Work on GN build of Chrome.

components/usb_service/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.
 
 component("usb_service") {
   sources = [
     "usb_context.cc",
     "usb_context.h",
     "usb_device_impl.cc",
     "usb_device_impl.h",
     "usb_device.h",
+    "usb_device_filter.cc",
+    "usb_device_filter.h",
     "usb_device_handle_impl.cc",
     "usb_device_handle_impl.h",
     "usb_device_handle.h",
     "usb_error.cc",
     "usb_error.h",
     "usb_interface.h",
     "usb_interface_impl.cc",
     "usb_interface_impl.h",
     "usb_service.h",
     "usb_service_impl.cc",
   ]
 
   defines = [ "USB_SERVICE_IMPLEMENTATION" ]
 
   deps = [
     "//base",
     "//base/third_party/dynamic_annotations",
     "//content/public/browser",
     "//net",
     "//third_party/libusb",
   ]
 
   if (is_linux) {
     configs += [ "//build/config/linux:udev" ]
   }
 }