First I'm going to make the test editing/mac/spelling/editing-word-with-marker-1.html work on iOS. That change is significant enough that I want to do it in its own patch. Once done, we can move the test to editing/spelling/.
Created attachment 399622 [details]
Created attachment 399784 [details]
Committed r261896: <https://trac.webkit.org/changeset/261896>