Remove use of deprecated MessageLoop methods in extensions.

extensions/browser/api/serial/serial_connection.cc

 // Copyright 2014 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 "extensions/browser/api/serial/serial_connection.h"
 
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
+#include "base/location.h"
 #include "base/memory/ptr_util.h"
-#include "base/message_loop/message_loop.h"
+#include "base/single_thread_task_runner.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "device/serial/buffer.h"
 #include "extensions/browser/api/api_resource_manager.h"
 #include "extensions/common/api/serial.h"
 
 namespace extensions {
 
 namespace {
 
 const int kDefaultBufferSize = 4096;
 
@@ skipping 333 matching lines @@
   DCHECK(!send_complete_.is_null());
   SendCompleteCallback callback = send_complete_;
   send_complete_.Reset();
   send_timeout_task_.reset();
   callback.Run(bytes_sent, ConvertSendErrorFromMojo(error));
 }
 
 SerialConnection::TimeoutTask::TimeoutTask(const base::Closure& closure,
                                            const base::TimeDelta& delay)
     : closure_(closure), delay_(delay), weak_factory_(this) {
-  base::MessageLoop::current()->PostDelayedTask(
-      FROM_HERE,
-      base::Bind(&TimeoutTask::Run, weak_factory_.GetWeakPtr()),
+  base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
+      FROM_HERE, base::Bind(&TimeoutTask::Run, weak_factory_.GetWeakPtr()),
       delay_);
 }
 
 SerialConnection::TimeoutTask::~TimeoutTask() {
 }
 
 void SerialConnection::TimeoutTask::Run() const {
   closure_.Run();
 }
 
@@ skipping 32 matching lines @@
   output->parity_bit = extensions::ConvertParityBitToMojo(input.parity_bit);
   output->stop_bits = extensions::ConvertStopBitsToMojo(input.stop_bits);
   if (input.cts_flow_control.get()) {
     output->has_cts_flow_control = true;
     output->cts_flow_control = *input.cts_flow_control;
   }
   return output;
 }
 
 }  // namespace mojo