Move the thread test helper to base/test

base/base.gyp

 # 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': {
     'chromium_code': 1,
   },
   'includes': [
     'base.gypi',
@@ skipping 323 matching lines @@
         'test/test_file_util_linux.cc',
         'test/test_file_util_mac.cc',
         'test/test_file_util_posix.cc',
         'test/test_file_util_win.cc',
         'test/test_suite.cc',
         'test/test_suite.h',
         'test/test_switches.cc',
         'test/test_switches.h',
         'test/test_timeouts.cc',
         'test/test_timeouts.h',
+        'test/thread_test_helper.cc',
+        'test/thread_test_helper.h',
       ],
     },
     {
       'target_name': 'test_support_perf',
       'type': 'static_library',
       'dependencies': [
         'base',
         '../testing/gtest.gyp:gtest',
       ],
       'sources': [
@@ skipping 36 matching lines @@
       ],
     }],
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: