[cros] Network dropdown button in WebUI.

chrome/chrome_browser.gypi

 # Copyright (c) 2011 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'dependencies': [
@@ skipping 3427 matching lines @@
         'browser/ui/webui/chromeos/login/core_oobe_handler.cc',
         'browser/ui/webui/chromeos/login/core_oobe_handler.h',
         'browser/ui/webui/chromeos/login/enterprise_enrollment_screen_handler.cc',
         'browser/ui/webui/chromeos/login/enterprise_enrollment_screen_handler.h',
         'browser/ui/webui/chromeos/login/eula_screen_handler.cc',
         'browser/ui/webui/chromeos/login/eula_screen_handler.h',
         'browser/ui/webui/chromeos/login/login_ui.cc',
         'browser/ui/webui/chromeos/login/login_ui.h',
         'browser/ui/webui/chromeos/login/login_ui_helpers.cc',
         'browser/ui/webui/chromeos/login/login_ui_helpers.h',
+        'browser/ui/webui/chromeos/login/network_dropdown.cc',
+        'browser/ui/webui/chromeos/login/network_dropdown.h',
         'browser/ui/webui/chromeos/login/network_screen_handler.cc',
         'browser/ui/webui/chromeos/login/network_screen_handler.h',
         'browser/ui/webui/chromeos/login/oobe_ui.cc',
         'browser/ui/webui/chromeos/login/oobe_ui.h',
         'browser/ui/webui/chromeos/login/signin_screen_handler.cc',
         'browser/ui/webui/chromeos/login/signin_screen_handler.h',
         'browser/ui/webui/chromeos/login/update_screen_handler.cc',
         'browser/ui/webui/chromeos/login/update_screen_handler.h',
         'browser/ui/webui/chromeos/login/user_image_screen_handler.cc',
         'browser/ui/webui/chromeos/login/user_image_screen_handler.h',
@@ skipping 1441 matching lines @@
       ],
       'export_dependent_settings': [
         'in_memory_url_index_cache_proto',
       ],
       # This target exports a hard dependency because it includes generated
       # header files.
       'hard_dependency': 1,
     },
   ],
 }