eventSender.beginDragWithFiles had been implemented in Windows, related tests should...

eventSender.beginDragWithFiles had been implemented in Windows, related tests should be removed from Skipped.
https://bugs.webkit.org/show_bug.cgi?id=87610

Patch by Xueqing Huang <huangxueqing@baidu.com> on 2012-07-03
Reviewed by Jessie Berlin.

* platform/win/Skipped:
* platform/win/fast/dom/Window: Removed.
* platform/win/fast/dom/Window/window-postmessage-clone-frames-expected.txt: Removed.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121814 268f45cc-cd09-0410-ab3c-d52691b4dbfc