Factor Google Now welcome notifications out of DesktopNotificationService.

chrome/chrome_tests_unit.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_unit_tests_sources': [
       '../apps/app_shim/app_shim_host_mac_unittest.cc',
       '../apps/app_shim/extension_app_shim_handler_mac_unittest.cc',
       '../apps/saved_files_service_unittest.cc',
       '../components/autofill/content/renderer/test_password_autofill_agent.cc',
@@ skipping 544 matching lines @@
       'browser/net/pref_proxy_config_tracker_impl_unittest.cc',
       'browser/net/probe_message_unittest.cc',
       'browser/net/proxy_policy_handler_unittest.cc',
       'browser/net/quota_policy_channel_id_store_unittest.cc',
       'browser/net/safe_search_util_unittest.cc',
       'browser/net/spdyproxy/data_reduction_proxy_chrome_configurator_unittest.cc',
       'browser/net/spdyproxy/data_reduction_proxy_settings_unittest_android.cc',
       'browser/net/ssl_config_service_manager_pref_unittest.cc',
       'browser/net/url_info_unittest.cc',
       'browser/notifications/desktop_notification_profile_util_unittest.cc',
-      'browser/notifications/extension_welcome_notification_unittest.cc',
+      'browser/notifications/extensions/extension_welcome_notification_unittest.cc',
       'browser/notifications/login_state_notification_blocker_chromeos_unittest.cc',
       'browser/notifications/message_center_notifications_unittest.cc',
       'browser/notifications/message_center_settings_controller_unittest.cc',
       'browser/notifications/notification_conversion_helper_unittest.cc',
       'browser/omaha_query_params/chrome_omaha_query_params_delegate_unittest.cc',
       'browser/password_manager/chrome_password_manager_client_unittest.cc',
       'browser/password_manager/native_backend_gnome_x_unittest.cc',
       'browser/password_manager/native_backend_kwallet_x_unittest.cc',
       'browser/password_manager/password_manager_internals_service_unittest.cc',
       'browser/password_manager/password_manager_metrics_util_unittest.cc',
@@ skipping 2307 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }