The call to MACaptionAppearanceGetDisplayType in CaptionUserPreferencesMediaAF::captionDisplayMode() is showing up in samples when called from HTMLMediaElement::finishInitialization().
Created attachment 338781 [details] Patch
<rdar://problem/39737230>
Comment on attachment 338781 [details] Patch Thanks for reviewing!
Comment on attachment 338781 [details] Patch Clearing flags on attachment: 338781 Committed r231045: <https://trac.webkit.org/changeset/231045>
All reviewed patches have been landed. Closing bug.