WebKitTestRunner needs an implementation of eventSender.beginDragWithFiles
https://bugs.webkit.org/show_bug.cgi?id=64285

* platform/wk2/TestExpectations:
Skip another test that uses eventSender.beginDragWithFiles.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@141425 268f45cc-cd09-0410-ab3c-d52691b4dbfc