Revert of Deletes mojo::Callback

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 <stdint.h>
 
 #include <memory>
@@ skipping 14 matching lines @@
 class SerialConnection : public serial::Connection {
  public:
   SerialConnection(scoped_refptr<SerialIoHandler> io_handler,
                    mojo::InterfaceRequest<serial::DataSink> sink,
                    mojo::InterfaceRequest<serial::DataSource> source,
                    mojo::InterfacePtr<serial::DataSourceClient> source_client,
                    mojo::InterfaceRequest<serial::Connection> request);
   ~SerialConnection() override;
 
   // serial::Connection overrides.
-  void GetInfo(const GetInfoCallback& callback) override;
+  void GetInfo(
+      const mojo::Callback<void(serial::ConnectionInfoPtr)>& callback) override;
   void SetOptions(serial::ConnectionOptionsPtr options,
-                  const SetOptionsCallback& callback) override;
+                  const mojo::Callback<void(bool)>& callback) override;
   void SetControlSignals(serial::HostControlSignalsPtr signals,
-                         const SetControlSignalsCallback& callback) override;
-  void GetControlSignals(const GetControlSignalsCallback& callback) override;
-  void Flush(const FlushCallback& callback) override;
+                         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(std::unique_ptr<ReadOnlyBuffer> buffer);
   void OnSendCancelled(int32_t error);
   void OnReceivePipeReady(std::unique_ptr<WritableBuffer> buffer);
 
   scoped_refptr<SerialIoHandler> io_handler_;
   scoped_refptr<DataSinkReceiver> receiver_;
   scoped_refptr<DataSourceSender> sender_;
 
   mojo::StrongBinding<serial::Connection> binding_;
 
   DISALLOW_COPY_AND_ASSIGN(SerialConnection);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_SERIAL_SERIAL_CONNECTION_H_