Add some empty classes for the embedded SharedWorker.

content/content_browser.gypi

 # Copyright (c) 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.
 
 {
   'dependencies': [
     '../third_party/re2/re2.gyp:re2',
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
@@ skipping 1250 matching lines @@
     'browser/webui/url_data_manager_backend.h',
     'browser/webui/url_data_source_impl.cc',
     'browser/webui/url_data_source_impl.h',
     'browser/webui/web_ui_data_source_impl.cc',
     'browser/webui/web_ui_data_source_impl.h',
     'browser/webui/web_ui_controller_factory_registry.cc',
     'browser/webui/web_ui_controller_factory_registry.h',
     'browser/webui/web_ui_impl.cc',
     'browser/webui/web_ui_impl.h',
     'browser/webui/web_ui_message_handler.cc',
+    'browser/worker_host/shared_worker_document_set.cc',
+    'browser/worker_host/shared_worker_document_set.h',
+    'browser/worker_host/shared_worker_host.cc',
+    'browser/worker_host/shared_worker_host.h',
+    'browser/worker_host/shared_worker_instance.cc',
+    'browser/worker_host/shared_worker_instance.h',
+    'browser/worker_host/shared_worker_message_filter.cc',
+    'browser/worker_host/shared_worker_message_filter.h',
+    'browser/worker_host/shared_worker_service_impl.cc',
+    'browser/worker_host/shared_worker_service_impl.h',
     'browser/worker_host/worker_document_set.cc',
     'browser/worker_host/worker_document_set.h',
     'browser/worker_host/worker_message_filter.cc',
     'browser/worker_host/worker_message_filter.h',
     'browser/worker_host/worker_process_host.cc',
     'browser/worker_host/worker_process_host.h',
     'browser/worker_host/worker_service_impl.cc',
     'browser/worker_host/worker_service_impl.h',
     'browser/worker_host/worker_storage_partition.cc',
     'browser/worker_host/worker_storage_partition.h',
@@ skipping 364 matching lines @@
         '../build/linux/system.gyp:dbus',
         '../dbus/dbus.gyp:dbus',
       ],
     }, {  # OS != "linux" or use_dbus==0
       'sources!': [
         'browser/geolocation/wifi_data_provider_linux.cc',
       ],
     }],
   ],
 }