12 files declare their use of Feed in Zircon Profile 8

aggregator.module in core/modules/aggregator/aggregator.module

Used to aggregate syndicated content (RSS, RDF, and Atom).

AggregatorFeedViewsFieldAccessTest.php in core/modules/aggregator/src/Tests/Views/AggregatorFeedViewsFieldAccessTest.php

Contains \Drupal\aggregator\Tests\Views\AggregatorFeedViewsFieldAccessTest.

AggregatorItemViewsFieldAccessTest.php in core/modules/aggregator/src/Tests/Views/AggregatorItemViewsFieldAccessTest.php

Contains \Drupal\aggregator\Tests\Views\AggregatorItemViewsFieldAccessTest.

AggregatorTestBase.php in core/modules/aggregator/src/Tests/AggregatorTestBase.php

Contains \Drupal\aggregator\Tests\AggregatorTestBase.

AggregatorTitleTest.php in core/modules/aggregator/src/Tests/AggregatorTitleTest.php

Contains \Drupal\aggregator\Tests\AggregatorTitleTest.

FeedCacheTagsTest.php in core/modules/aggregator/src/Tests/FeedCacheTagsTest.php

Contains \Drupal\aggregator\Tests\FeedCacheTagsTest.

FeedProcessorPluginTest.php in core/modules/aggregator/src/Tests/FeedProcessorPluginTest.php

Contains \Drupal\aggregator\Tests\FeedProcessorPluginTest.

FeedValidationTest.php in core/modules/aggregator/src/Tests/FeedValidationTest.php

Contains \Drupal\aggregator\Tests\FeedValidationTest.

ItemCacheTagsTest.php in core/modules/aggregator/src/Tests/ItemCacheTagsTest.php

Contains \Drupal\aggregator\Tests\ItemCacheTagsTest.

MigrateAggregatorFeedTest.php in core/modules/aggregator/src/Tests/Migrate/d6/MigrateAggregatorFeedTest.php

Contains \Drupal\aggregator\Tests\Migrate\d6\MigrateAggregatorFeedTest.

MigrateAggregatorFeedTest.php in core/modules/aggregator/src/Tests/Migrate/d7/MigrateAggregatorFeedTest.php

Contains \Drupal\aggregator\Tests\Migrate\d7\MigrateAggregatorFeedTest.

UpdateFeedItemTest.php in core/modules/aggregator/src/Tests/UpdateFeedItemTest.php

Contains \Drupal\aggregator\Tests\UpdateFeedItemTest.