Adding ThreadChecker validation to d'tors for host classes

remoting/host/security_key/security_key_socket.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_socket.h"
 
 #include <utility>
 
 #include "base/callback_helpers.h"
 #include "base/macros.h"
@@ skipping 17 matching lines @@
 
 SecurityKeySocket::SecurityKeySocket(std::unique_ptr<net::StreamSocket> socket,
                                      base::TimeDelta timeout,
                                      const base::Closure& timeout_callback)
     : socket_(std::move(socket)),
       read_buffer_(new net::IOBufferWithSize(kRequestReadBufferLength)) {
   timer_.reset(new base::Timer(false, false));
   timer_->Start(FROM_HERE, timeout, timeout_callback);
 }
 
-SecurityKeySocket::~SecurityKeySocket() {}
+SecurityKeySocket::~SecurityKeySocket() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+}
 
 bool SecurityKeySocket::GetAndClearRequestData(std::string* data_out) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(!waiting_for_request_);
 
   if (!IsRequestComplete() || IsRequestTooLarge()) {
     return false;
   }
   // The request size is not part of the data; don't send it.
   data_out->assign(request_data_.begin() + kRequestSizeBytes,
@@ skipping 145 matching lines @@
   return response_len;
 }
 
 void SecurityKeySocket::ResetTimer() {
   if (timer_->IsRunning()) {
     timer_->Reset();
   }
 }
 
 }  // namespace remoting