Adding ThreadChecker validation to d'tors for protocol classes

remoting/protocol/webrtc_video_stream.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_video_stream.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 33 matching lines @@
 
 struct WebrtcVideoStream::EncodedFrameWithStats {
   std::unique_ptr<WebrtcVideoEncoder::EncodedFrame> frame;
   std::unique_ptr<FrameStats> stats;
 };
 
 WebrtcVideoStream::WebrtcVideoStream()
     : video_stats_dispatcher_(kStreamLabel), weak_factory_(this) {}
 
 WebrtcVideoStream::~WebrtcVideoStream() {
+  DCHECK(thread_checker_.CalledOnValidThread());
   if (stream_) {
     for (const auto& track : stream_->GetVideoTracks()) {
       stream_->RemoveTrack(track.get());
     }
     peer_connection_->RemoveStream(stream_.get());
   }
   encode_task_runner_->DeleteSoon(FROM_HERE, encoder_.release());
 }
 
 void WebrtcVideoStream::Start(
@@ skipping 210 matching lines @@
     encoder_ = WebrtcVideoEncoderVpx::CreateForVP8();
   } else if (codec_type == webrtc::kVideoCodecVP9) {
     encoder_ = WebrtcVideoEncoderVpx::CreateForVP9();
   } else {
     LOG(FATAL) << "Unknown codec type: " << codec_type;
   }
 }
 
 }  // namespace protocol
 }  // namespace remoting