Adding ThreadChecker statement to d'tor for remoting/base classes

remoting/base/buffered_socket_writer.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/base/buffered_socket_writer.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/memory/ptr_util.h"
 #include "net/base/io_buffer.h"
@@ skipping 28 matching lines @@
 std::unique_ptr<BufferedSocketWriter> BufferedSocketWriter::CreateForSocket(
     net::Socket* socket,
     const WriteFailedCallback& write_failed_callback) {
   std::unique_ptr<BufferedSocketWriter> result(new BufferedSocketWriter());
   result->Start(base::Bind(&WriteNetSocket, socket), write_failed_callback);
   return result;
 }
 
 BufferedSocketWriter::BufferedSocketWriter() : weak_factory_(this) {}
 
-BufferedSocketWriter::~BufferedSocketWriter() {}
+BufferedSocketWriter::~BufferedSocketWriter() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+}
 
 void BufferedSocketWriter::Start(
     const WriteCallback& write_callback,
     const WriteFailedCallback& write_failed_callback) {
   write_callback_ = write_callback;
   write_failed_callback_ = write_failed_callback;
   DoWrite();
 }
 
 void BufferedSocketWriter::Write(
@@ skipping 57 matching lines @@
   DCHECK(write_pending_);
   write_pending_ = false;
 
   base::WeakPtr<BufferedSocketWriter> self = weak_factory_.GetWeakPtr();
   HandleWriteResult(result);
   if (self)
     DoWrite();
 }
 
 }  // namespace remoting