void HTMLMediaElement::SetTextTrackKindUserPreferenceForAllMediaElements(
    Document* document) {
  auto it = DocumentToElementSetMap().find(document);
  if (it == DocumentToElementSetMap().end())
    return;
  DCHECK(it->value);
  WeakMediaElementSet& elements = *it->value;
  for (const auto& element : elements)
    element->AutomaticTrackSelectionForUpdatedUserPreference();
}

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