Rubber-stamped by Oliver Hunt.

        3 (speculative) fixes for the new layout test: select-popup-pagekeys
         - Help Windows to pass by adding platform results.
         - Fix the general expected results.
         - Fix select-popup-pagekeys on gtk which doesn't seem to implement eventSender.

        * fast/forms/select-popup-pagekeys-expected.txt:
        * fast/forms/select-popup-pagekeys.html:
        * platform/win/fast/forms/select-popup-pagekeys-expected.txt: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@46261 268f45cc-cd09-0410-ab3c-d52691b4dbfc