Add webusb notification UI code

chrome/browser/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("//build/config/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//third_party/protobuf/proto_library.gni")
 
@@ skipping 617 matching lines @@
     # Mobile.
     sources +=
         rebase_path(gypi_values.chrome_browser_mobile_sources, ".", "//chrome")
   } else {
     # Non-mobile.
     sources += rebase_path(gypi_values.chrome_browser_non_mobile_sources,
                            ".",
                            "//chrome")
     deps += [
       "//components/feedback",
+      "//components/webusb",
       "//device/core",
       "//device/devices_app/public/cpp",
       "//device/devices_app/public/cpp:factory",
       "//device/usb",
     ]
   }
 
   if (!is_official_build) {
     sources += [
       "search/local_files_ntp_source.cc",
@@ skipping 570 matching lines @@
         rebase_path(gypi_values.chrome_browser_rlz_sources, ".", "//chrome")
     deps = [
       "//components/google/core/browser",
       "//components/omnibox/browser",
       "//components/rlz",
       "//components/search_engines",
       "//rlz:rlz_lib",
     ]
   }
 }