10 files declare their use of AliasManagerInterface

AliasPathProcessor.php in core/modules/path_alias/src/PathProcessor/AliasPathProcessor.php
MockAliasManager.php in core/modules/system/src/Tests/Routing/MockAliasManager.php
PathAliasListBuilder.php in core/modules/path/src/PathAliasListBuilder.php
PathAliasSubscriber.php in core/modules/path_alias/src/EventSubscriber/PathAliasSubscriber.php
PathHooksTest.php in core/modules/path_alias/tests/src/Kernel/PathHooksTest.php
Raw.php in core/modules/views/src/Plugin/views/argument_default/Raw.php
RawTest.php in core/modules/views/tests/src/Unit/Plugin/argument_default/RawTest.php
RequestPath.php in core/modules/system/src/Plugin/Condition/RequestPath.php
SiteInformationForm.php in core/modules/system/src/Form/SiteInformationForm.php
WorkspacesAliasManager.php in core/modules/workspaces/src/WorkspacesAliasManager.php

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