base::SingleThreadTaskRunner> file_task_runner)
     : file_task_runner_(file_task_runner),
       request_timeout_(
           base::TimeDelta::FromSeconds(kDefaultRequestTimeoutSeconds)),
       weak_factory_(this) {}
 
 SecurityKeyAuthHandlerPosix::~SecurityKeyAuthHandlerPosix() {
+  DCHECK(thread_checker_.CalledOnValidThread());
   if (file_task_runner_) {
     // Attempt to clean up the socket before being destroyed.
     file_task_runner_->PostTask(
         FROM_HERE, base::Bind(base::IgnoreResult(&base::DeleteFile),
                               g_security_key_socket_name.Get(),
                               /*recursive=*/false));
   }
 }
 
 void SecurityKeyAuthHandlerPosix::CreateSecurityKeyConnection() {
@@ skipping 138 matching lines @@
 
 void SecurityKeyAuthHandlerPosix::RequestTimedOut(int connection_id) {
   HOST_LOG << "SecurityKey request timed out for socket: " << connection_id;
   ActiveSockets::const_iterator iter = active_sockets_.find(connection_id);
   if (iter != active_sockets_.end()) {
     SendErrorAndCloseActiveSocket(iter);
   }
 }
 
 }  // namespace remoting