Merge components/usb_service into device/usb.

components/usb_service/usb_error.h

Index: components/usb_service/usb_error.h
diff --git a/components/usb_service/usb_error.h b/components/usb_service/usb_error.h
deleted file mode 100644
index b718d676b26af4cb7fbc406c03d2e463c951803f..0000000000000000000000000000000000000000
--- a/components/usb_service/usb_error.h
+++ /dev/null
@@ -1,18 +0,0 @@
-// 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 COMPONENTS_USB_SERVICE_USB_ERROR_H_
-#define COMPONENTS_USB_SERVICE_USB_ERROR_H_
-
-#include <string>
-
-namespace usb_service {
-
-// A number of libusb functions which return a member of enum libusb_error
-// return an int instead so for convenience this function takes an int.
-std::string ConvertErrorToString(int errcode);
-
-}  // namespace usb_service;
-
-#endif  // COMPONENTS_USB_SERVICE_USB_ERROR_H_