Revert of Remove Client= from device/serial/data_stream.mojom.

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 "third_party/mojo/src/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:
   SerialConnection(scoped_refptr<SerialIoHandler> io_handler,
                    mojo::InterfaceRequest<serial::DataSink> sink,
-                   mojo::InterfacePtr<serial::DataSinkClient> sink_client,
-                   mojo::InterfaceRequest<serial::DataSource> source,
-                   mojo::InterfacePtr<serial::DataSourceClient> source_client);
+                   mojo::InterfaceRequest<serial::DataSource> source);
   ~SerialConnection() override;
 
   // mojo::InterfaceImpl<serial::Connection> overrides.
   void GetInfo(
       const mojo::Callback<void(serial::ConnectionInfoPtr)>& callback) override;
   void SetOptions(serial::ConnectionOptionsPtr options,
                   const mojo::Callback<void(bool)>& callback) override;
   void SetControlSignals(serial::HostControlSignalsPtr signals,
                          const mojo::Callback<void(bool)>& callback) override;
   void GetControlSignals(
       const mojo::Callback<void(serial::DeviceControlSignalsPtr)>& callback)
       override;
   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_