content::ResourceDispatcherHostImpl changes for stale-while-revalidate

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': [
     '../base/base.gyp:base_static',
     '../components/url_formatter/url_formatter.gyp:url_formatter',
     '../crypto/crypto.gyp:crypto',
     '../device/battery/battery.gyp:device_battery',
@@ skipping 934 matching lines @@
       'browser/indexed_db/leveldb/leveldb_factory.h',
       'browser/indexed_db/leveldb/leveldb_iterator.h',
       'browser/indexed_db/leveldb/leveldb_iterator_impl.cc',
       'browser/indexed_db/leveldb/leveldb_iterator_impl.h',
       'browser/indexed_db/leveldb/leveldb_transaction.cc',
       'browser/indexed_db/leveldb/leveldb_transaction.h',
       'browser/indexed_db/leveldb/leveldb_write_batch.cc',
       'browser/indexed_db/leveldb/leveldb_write_batch.h',
       'browser/loader/async_resource_handler.cc',
       'browser/loader/async_resource_handler.h',
+      'browser/loader/async_revalidation_driver.cc',
+      'browser/loader/async_revalidation_driver.h',
       'browser/loader/certificate_resource_handler.cc',
       'browser/loader/certificate_resource_handler.h',
       'browser/loader/cross_site_resource_handler.cc',
       'browser/loader/cross_site_resource_handler.h',
       'browser/loader/detachable_resource_handler.cc',
       'browser/loader/detachable_resource_handler.h',
       'browser/loader/global_routing_id.h',
       'browser/loader/layered_resource_handler.cc',
       'browser/loader/layered_resource_handler.h',
       'browser/loader/mime_type_resource_handler.cc',
@@ skipping 1180 matching lines @@
       'sources': [
         'browser/vr/vr_device.cc',
         'browser/vr/vr_device.h',
         'browser/vr/vr_device_manager.cc',
         'browser/vr/vr_device_manager.h',
         'browser/vr/vr_device_provider.h',
       ]
     }],
   ],
 }