Rate limit programmatic update checks for extensions

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 436 matching lines @@
       'browser/extensions/api/image_writer_private/operation_unittest.cc',
       'browser/extensions/api/image_writer_private/removable_storage_provider_chromeos_unittest.cc',
       'browser/extensions/api/image_writer_private/test_utils.cc',
       'browser/extensions/api/image_writer_private/write_from_file_operation_unittest.cc',
       'browser/extensions/api/image_writer_private/write_from_url_operation_unittest.cc',
       'browser/extensions/api/management/management_api_unittest.cc',
       'browser/extensions/api/omnibox/omnibox_unittest.cc',
       'browser/extensions/api/permissions/permissions_api_helpers_unittest.cc',
       'browser/extensions/api/preference/preference_api_prefs_unittest.cc',
       'browser/extensions/api/proxy/proxy_api_helpers_unittest.cc',
+      'browser/extensions/api/runtime/chrome_runtime_api_delegate_unittest.cc',
       'browser/extensions/api/signed_in_devices/id_mapping_helper_unittest.cc',
       'browser/extensions/api/signed_in_devices/signed_in_devices_api_unittest.cc',
       'browser/extensions/api/signed_in_devices/signed_in_devices_manager_unittest.cc',
       'browser/extensions/api/socket/combined_socket_unittest.cc',
       'browser/extensions/api/socket/socket_api_unittest.cc',
       'browser/extensions/api/socket/tcp_socket_unittest.cc',
       'browser/extensions/api/socket/tls_socket_unittest.cc',
       'browser/extensions/api/socket/udp_socket_unittest.cc',
       'browser/extensions/api/sockets_tcp_server/sockets_tcp_server_api_unittest.cc',
       'browser/extensions/api/storage/policy_value_store_unittest.cc',
@@ skipping 2542 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }