Bug 782196 - Temporarily disable layout/reftests/bugs/598726-1.html on WinXP as well (as Win7), for frequent failures; r=philor

layout/reftests/bugs/reftest.list

@@ -1586,7 +1586,7 @@ skip-if(!browserIsRemote) == 593243-2.html 593243-2-ref.html # bug 593168
 == 594624-1.html 594624-1-ref.html
 == 594737-1.html 594737-1-ref.html
 == 597721-1.html 597721-1-ref.html
-random-if(/^Windows\x20NT\x206\.1/.test(http.oscpu)) needs-focus == 598726-1.html 598726-1-ref.html # Fails on Win7, bug 782196
+random-if(winWidget) needs-focus == 598726-1.html 598726-1-ref.html # Fails on Windows, bug 782196
 == 599113-1.html 599113-1-ref.html
 fails-if(!haveTestPlugin) == 599476.html 599476-ref.html
 == 600045-1.html 600045-1-ref.html