Adding ThreadChecker validation to d'tors for host classes

remoting/host/security_key/security_key_ipc_server_impl.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_ipc_server_impl.h"
 
 #include <cstdint>
 #include <memory>
 #include <string>
 
@@ skipping 45 matching lines @@
       connect_callback_(connect_callback),
       done_callback_(done_callback),
       message_callback_(message_callback),
       weak_factory_(this) {
   DCHECK_GT(connection_id_, 0);
   DCHECK(!done_callback_.is_null());
   DCHECK(!message_callback_.is_null());
 }
 
 SecurityKeyIpcServerImpl::~SecurityKeyIpcServerImpl() {
+  DCHECK(thread_checker_.CalledOnValidThread());
   CloseChannel();
 }
 
 bool SecurityKeyIpcServerImpl::CreateChannel(
     const mojo::edk::NamedPlatformHandle& channel_handle,
     base::TimeDelta request_timeout) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(!ipc_channel_);
   security_key_request_timeout_ = request_timeout;
 
@@ skipping 137 matching lines @@
     connection_close_pending_ = false;
   }
   // Close the underlying mojo connection.
   if (!mojo_peer_token_.empty()) {
     mojo::edk::ClosePeerConnection(mojo_peer_token_);
     mojo_peer_token_.clear();
   }
 }
 
 }  // namespace remoting