The implementation of Node::offsetInCharacters() is identical to Node::isCharacterDataNode(). It's super confusing because offsetInCharacters() sounds like a function which returns the number of characters in the node, or some kind of an offset within the characters.
Created attachment 351052 [details] Cleanup
Committed r236607: <https://trac.webkit.org/changeset/236607>
<rdar://problem/44872083>