From 89263f03b422c87c5e2842707a38658253022d5a Mon Sep 17 00:00:00 2001
From: wpt-sync <wpt-sync@lists.mozilla.com>
Date: Tue, 5 Dec 2017 19:47:10 +0000
Subject: [PATCH] Fix race in wpt /wasm/wasm_local_iframe_test.html ()
 bugzilla-url: https://bugzilla-dev.allizom.org/show_bug.cgi?id=Bug 1383683
 gecko-commit: e219b2b152d795da623814d7aeae3a89b1d2726e
 gecko-integration-branch: central gecko-reviewers: bz

---
 wasm/wasm_local_iframe_test.html | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/wasm/wasm_local_iframe_test.html b/wasm/wasm_local_iframe_test.html
index 9ccebdc75394a1..0f4fbd0c7191ec 100644
--- a/wasm/wasm_local_iframe_test.html
+++ b/wasm/wasm_local_iframe_test.html
@@ -2,16 +2,18 @@
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="resources/load_wasm.js"></script>
-<iframe src="resources/frame.html" id="iframe"></iframe>
 <script>
-  promise_test(async function() {
-    var mod = await createWasmModule();
-    assert_true(mod instanceof WebAssembly.Module);
-    var ans = await new Promise((resolve, reject) => {
-      var iframe = document.getElementById("iframe").contentWindow;
-      iframe.postMessage(mod, '*');
-      window.addEventListener("message", (reply) => resolve(reply.data), false);
-    });
-    assert_equals(ans, 43);
-  }, "send wasm module to iframe");
+  function runTests(iframe) {
+      iframe = iframe.contentWindow;
+      promise_test(async function() {
+        var mod = await createWasmModule();
+        assert_true(mod instanceof WebAssembly.Module);
+        var ans = await new Promise((resolve, reject) => {
+          iframe.postMessage(mod, '*');
+          window.addEventListener("message", (reply) => resolve(reply.data), false);
+        });
+        assert_equals(ans, 43);
+      }, "send wasm module to iframe");
+  }
 </script>
+<iframe src="resources/frame.html" onload="runTests(this)"></iframe>