Implement break signal for serial api.

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"
@@ skipping 342 matching lines @@
   control_signals->dsr = signals->dsr;
   return true;
 }
 
 bool SerialConnection::SetControlSignals(
     const core_api::serial::HostControlSignals& control_signals) {
   return io_handler_->SetControlSignals(
       *device::serial::HostControlSignals::From(control_signals));
 }
 
+bool SerialConnection::SetBreak() {
+  return io_handler_->SetBreak();
+}
+
+bool SerialConnection::ClearBreak() {
+  return io_handler_->ClearBreak();
+}
+
 void SerialConnection::OnReceiveTimeout() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   io_handler_->CancelRead(device::serial::RECEIVE_ERROR_TIMEOUT);
 }
 
 void SerialConnection::OnSendTimeout() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   io_handler_->CancelWrite(device::serial::SEND_ERROR_TIMEOUT);
 }
 
@@ skipping 71 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.Pass();
 }
 
 }  // namespace mojo