Get FileSelect dialog work on athena

chrome/chrome_browser_ui.gypi

 # Copyright 2012 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.
 
 {
   'variables': {
     'chrome_browser_ui_non_ios_sources': [
       'browser/ui/accelerator_utils.h',
       'browser/ui/android/android_about_app_info.cc',
       'browser/ui/android/android_about_app_info.h',
@@ skipping 2445 matching lines @@
     # Used when Ash is enabled but not ChromeOS.
     'chrome_browser_ui_ash_non_chromeos': [
       'browser/ui/ash/chrome_shell_delegate_views.cc',
       'browser/ui/ash/multi_user/multi_user_context_menu.cc',
       'browser/ui/ash/multi_user/multi_user_context_menu.h',
       'browser/ui/ash/session_state_delegate_views.cc',
       'browser/ui/ash/session_state_delegate_views.h',
     ],
     # Used when athena is enabled.
     'chrome_browser_ui_athena_sources': [
+      'browser/ui/views/athena/athena_util.cc',
+      'browser/ui/views/athena/athena_util.h',
       'browser/ui/views/athena/chrome_browser_main_extra_parts_athena.cc',
       'browser/ui/views/athena/chrome_browser_main_extra_parts_athena.h',
     ],
     # Counts desktop Linux and ChromeOS.
     'chrome_browser_ui_linux_sources': [
       'browser/ui/startup/autolaunch_prompt.cc',
       'browser/ui/views/apps/chrome_apps_client_views.cc',
       'browser/ui/views/frame/taskbar_decorator.cc',
       'browser/ui/webui/certificate_viewer_ui.cc',
       'browser/ui/webui/certificate_viewer_ui.h',
@@ skipping 509 matching lines @@
         }],
         ['OS!="android" and OS!="ios"', {
           'dependencies': [
             '../device/bluetooth/bluetooth.gyp:device_bluetooth',
           ],
         }],
       ],
     },
   ],
 }