Bug 445004 followup: Use parent instead of top for tests. r=roc

content/base/test/bug298064-subframe.html

@@ -4,18 +4,18 @@
     <script>
       function test_func() {
         var bar = new Option();
-        top.is(bar.ownerDocument, document,
+        parent.is(bar.ownerDocument, document,
                   "Unexpected document for our new option");
         bar = new Image();
-        top.is(bar.ownerDocument, document,
+        parent.is(bar.ownerDocument, document,
                   "Unexpected document for our new image");
-        bar = new top.Option();
-        top.is(bar.ownerDocument, top.document,
-                  "Unexpected document for top new option");
-        bar = new top.Image();
-        top.is(bar.ownerDocument, top.document,
-                  "Unexpected document for top new image");
-        top.isnot(top.document, document, "Documents should be different");
+        bar = new parent.Option();
+        parent.is(bar.ownerDocument, parent.document,
+                  "Unexpected document for parent new option");
+        bar = new parent.Image();
+        parent.is(bar.ownerDocument, parent.document,
+                  "Unexpected document for parent new image");
+        parent.isnot(parent.document, document, "Documents should be different");
       }
     </script>
   </head>