Adding ThreadChecker validation to d'tors for client classes

remoting/client/client_telemetry_logger.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/client/client_telemetry_logger.h"
 
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/rand_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 18 matching lines @@
   const std::string host_version;
   const ChromotingEvent::Os host_os;
   const std::string host_os_version;
 };
 
 ClientTelemetryLogger::ClientTelemetryLogger(
     ChromotingEventLogWriter* log_writer,
     ChromotingEvent::Mode mode)
     : mode_(mode), log_writer_(log_writer) {}
 
-ClientTelemetryLogger::~ClientTelemetryLogger() {}
+ClientTelemetryLogger::~ClientTelemetryLogger() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+}
 
 void ClientTelemetryLogger::SetHostInfo(const std::string& host_version,
                                         ChromotingEvent::Os host_os,
                                         const std::string& host_os_version) {
   host_info_.reset(new HostInfo{host_version, host_os, host_os_version});
 }
 
 void ClientTelemetryLogger::LogSessionStateChange(
     ChromotingEvent::SessionState state,
     ChromotingEvent::ConnectionError error) {
@@ skipping 209 matching lines @@
   return event;
 }
 
 ChromotingEvent ClientTelemetryLogger::MakeSessionIdNewEvent() {
   ChromotingEvent event(ChromotingEvent::Type::SESSION_ID_NEW);
   FillEventContext(&event);
   return event;
 }
 
 }  // namespace remoting