More scaffolding, add class ServiceWorkerProviderHost.

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': [
     'browser/speech/proto/speech_proto.gyp:speech_proto',
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
@@ skipping 721 matching lines @@
     'browser/message_port_service.h',
     'browser/mime_registry_message_filter.cc',
     'browser/mime_registry_message_filter.h',
     'browser/service_worker/service_worker_context.h',
     'browser/service_worker/service_worker_context_core.cc',
     'browser/service_worker/service_worker_context_core.h',
     'browser/service_worker/service_worker_context_wrapper.cc',
     'browser/service_worker/service_worker_context_wrapper.h',
     'browser/service_worker/service_worker_dispatcher_host.cc',
     'browser/service_worker/service_worker_dispatcher_host.h',
+    'browser/service_worker/service_worker_provider_host.cc',
+    'browser/service_worker/service_worker_provider_host.h',
     'browser/service_worker/service_worker_registration.cc',
     'browser/service_worker/service_worker_registration.h',
     'browser/service_worker/service_worker_version.cc',
     'browser/service_worker/service_worker_version.h',
     'browser/net/browser_online_state_observer.cc',
     'browser/net/browser_online_state_observer.h',
     'browser/net/sqlite_persistent_cookie_store.cc',
     'browser/net/sqlite_persistent_cookie_store.h',
     'browser/net/view_blob_internals_job_factory.cc',
     'browser/net/view_blob_internals_job_factory.h',
@@ skipping 859 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',
       ],
     }],
   ],
 }