Add desktop engagement metrics.

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.
 {
   'variables': {
     'chrome_unit_tests_sources': [
       # histograms.xml is analyzed by AboutFlagsHistogramTest, so this
       # dependency is needed to make commit bots run unit_tests on
       # histograms.xml changes.
       '../tools/metrics/histograms/histograms.xml',
@@ skipping 1601 matching lines @@
       'utility/importer/edge_database_reader_unittest_win.cc',
       'utility/importer/firefox_importer_unittest.cc',
       'utility/importer/firefox_importer_unittest_messages_internal.h',
       'utility/importer/firefox_importer_unittest_utils.h',
       'utility/importer/firefox_importer_unittest_utils_mac.cc',
       'utility/importer/safari_importer_unittest.mm',
     ],
     # Everything but Android, ChromeOS and iOS (iOS is handled separately).
     'chrome_unit_tests_non_android_or_chromeos_sources': [
       'browser/media/native_desktop_media_list_unittest.cc',
+      'browser/metrics/desktop_engagement/desktop_engagement_service_unittest.cc',
       'browser/signin/cross_device_promo_unittest.cc',
       'browser/signin/signin_global_error_unittest.cc',
       'browser/sync/sync_global_error_unittest.cc',
       'browser/ui/webui/signin/signin_create_profile_handler_unittest.cc',
       'browser/ui/webui/signin/sync_confirmation_handler_unittest.cc',
       'browser/upgrade_detector_impl_unittest.cc',
     ],
     'chrome_unit_tests_app_list_sources': [
       'browser/apps/drive/drive_app_mapping_unittest.cc',
       'browser/ui/app_list/app_context_menu_unittest.cc',
@@ skipping 1402 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }