Create a field trial to test if we can detect good QPC implementations.

chrome/chrome_tests_unit.gypi

 # Copyright 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.
 {
   'targets': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 863 matching lines @@
         'browser/media_galleries/mac/mtp_device_delegate_impl_mac_unittest.mm',
         'browser/media_galleries/media_file_system_registry_unittest.cc',
         'browser/media_galleries/media_galleries_dialog_controller_mock.cc',
         'browser/media_galleries/media_galleries_dialog_controller_mock.h',
         'browser/media_galleries/media_galleries_preferences_unittest.cc',
         'browser/media_galleries/win/mtp_device_object_enumerator_unittest.cc',
         'browser/metrics/metrics_log_unittest.cc',
         'browser/metrics/metrics_log_serializer_unittest.cc',
         'browser/metrics/metrics_service_unittest.cc',
         'browser/metrics/thread_watcher_unittest.cc',
+        'browser/metrics/time_ticks_experiment_unittest.cc',
         'browser/metrics/variations/network_time_tracker_unittest.cc',
         'browser/metrics/variations/variations_service_unittest.cc',
         'browser/metrics/variations/resource_request_allowed_notifier_test_util.cc',
         'browser/metrics/variations/resource_request_allowed_notifier_test_util.h',
         'browser/metrics/variations/resource_request_allowed_notifier_unittest.cc',
         'browser/nacl_host/nacl_validation_cache_unittest.cc',
         'browser/nacl_host/pnacl_file_host_unittest.cc',
         'browser/net/chrome_fraudulent_certificate_reporter_unittest.cc',
         'browser/net/chrome_net_log_unittest.cc',
         'browser/net/chrome_network_delegate_unittest.cc',
@@ skipping 1528 matching lines @@
               # more details.
               'DebugInformationFormat': '3',
               'ProgramDataBaseFileName': '<(PRODUCT_DIR)/unit_tests.exe.pdb',
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }