REGRESSION (r83928 or before): Some tests failing assertions in MarkStack::internalAppend
/ MarkStack::drain.
https://bugs.webkit.org/show_bug.cgi?id=58657

Add inspector/styles/styles-cancel-editing.html to the Windows XP Skipped list because it
has been crashing under MarkStack::drain on the Windows XP bots.

* platform/win-xp/Skipped:



git-svn-id: svn://svn.chromium.org/blink/trunk@85479 bbb929c8-8fbe-4397-9dbb-9b2b20218538