Identify the hung thread using the Wait Chain Traversal API

base/base.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/win_precompile.gypi',
@@ skipping 586 matching lines @@
         'win/object_watcher_unittest.cc',
         'win/pe_image_unittest.cc',
         'win/registry_unittest.cc',
         'win/scoped_bstr_unittest.cc',
         'win/scoped_comptr_unittest.cc',
         'win/scoped_handle_unittest.cc',
         'win/scoped_process_information_unittest.cc',
         'win/scoped_variant_unittest.cc',
         'win/shortcut_unittest.cc',
         'win/startup_information_unittest.cc',
+        'win/wait_chain_unittest.cc',
         'win/win_util_unittest.cc',
         'win/windows_version_unittest.cc',
         'win/wrapped_window_proc_unittest.cc',
         '<@(trace_event_test_sources)',
       ],
       'dependencies': [
         'base',
         'base_i18n',
         'base_message_loop_tests',
         'base_static',
@@ skipping 1097 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'base_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }