Move the thread test helper to base/test

chrome/chrome_tests.gypi

 # Copyright (c) 2011 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' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
@@ skipping 147 matching lines @@
         'test/test_url_request_context_getter.cc',
         'test/test_url_request_context_getter.h',
         'test/testing_browser_process.cc',
         'test/testing_browser_process.h',
         'test/testing_browser_process_test.h',
         'test/testing_pref_service.cc',
         'test/testing_pref_service.h',
         'test/testing_profile.cc',
         'test/testing_profile.h',
         'test/thread_observer_helper.h',
-        'test/thread_test_helper.cc',
-        'test/thread_test_helper.h',
         'test/ui_test_utils.cc',
         'test/ui_test_utils.h',
         'test/ui_test_utils_linux.cc',
         'test/ui_test_utils_mac.mm',
         'test/ui_test_utils_win.cc',
         'test/unit/chrome_test_suite.cc',
         'test/unit/chrome_test_suite.h',
         'test/values_test_util.cc',
         'test/values_test_util.h',
         '../content/browser/geolocation/arbitrator_dependency_factories_for_test.cc',
@@ skipping 3962 matching lines @@
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }
 
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 # tab-width:2
 # indent-tabs-mode:nil
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