Identify the hung thread using the Wait Chain Traversal API

chrome/chrome_watcher/chrome_watcher.gypi

 # Copyright 2014 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/util/version.gypi',
     '../../build/win_precompile.gypi',
@@ skipping 39 matching lines @@
     {
       'target_name': 'chrome_watcher',
       'type': 'loadable_module',
       'include_dirs': [
         '../..',
       ],
       'sources': [
         '<(SHARED_INTERMEDIATE_DIR)/chrome_watcher/chrome_watcher_version.rc',
         'chrome_watcher.def',
         'chrome_watcher_main.cc',
+        'wait_chain_util_win.cc',
+        'wait_chain_util_win.h',
       ],
       'dependencies': [
         'chrome_watcher_client',
         'chrome_watcher_resources',
         'installer_util',
         '../base/base.gyp:base',
         '../components/components.gyp:browser_watcher',
         '../third_party/kasko/kasko.gyp:kasko',
         '../components/components.gyp:crash_component'
       ],
       'msvs_settings': {
         'VCLinkerTool': {
           # Set /SUBSYSTEM:WINDOWS.
           'SubSystem': '2',
         },
       },
     },
   ],
 }