Index: chromium-70.0.3538.54/build/linux/unbundle/libusb.gn
===================================================================
--- /dev/null
+++ chromium-70.0.3538.54/build/linux/unbundle/libusb.gn
@@ -0,0 +1,24 @@
+# Copyright 2016 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("//build/config/linux/pkg_config.gni")
+import("//build/shim_headers.gni")
+
+pkg_config("system_libusb") {
+  packages = [ "libusb-1.0" ]
+}
+
+shim_headers("libusb_shim") {
+  root_path = "src/libusb"
+  headers = [
+    "libusb.h",
+  ]
+}
+
+source_set("libusb") {
+  deps = [
+    ":libusb_shim",
+  ]
+  public_configs = [ ":system_libusb" ]
+}
Index: chromium-70.0.3538.54/build/linux/unbundle/replace_gn_files.py
===================================================================
--- chromium-70.0.3538.54.orig/build/linux/unbundle/replace_gn_files.py
+++ chromium-70.0.3538.54/build/linux/unbundle/replace_gn_files.py
@@ -27,6 +27,7 @@ REPLACEMENTS = {
   'libevent': 'base/third_party/libevent/BUILD.gn',
   'libjpeg': 'third_party/libjpeg.gni',
   'libpng': 'third_party/libpng/BUILD.gn',
+  'libusb': 'third_party/libusb/BUILD.gn',
   'libvpx': 'third_party/libvpx/BUILD.gn',
   'libwebp': 'third_party/libwebp/BUILD.gn',
   'libxml': 'third_party/libxml/BUILD.gn',