Deprecate NonThreadSafe in remoting in favor of SequenceChecker.

remoting/host/native_messaging/pipe_messaging_channel.cc

 // Copyright 2013 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/host/native_messaging/pipe_messaging_channel.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 36 matching lines @@
 
 PipeMessagingChannel::PipeMessagingChannel(base::File input, base::File output)
     : native_messaging_reader_(DuplicatePlatformFile(std::move(input))),
       native_messaging_writer_(
           new NativeMessagingWriter(DuplicatePlatformFile(std::move(output)))),
       event_handler_(nullptr),
       weak_factory_(this) {
   weak_ptr_ = weak_factory_.GetWeakPtr();
 }
 
-PipeMessagingChannel::~PipeMessagingChannel() {}
+PipeMessagingChannel::~PipeMessagingChannel() {
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
+}
 
 void PipeMessagingChannel::Start(EventHandler* event_handler) {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   DCHECK(!event_handler_);
 
   event_handler_ = event_handler;
   DCHECK(event_handler_);
 
   native_messaging_reader_.Start(
       base::Bind(&PipeMessagingChannel::ProcessMessage, weak_ptr_),
       base::Bind(&PipeMessagingChannel::Shutdown, weak_ptr_));
 }
 
 void PipeMessagingChannel::ProcessMessage(
     std::unique_ptr<base::Value> message) {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 
   if (event_handler_)
     event_handler_->OnMessage(std::move(message));
 }
 
 void PipeMessagingChannel::SendMessage(std::unique_ptr<base::Value> message) {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 
   bool success = message && native_messaging_writer_;
   if (success)
     success = native_messaging_writer_->WriteMessage(*message);
 
   if (!success) {
     // Close the write pipe so no more responses will be sent.
     native_messaging_writer_.reset();
     Shutdown();
   }
 }
 
 void PipeMessagingChannel::Shutdown() {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 
   if (event_handler_) {
     // Set |event_handler_| to nullptr to indicate the object is in a shutdown
     // cycle. Since event_handler->OnDisconnect() will destroy the current
     // object, |event_handler_| will become a dangling pointer after
     // OnDisconnect() returns. Therefore, we set |event_handler_| to nullptr
     // beforehand.
     EventHandler* handler = event_handler_;
     event_handler_ = nullptr;
     handler->OnDisconnect();
   }
 }
 
 }  // namespace remoting