XMLHttpRequest.open(). For xmlextras, r=heikki, sr=jband. For caps,
r=bzbarsky, sr=jst
147754 - Add same-origin check to XMLSerializer. Patch by jst. r=mstoltz,
sr=jband
113351 - Add same-origin check to XSL Include. Patch by peterv and jst,
r=mstoltz, sr=rpotts
135267 - Add same-origin check to stylesheets included via LINK tags.
r=dveditz, sr=scc
git-svn-id: svn://10.0.0.236/trunk@123373 18797224-902f-48f8-a5cc-f745e15eee43