Activate the VariationsService for ChromeOS and ensure that it does not ping the server until the E…

chrome/chrome_tests.gypi

 # Copyright (c) 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' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 1505 matching lines @@
         'browser/profiles/profile_manager_unittest.cc',
         'browser/profiles/profile_shortcut_manager_unittest_win.cc',
         'browser/protector/composite_settings_change_unittest.cc',
         'browser/protector/homepage_change_unittest.cc',
         'browser/protector/prefs_backup_invalid_change_unittest.cc',
         'browser/protector/protected_prefs_watcher_unittest.cc',
         'browser/protector/session_startup_change_unittest.cc',
         'browser/renderer_host/intercept_navigation_resource_throttle_unittest.cc',
         'browser/renderer_host/plugin_info_message_filter_unittest.cc',
         'browser/renderer_host/web_cache_manager_unittest.cc',
+        'browser/resource_request_allowed_notifier_unittest.cc',
         'browser/resources/print_preview/data/measurement_system.js',
         'browser/resources/print_preview/data/measurement_system_unittest.gtestjs',
         'browser/resources/print_preview/print_preview_utils.js',
         'browser/resources/print_preview/print_preview_utils_unittest.gtestjs',
         'browser/resources/shared/js/cr.js',
         'browser/resources_util_unittest.cc',
         'browser/rlz/rlz_unittest.cc',
         'browser/safe_browsing/bloom_filter_unittest.cc',
         'browser/safe_browsing/browser_feature_extractor_unittest.cc',
         'browser/safe_browsing/chunk_range_unittest.cc',
@@ skipping 3211 matching lines @@
                 '--result', '<@(_outputs)',
                 '--isolate', 'browser_tests.isolate',
               ],
             },
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }