Pull buildtools to get GN r282653

device/media_transfer_protocol/BUILD.gn

 # 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.
 
 import("//third_party/protobuf/proto_library.gni")
 
 # GYP version: device/media_transfer_protocol/media_transfer_protocol.gyp:mtp_file_entry_proto
 proto_library("mtp_file_entry_proto") {
   sources = [ "//third_party/cros_system_api/dbus/mtp_file_entry.proto" ]
-  proto_in_dir = "//third_party/cros_system_api/dbus"
   proto_out_dir = "device/media_transfer_protocol"
 }
 
 # GYP version: device/media_transfer_protocol/media_transfer_protocol.gyp:mtp_storage_info_proto
 proto_library("mtp_storage_info_proto") {
   sources = [ "//third_party/cros_system_api/dbus/mtp_storage_info.proto" ]
-  proto_in_dir = "//third_party/cros_system_api/dbus"
   proto_out_dir = "device/media_transfer_protocol"
 }
 
 # GYP version: device/media_transfer_protocol:media_transfer_protocol.gyp:media_transfer_protocol
 static_library("media_transfer_protocol") {
   sources = [
     "media_transfer_protocol_daemon_client.cc",
     "media_transfer_protocol_daemon_client.h",
     "media_transfer_protocol_manager.cc",
     "media_transfer_protocol_manager.h",
   ]
 
   configs += [ "//build/config/linux:dbus" ]
 
   deps = [
     ":mtp_file_entry_proto",
     ":mtp_storage_info_proto",
   ]
   forward_dependent_configs_from = deps
 }