Add dump statements to help figure out random-orange bug 540980

layout/base/crashtests/143862-1-inner.html

@@ -3,11 +3,15 @@
 html { overflow: hidden; }
 </style>
 <script>
+dump("143862-1-inner.html: A\n");
 setTimeout(o, 100);
 function o()
 {
+  dump("143862-1-inner.html: B\n");
   document.open();
+  dump("143862-1-inner.html: C\n");
   parent.document.documentElement.removeAttribute("class");
+  dump("143862-1-inner.html: D\n");
   document.close();
 }
 </script>