Bug 498628 - autohide="true" should be a no-op for menu toolbars on Linux. r=neil

toolkit/content/xul.css

@@ -239,7 +239,9 @@ toolbar[type="menubar"] {
   min-height: 0 !important;
   border: 0 !important;
 }
-%else
+%endif
+
+%ifdef XP_WIN
 toolbar[type="menubar"][autohide="true"] {
   -moz-binding: url("chrome://global/content/bindings/toolbar.xml#toolbar-menubar-autohide");
   overflow: hidden;