While I was working on bug 57353, Morita was working on bug 55571. So the patch for bug 55571 ended up moving older implementation of Editor::windowRectForRange() to SpellingCorrectionController::windowRectForRange().
<rdar://problem/9312513>
Created attachment 90463 [details] Patch (v1)
Comment on attachment 90463 [details] Patch (v1) r=me
Comment on attachment 90463 [details] Patch (v1) Clearing flags on attachment: 90463 Committed r84459: <http://trac.webkit.org/changeset/84459>
All reviewed patches have been landed. Closing bug.