gn build: check use_udev before depending on udev

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 472 matching lines @@
               ".",
               "//chrome")
     }
   }
 
   if (enable_hotwording) {
     defines += [ "ENABLE_HOTWORDING" ]
   }
 
   if (is_linux) {
-    deps += [
-      "//device/media_transfer_protocol",
-      "//device/udev_linux",
-    ]
+    deps += [ "//device/media_transfer_protocol" ]
   }
+
+  if (use_udev) {
+    deps += [ "//device/udev_linux" ]
+  }
+
   if (is_linux && !is_chromeos) {
     deps += [ "//third_party/speech-dispatcher" ]
   }
 
   if (is_chromeos) {
     sources += rebase_path(gypi_values.chrome_browser_chromeos_sources,
                            ".",
                            "//chrome")
     deps += [ "//chrome/browser/chromeos" ]
   } else {
@@ skipping 726 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",
     ]
   }
 }