Improves first run dialog performance on Win8

chrome/chrome_tests.gypi

 # Copyright 2013 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': {
     'build_angle_deqp_tests%': 0,
     'chrome_browser_extensions_test_support_sources': [
       # A list of sources which is shared between different browser tests.
       'browser/apps/app_browsertest_util.cc',
       'browser/apps/app_browsertest_util.h',
@@ skipping 537 matching lines @@
       'browser/ui/webui/options/multilanguage_options_browsertest.cc',
       'browser/ui/webui/options/multilanguage_options_browsertest.h',
       'browser/ui/webui/options/options_browsertest.cc',
       'browser/ui/webui/options/options_ui_browsertest.cc',
       'browser/ui/webui/options/options_ui_browsertest.h',
       'browser/ui/webui/options/preferences_browsertest.cc',
       'browser/ui/webui/options/preferences_browsertest.h',
       'browser/ui/webui/password_manager_internals/password_manager_internals_ui_browsertest.cc',
       'browser/ui/webui/policy_ui_browsertest.cc',
       'browser/ui/webui/print_preview/print_preview_ui_browsertest.cc',
+      'browser/ui/webui/set_as_default_browser_ui_browsertest_win.cc',
       'browser/ui/webui/settings/md_settings_ui_browsertest.cc',
       'browser/ui/webui/signin/inline_login_ui_browsertest.cc',
       'browser/ui/webui/signin/user_manager_ui_browsertest.cc',
       'browser/ui/webui/uber/uber_ui_browsertest.cc',
       'browser/ui/webui/web_ui_test_handler.cc',
       'browser/ui/webui/web_ui_test_handler.h',
       'browser/ui/webui/webui_browsertest.cc',
       'browser/ui/webui/webui_webview_browsertest.cc',
       'browser/ui/zoom/zoom_controller_browsertest.cc',
       'browser/unload_browsertest.cc',
@@ skipping 3023 matching lines @@
             'browser',
           ],
           'sources': [
             'tools/service_discovery_sniffer/service_discovery_sniffer.cc',
             'tools/service_discovery_sniffer/service_discovery_sniffer.h',
           ],
         }]
     }],
   ],  # 'conditions'
 }