Implement a test for DefaultComponentInstallerTest

components/components_tests.gyp

 # Copyright 2014 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': {
     # This turns on e.g. the filename-based detection of which
     # platforms to include source files on (e.g. files ending in
     # _mac.h or _mac.cc are only compiled on MacOSX).
     'chromium_code': 1,
@@ skipping 112 matching lines @@
     ],
     'client_update_protocol_unittest_sources': [
       'client_update_protocol/ecdsa_unittest.cc',
     ],
     'cloud_devices_unittest_sources': [
       'cloud_devices/common/cloud_devices_urls_unittest.cc',
       'cloud_devices/common/printer_description_unittest.cc',
     ],
     'component_updater_unittest_sources': [
       'component_updater/component_updater_service_unittest.cc',
+      'component_updater/default_component_installer_unittest.cc',
       'component_updater/timer_unittest.cc',
     ],
     'content_settings_unittest_sources': [
       'content_settings/core/browser/content_settings_mock_provider.cc',
       'content_settings/core/browser/content_settings_mock_provider.h',
       'content_settings/core/browser/content_settings_registry_unittest.cc',
       'content_settings/core/browser/content_settings_rule_unittest.cc',
       'content_settings/core/browser/content_settings_utils_unittest.cc',
       'content_settings/core/browser/cookie_settings_unittest.cc',
       'content_settings/core/browser/website_settings_registry_unittest.cc',
@@ skipping 1892 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }