Merge components/usb_service into device/usb.

device/usb/usb_error.cc

 // 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.
 
-#include "components/usb_service/usb_error.h"
+#include "device/usb/usb_error.h"
 
 #include "third_party/libusb/src/libusb/libusb.h"
 
-namespace usb_service {
+namespace device {
 
-std::string ConvertErrorToString(int errcode) {
+std::string ConvertPlatformUsbErrorToString(int errcode) {
   return libusb_strerror(static_cast<libusb_error>(errcode));
 }
 
-}  // namespace usb_service;
+}  // namespace device