Add chrome/browser/ui to the GN build.

build/config/features.gni

 # 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.
 
 # This file contains UI-related build flags. It should theoretically be in the
 # src/ui directory and only things that depend on the ui module should get the
 # definitions.
 #
 # However, today we have many "bad" dependencies on some of these flags from,
 # e.g. base, so they need to be global.
 #
 # See also build/config/ui.gni
 
 if (is_android) {
   import("//build/config/android/config.gni")
 }
 
 declare_args() {
   # Multicast DNS.
   enable_mdns = is_win || is_linux
 
   enable_plugins = !is_android || !is_ios
 
   # Enables Native Client support.
   enable_nacl = (!is_ios && !is_android)
+
+  # If debug_devtools is set to true, JavaScript files for DevTools are stored
+  # as is and loaded from disk. Otherwise, a concatenated file is stored in
+  # resources.pak. It is still possible to load JS files from disk by passing
+  # --debug-devtools cmdline switch.
+  debug_devtools = false
 }
 
 # Additional dependent variables -----------------------------------------------
 
 # Set the version of CLD.
 #   0: Don't specify the version. This option is for the Finch testing.
 #   1: Use only CLD1.
 #   2: Use only CLD2.
 if (is_android || is_ios) {
   cld_version = 1
@@ skipping 101 matching lines @@
 enable_autofill_dialog = !is_ios && !(is_android && is_android_webview_build)
 
 enable_wifi_bootstrapping = is_win || is_mac
 
 # Image loader extension is enabled on ChromeOS only.
 enable_image_loader_extension = is_chromeos
 
 enable_remoting = !is_ios && !is_android
 
 enable_google_now = !is_ios && !is_android
+
+enable_one_click_signin = is_win || is_mac || (is_linux && !is_chromeos)
+
+# Chrome OS: whether to also build the upcoming version of
+# ChromeVox, which can then be enabled via a command-line switch.
+enable_chromevox_next = false