Any hit testing WebPage::performImmediateActionHitTestAtLocation would do on the loaded PDF plugin is currently compiled away for UnifiedPDFPlugin, notably because we have not implemented the rectForSelectionInRootView and lookupTextAtLocation methods on UnifiedPDFPlugin yet. Let's fix that.
<rdar://problem/122990495>
Pull request: https://github.com/WebKit/WebKit/pull/24483
Committed 274728@main (3ce9b3d1133f): <https://commits.webkit.org/274728@main> Reviewed commits have been landed. Closing PR #24483 and removing active labels.