Adding ThreadChecker validation to d'tors for protocol classes

remoting/protocol/webrtc_connection_to_client.cc

 // Copyright 2015 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/protocol/webrtc_connection_to_client.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 36 matching lines @@
       session_(std::move(session)),
       video_encode_task_runner_(video_encode_task_runner),
       audio_task_runner_(audio_task_runner),
       control_dispatcher_(new HostControlDispatcher()),
       event_dispatcher_(new HostEventDispatcher()),
       weak_factory_(this) {
   session_->SetEventHandler(this);
   session_->SetTransport(transport_.get());
 }
 
-WebrtcConnectionToClient::~WebrtcConnectionToClient() {}
+WebrtcConnectionToClient::~WebrtcConnectionToClient() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+}
 
 void WebrtcConnectionToClient::SetEventHandler(
     ConnectionToClient::EventHandler* event_handler) {
   DCHECK(thread_checker_.CalledOnValidThread());
   event_handler_ = event_handler;
 }
 
 protocol::Session* WebrtcConnectionToClient::session() {
   DCHECK(thread_checker_.CalledOnValidThread());
   return session_.get();
@@ skipping 144 matching lines @@
     ChannelDispatcherBase* channel_dispatcher) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   LOG(ERROR) << "Channel " << channel_dispatcher->channel_name()
              << " was closed unexpectedly.";
   Disconnect(INCOMPATIBLE_PROTOCOL);
 }
 
 }  // namespace protocol
 }  // namespace remoting