The following editing/spelling tests should verify spelling markers asynchronously since synchronous spell checking will be deprecated, LayoutTests/editing/spelling/spelling-should-select-multiple-words.html LayoutTests/editing/spelling/spelling-exactly-selected-multiple-words.html Currently, there is no WebKit port which is implementing this feature. See bug 114470.
We've decided to remove those tests in bug 129482 since neither WebKit port supports spellchecking of multiple words.