Implement the host side of serial connection I/O on data pipe.

device/serial/serial_connection.h

 // 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.
 
 #ifndef DEVICE_SERIAL_SERIAL_CONNECTION_H_
 #define DEVICE_SERIAL_SERIAL_CONNECTION_H_
 
 #include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
 #include "device/serial/serial.mojom.h"
 #include "mojo/public/cpp/bindings/interface_impl.h"
 
 namespace device {
 
+class DataSinkReceiver;
+class DataSourceSender;
+class ReadOnlyBuffer;
 class SerialIoHandler;
+class WritableBuffer;
 
 class SerialConnection : public mojo::InterfaceImpl<serial::Connection> {
  public:
-  explicit SerialConnection(scoped_refptr<SerialIoHandler> io_handler);
+  SerialConnection(scoped_refptr<SerialIoHandler> io_handler,
+                   mojo::InterfaceRequest<serial::DataSink> sink,
+                   mojo::InterfaceRequest<serial::DataSource> source);
   virtual ~SerialConnection();
 
   // mojo::InterfaceImpl<serial::Connection> overrides.
   virtual void GetInfo(
       const mojo::Callback<void(serial::ConnectionInfoPtr)>& callback) OVERRIDE;
   virtual void SetOptions(serial::ConnectionOptionsPtr options,
                           const mojo::Callback<void(bool)>& callback) OVERRIDE;
   virtual void SetControlSignals(
       serial::HostControlSignalsPtr signals,
       const mojo::Callback<void(bool)>& callback) OVERRIDE;
   virtual void GetControlSignals(const mojo::Callback<
       void(serial::DeviceControlSignalsPtr)>& callback) OVERRIDE;
   virtual void Flush(const mojo::Callback<void(bool)>& callback) OVERRIDE;
 
  private:
+  void OnSendPipeReady(scoped_ptr<ReadOnlyBuffer> buffer);
+  void OnSendCancelled(int32_t error);
+  void OnReceivePipeReady(scoped_ptr<WritableBuffer> buffer);
+
   scoped_refptr<SerialIoHandler> io_handler_;
+  scoped_refptr<DataSinkReceiver> receiver_;
+  scoped_refptr<DataSourceSender> sender_;
 
   DISALLOW_COPY_AND_ASSIGN(SerialConnection);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_SERIAL_SERIAL_CONNECTION_H_