Enforce the 'requirements' field in manifests.

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 1980 matching lines @@
         'common/extensions/manifest_tests/extension_manifests_isolatedapp_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_launch_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_manifest_version_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_offline_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_old_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_options_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_override_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_pageaction_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_platformapp_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_portsinpermissions_unittest.cc',
+        'common/extensions/manifest_tests/extension_manifests_requirements_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_sandboxed_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_scriptbadge_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_storage_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_tts_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_ui_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_update_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_validapp_unittest.cc',
         'common/extensions/manifest_tests/extension_manifests_web_unittest.cc',
         'common/extensions/matcher/substring_set_matcher_unittest.cc',
         'common/extensions/matcher/url_matcher_unittest.cc',
@@ skipping 879 matching lines @@
         'browser/extensions/lazy_background_page_test_util.h',
         'browser/extensions/mutation_observers_apitest.cc',
         'browser/extensions/notifications_apitest.cc',
         'browser/extensions/options_page_apitest.cc',
         'browser/extensions/page_action_browsertest.cc',
         'browser/extensions/platform_app_browsertest.cc',
         'browser/extensions/platform_app_browsertest_util.cc',
         'browser/extensions/platform_app_browsertest_util.h',
         'browser/extensions/plugin_apitest.cc',
         'browser/extensions/process_management_browsertest.cc',
+        'browser/extensions/requirements_checker_browsertest.cc',
         'browser/extensions/sandboxed_pages_apitest.cc',
         'browser/extensions/shadow_dom_apitest.cc',
         'browser/extensions/settings/settings_apitest.cc',
         'browser/extensions/stubs_apitest.cc',
         'browser/extensions/subscribe_page_action_browsertest.cc',
         'browser/extensions/system/system_apitest.cc',
         'browser/extensions/web_contents_browsertest.cc',
         'browser/extensions/webstore_inline_install_browsertest.cc',
         'browser/extensions/window_open_apitest.cc',
         'browser/external_extension_browsertest.cc',
@@ skipping 1856 matching lines @@
                 '--result', '<@(_outputs)',
                 '--isolate', 'browser_tests.isolate',
               ],
             },
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }