Take notification API out of experimental.

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.
 {
   'targets': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 707 matching lines @@
         'browser/extensions/api/dial/dial_device_data_unittest.cc',
         'browser/extensions/api/dial/dial_registry_unittest.cc',
         'browser/extensions/api/dial/dial_service_unittest.cc',
         'browser/extensions/api/discovery/discovery_api_unittest.cc',
         'browser/extensions/api/extension_action/extension_browser_actions_api_unittest.cc',
         'browser/extensions/api/file_system/file_system_api_unittest.cc',
         'browser/extensions/api/identity/web_auth_flow_unittest.cc',
         'browser/extensions/api/idle/idle_api_unittest.cc',
         'browser/extensions/api/messaging/native_message_process_host_unittest.cc',
         'browser/extensions/api/messaging/native_messaging_host_manifest_unittest.cc',
+        'browser/extensions/api/notifications/notifications_api_unittest.cc',
         'browser/extensions/api/omnibox/omnibox_unittest.cc',
         'browser/extensions/api/permissions/permissions_api_helpers_unittest.cc',
         'browser/extensions/api/proxy/proxy_api_helpers_unittest.cc',
         'browser/extensions/api/push_messaging/obfuscated_gaia_id_fetcher_unittest.cc',
         'browser/extensions/api/push_messaging/push_messaging_invalidation_handler_unittest.cc',
         'browser/extensions/api/serial/serial_port_enumerator_unittest.cc',
         'browser/extensions/api/socket/socket_api_unittest.cc',
         'browser/extensions/api/socket/tcp_socket_unittest.cc',
         'browser/extensions/api/socket/udp_socket_unittest.cc',
         'browser/extensions/api/system_info_storage/storage_info_provider_linux_unittest.cc',
@@ skipping 1657 matching lines @@
               # more details.
               'DebugInformationFormat': '3',
               'ProgramDataBaseFileName': '<(PRODUCT_DIR)/unit_tests.exe.pdb',
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }