Create base::WorkerPoolJob. Use it for HostResolverImpl and DirectoryLister.

base/base.gyp

 # Copyright (c) 2010 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,
   },
   'includes': [
     'base.gypi',
@@ skipping 154 matching lines @@
         'win_util_unittest.cc',
         'win/event_trace_consumer_unittest.cc',
         'win/event_trace_controller_unittest.cc',
         'win/event_trace_provider_unittest.cc',
         'win/i18n_unittest.cc',
         'win/pe_image_unittest.cc',
         'win/registry_unittest.cc',
         'win/scoped_bstr_unittest.cc',
         'win/scoped_comptr_unittest.cc',
         'win/scoped_variant_unittest.cc',
+        'worker_pool_job_unittest.cc',
         'worker_pool_posix_unittest.cc',
         'worker_pool_unittest.cc',
       ],
       'dependencies': [
         'base',
         'base_i18n',
         'test_support_base',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
       ],
@@ skipping 139 matching lines @@
       ],
     }],
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: