Set up Finch trial for malware download warnings

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 733 matching lines @@
         'browser/download/all_download_item_notifier_unittest.cc',
         'browser/download/download_history_unittest.cc',
         'browser/download/download_query_unittest.cc',
         'browser/download/download_request_infobar_delegate_unittest.cc',
         'browser/download/download_request_limiter_unittest.cc',
         'browser/download/download_path_reservation_tracker_unittest.cc',
         'browser/download/download_shelf_unittest.cc',
         'browser/download/download_status_updater_unittest.cc',
         'browser/download/download_target_determiner_unittest.cc',
         'browser/download/download_ui_controller_unittest.cc',
+        'browser/download/download_util_unittest.cc',
         'browser/drive/drive_api_util_unittest.cc',
         'browser/drive/drive_uploader_unittest.cc',
         'browser/drive/event_logger_unittest.cc',
         'browser/drive/fake_drive_service_unittest.cc',
         'browser/enumerate_modules_model_unittest_win.cc',
         'browser/extensions/active_tab_unittest.cc',
         'browser/extensions/activity_log/activity_database_unittest.cc',
         'browser/extensions/activity_log/activity_log_unittest.cc',
         'browser/extensions/activity_log/activity_log_policy_unittest.cc',
         'browser/extensions/activity_log/counting_policy_unittest.cc',
@@ skipping 1954 matching lines @@
               # more details.
               'DebugInformationFormat': '3',
               'ProgramDataBaseFileName': '<(PRODUCT_DIR)/unit_tests.exe.pdb',
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }