Remove unnecessary 10ms setTimeout in loading-iframe-updates-axtree.html

This test didn't need to setTimeout, so lets speed it up by 10+ms.

TBR=estaab

Review URL: https://codereview.chromium.org/1312903016

git-svn-id: svn://svn.chromium.org/blink/trunk@201823 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/accessibility/loading-iframe-updates-axtree.html

@@ -42,7 +42,7 @@
     }
 
     window.addEventListener('load', function() {
-        setTimeout(runTest, 10);
+        runTest();
     }, false);
 
   </script>