Convert SerialIoHandler to use buffer interfaces for I/O API methods.

device/serial/test_serial_io_handler.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 "device/serial/test_serial_io_handler.h"
 
 #include "base/bind.h"
 #include "device/serial/serial.mojom.h"
 
 namespace device {
@@ skipping 35 matching lines @@
 void TestSerialIoHandler::ReadImpl() {
 }
 
 void TestSerialIoHandler::CancelReadImpl() {
   QueueReadCompleted(0, read_cancel_reason());
 }
 
 void TestSerialIoHandler::WriteImpl() {
   DCHECK(pending_read_buffer());
   DCHECK_LE(pending_write_buffer_len(), pending_read_buffer_len());
-  memcpy(pending_read_buffer()->data(),
-         pending_write_buffer()->data(),
+  memcpy(pending_read_buffer(),
+         pending_write_buffer(),
          pending_write_buffer_len());
   QueueReadCompleted(pending_write_buffer_len(), serial::RECEIVE_ERROR_NONE);
   QueueWriteCompleted(pending_write_buffer_len(), serial::SEND_ERROR_NONE);
 }
 
 void TestSerialIoHandler::CancelWriteImpl() {
   QueueWriteCompleted(0, write_cancel_reason());
 }
 
 serial::DeviceControlSignalsPtr TestSerialIoHandler::GetControlSignals() const {
@@ skipping 19 matching lines @@
     dtr_ = signals.dtr;
   if (signals.has_rts)
     rts_ = signals.rts;
   return true;
 }
 
 TestSerialIoHandler::~TestSerialIoHandler() {
 }
 
 }  // namespace device