- move AddForwardReference and ResolveForwardReferences from nsIXULDocument to nsXULDocument, make them non-virtual. - make mForwardReferences an nsTArray<nsAutoPtr<nsForwardReference> > instead of nsAutoVoidArray. r=smaug, sr=roc git-svn-id: svn://10.0.0.236/trunk@225148 18797224-902f-48f8-a5cc-f745e15eee43