Adding ThreadChecker validation to d'tors for protocol classes

remoting/protocol/ice_transport_channel.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/ice_transport_channel.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/callback.h"
@@ skipping 42 matching lines @@
       ice_username_fragment_(
           rtc::CreateRandomString(kIceUfragLength)),
       connect_attempts_left_(
           transport_context->network_settings().ice_reconnect_attempts),
       weak_factory_(this) {
   DCHECK(!ice_username_fragment_.empty());
 }
 
 IceTransportChannel::~IceTransportChannel() {
   DCHECK(delegate_);
+  DCHECK(thread_checker_.CalledOnValidThread());
 
   delegate_->OnChannelDeleted(this);
 
   auto task_runner = base::ThreadTaskRunnerHandle::Get();
   if (channel_)
     task_runner->DeleteSoon(FROM_HERE, channel_.release());
   if (port_allocator_)
     task_runner->DeleteSoon(FROM_HERE, port_allocator_.release());
 }
 
@@ skipping 197 matching lines @@
 
   // Restart ICE by resetting ICE password.
   std::string ice_password = rtc::CreateRandomString(cricket::ICE_PWD_LENGTH);
   delegate_->OnChannelIceCredentials(this, ice_username_fragment_,
                                      ice_password);
   channel_->SetIceCredentials(ice_username_fragment_, ice_password);
 }
 
 }  // namespace protocol
 }  // namespace remoting