fast/text/backslash-to-yen-sign-euc.html fails on Windows, and has failed since it was first added in <http://trac.webkit.org/changeset/63995>. You can see many cases where a backslash is expected and we get a yen sign, and vice-versa.
Thanks for filing this issue. r63597 changed how the fonts in input elements are considered. I think the failures in the first commit will be gone. The failures I piled should be removed by the patch on Bug 47017. Sorry for confusion.
Committed r69568: <http://trac.webkit.org/changeset/69568>