From 5c29637bef20a1680260fddaf7c47d46939de8a0 Mon Sep 17 00:00:00 2001
From: Josh Matthews <josh@joshmatthews.net>
Date: Wed, 22 Mar 2017 17:53:52 -0400
Subject: [PATCH] Don't create a new XHR until the previous one is complete.

---
 tests/wpt/metadata/MANIFEST.json                           | 2 +-
 .../embedded-content/the-iframe-element/iframe_harness.js  | 7 ++++---
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 760a3f00a0b..8075e47ca0e 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -176328,7 +176328,7 @@
    "reftest"
   ],
   "html/semantics/embedded-content/the-iframe-element/iframe_harness.js": [
-   "c5db7a8f3c32f79a4e24d176cb95563a999240e5",
+   "2f22f494c69854a79af94ccf90215ece7bb4a130",
    "support"
   ],
   "html/semantics/embedded-content/the-iframe-element/iframe_javascript_url_01.htm": [
diff --git a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_harness.js b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_harness.js
index f4ef511d1de..2b43c54e2f2 100644
--- a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_harness.js
+++ b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_harness.js
@@ -1,15 +1,16 @@
 function get_test_results(id) {
     async_test(function(test) {
-        var timer = window.setInterval(test.step_func(loop), 100);
+        test.step_timeout(loop, 100);
         function loop() {
             var xhr = new XMLHttpRequest();
             xhr.open('GET', 'stash.py?id=' + id);
-            xhr.onreadystatechange = test.step_func(function() {
+            xhr.onload = test.step_func(function() {
                 assert_equals(xhr.status, 200);
                 if (xhr.responseText) {
                     assert_equals(xhr.responseText, "OK");
                     test.done();
-                    window.clearTimeout(timer);
+                } else {
+                    test.step_timeout(loop, 100);
                 }
             });
             xhr.send();