chromeos: Remove dbus::FileDescriptor from LorgnetteManagerClient

chromeos/dbus/fake_lorgnette_manager_client.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 CHROMEOS_DBUS_FAKE_LORGNETTE_MANAGER_CLIENT_H_
 #define CHROMEOS_DBUS_FAKE_LORGNETTE_MANAGER_CLIENT_H_
 
-#include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "chromeos/dbus/lorgnette_manager_client.h"
 
 namespace chromeos {
 
 // Lorgnette LorgnetteManagerClient implementation used on Linux desktop,
 // which does nothing.
 class CHROMEOS_EXPORT FakeLorgnetteManagerClient
     : public LorgnetteManagerClient {
  public:
   FakeLorgnetteManagerClient();
   ~FakeLorgnetteManagerClient() override;
 
   void Init(dbus::Bus* bus) override;
 
   void ListScanners(const ListScannersCallback& callback) override;
-  void ScanImageToFile(
-      std::string device_name,
-      const ScanProperties& properties,
-      const ScanImageToFileCallback& callback,
-      base::File* file) override;
   void ScanImageToString(
       std::string device_name,
       const ScanProperties& properties,
       const ScanImageToStringCallback& callback) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FakeLorgnetteManagerClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_FAKE_LORGNETTE_MANAGER_CLIENT_H_