Register a Service Worker when an extension is enabled.

extensions/extensions.gyp

 # 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': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 310 matching lines @@
         'browser/process_map.cc',
         'browser/process_map.h',
         'browser/process_map_factory.cc',
         'browser/process_map_factory.h',
         'browser/quota_service.cc',
         'browser/quota_service.h',
         'browser/renderer_startup_helper.cc',
         'browser/renderer_startup_helper.h',
         'browser/runtime_data.cc',
         'browser/runtime_data.h',
+        'browser/service_worker_manager.cc',
+        'browser/service_worker_manager.h',
         'browser/update_observer.h',
         'browser/value_store/leveldb_value_store.cc',
         'browser/value_store/leveldb_value_store.h',
         'browser/value_store/testing_value_store.cc',
         'browser/value_store/testing_value_store.h',
         'browser/value_store/value_store.cc',
         'browser/value_store/value_store.h',
         'browser/value_store/value_store_change.cc',
         'browser/value_store/value_store_change.h',
         'browser/value_store/value_store_frontend.cc',
@@ skipping 44 matching lines @@
         'common/test_util.cc',
         'common/test_util.h',
         'common/value_builder.cc',
         'common/value_builder.h',
       ],
       # Disable c4267 warnings until we fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
   ]
 }