Add extensions code to use common updater in components/update_client/

extensions/extensions_tests.gypi

 # Copyright 2015 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': {
     'extensions_browsertests_sources': [
       'browser/api/audio/audio_apitest.cc',
       'browser/api/bluetooth_socket/bluetooth_socket_apitest.cc',
       'browser/api/dns/dns_apitest.cc',
       'browser/api/hid/hid_apitest.cc',
       'browser/api/printer_provider/printer_provider_apitest.cc',
       'browser/api/socket/socket_apitest.cc',
       'browser/api/sockets_tcp/sockets_tcp_apitest.cc',
       'browser/api/sockets_tcp_server/sockets_tcp_server_apitest.cc',
       'browser/api/sockets_udp/sockets_udp_apitest.cc',
       'browser/api/system_cpu/system_cpu_apitest.cc',
       'browser/api/system_display/system_display_apitest.cc',
       'browser/api/system_memory/system_memory_apitest.cc',
       'browser/api/system_network/system_network_apitest.cc',
       'browser/api/system_storage/storage_api_test_util.cc',
       'browser/api/system_storage/storage_api_test_util.h',
       'browser/api/system_storage/system_storage_apitest.cc',
       'browser/api/system_storage/system_storage_eject_apitest.cc',
       'browser/api/usb/usb_apitest.cc',
       'browser/guest_view/app_view/app_view_apitest.cc',
       'browser/guest_view/web_view/web_view_apitest.cc',
       'browser/guest_view/web_view/web_view_apitest.h',
       'browser/guest_view/web_view/web_view_media_access_apitest.cc',
-      'browser/updater/update_service_browsertest.cc',
       'shell/browser/geolocation/geolocation_apitest.cc',
       'shell/browser/shell_browsertest.cc',
       'shell/test/shell_apitest.cc',
       'shell/test/shell_apitest.h',
       'shell/test/shell_test.cc',
       'shell/test/shell_test.h',
       'shell/test/shell_test_launcher_delegate.cc',
       'shell/test/shell_test_launcher_delegate.h',
       'shell/test/shell_tests_main.cc',
     ],
@@ skipping 50 matching lines @@
       'browser/mojo/stash_backend_unittest.cc',
       'browser/process_manager_unittest.cc',
       'browser/process_map_unittest.cc',
       'browser/quota_service_unittest.cc',
       'browser/runtime_data_unittest.cc',
       'browser/sandboxed_unpacker_unittest.cc',
       'browser/extension_throttle_simulation_unittest.cc',
       'browser/extension_throttle_test_support.cc',
       'browser/extension_throttle_test_support.h',
       'browser/extension_throttle_unittest.cc',
+      'browser/updater/update_service_unittest.cc',
       'browser/value_store/leveldb_value_store_unittest.cc',
       'browser/value_store/testing_value_store_unittest.cc',
       'browser/value_store/value_store_change_unittest.cc',
       'browser/value_store/value_store_frontend_unittest.cc',
       'browser/value_store/value_store_unittest.cc',
       'browser/value_store/value_store_unittest.h',
       'browser/verified_contents_unittest.cc',
       'browser/warning_service_unittest.cc',
       'common/api/declarative/declarative_manifest_unittest.cc',
       'common/api/printer_provider/usb_printer_manifest_unittest.cc',
@@ skipping 50 matching lines @@
       'renderer/scoped_web_frame.h',
       'renderer/script_context_set_unittest.cc',
       'renderer/script_context_unittest.cc',
       'renderer/utils_unittest.cc',
       'shell/browser/shell_web_contents_modal_dialog_manager.cc',
       'test/extensions_unittests_main.cc',
       'utility/unpacker_unittest.cc',
     ],
   },
 }