Replace OptionSetTraits/OptionSetValues with EnumTraits/EnumValues. Upon further reflection, we should just use EnumTraits/EnumValues for validating OptionSet<>. There's no need to duplicate these enum value lists, and it removes duplicate lists for WebCore::DragOperation and WebCore::DragSourceAction in DragActions.h.
<rdar://problem/64423749>
Created attachment 402046 [details] Patch v1
Comment on attachment 402046 [details] Patch v1 Code removal! Yes. r=me
Committed r263178: <https://trac.webkit.org/changeset/263178> All reviewed patches have been landed. Closing bug and clearing flags on attachment 402046 [details].