From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 02:47:55 +0200
Subject: Adding upstream version 124.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 dom/tests/mochitest/whatwg/chrome.toml             |   3 +
 dom/tests/mochitest/whatwg/file_bug500328_1.html   |  51 ++
 dom/tests/mochitest/whatwg/file_bug500328_2.html   |  17 +
 .../whatwg/file_structuredCloneAndExposed.sjs      |  22 +
 dom/tests/mochitest/whatwg/mochitest.toml          | 122 ++++
 .../whatwg/postMessage_chrome_helper.html          |  49 ++
 .../whatwg/postMessage_closed_helper.html          |  26 +
 dom/tests/mochitest/whatwg/postMessage_hash.html   |  31 +
 dom/tests/mochitest/whatwg/postMessage_helper.html | 102 +++
 .../mochitest/whatwg/postMessage_idn_helper.html   |  41 ++
 .../whatwg/postMessage_joined_helper.html          |  85 +++
 .../whatwg/postMessage_joined_helper2.html         |  71 ++
 .../mochitest/whatwg/postMessage_onOther.html      | 109 +++
 .../whatwg/postMessage_origin_helper.xhtml         |  42 ++
 .../whatwg/postMessage_override_helper.html        |  37 +
 .../postMessage_structured_clone_helper.html       | 106 +++
 .../whatwg/postMessage_structured_clone_helper.js  |  62 ++
 .../mochitest/whatwg/postMessage_throw_helper.html |  24 +
 .../whatwg/postMessage_transfer_helper.html        |  15 +
 .../whatwg/postMessage_userpass_helper.html        |  34 +
 dom/tests/mochitest/whatwg/test_MessageEvent.html  | 102 +++
 .../whatwg/test_MessageEvent_dispatchToOther.html  |  59 ++
 dom/tests/mochitest/whatwg/test_bug477323.html     |  64 ++
 dom/tests/mochitest/whatwg/test_bug500328.html     | 769 +++++++++++++++++++++
 .../mochitest/whatwg/test_document_scripts.html    |  55 ++
 dom/tests/mochitest/whatwg/test_postMessage.html   | 161 +++++
 .../whatwg/test_postMessage_basehref.html          |  45 ++
 .../mochitest/whatwg/test_postMessage_chrome.html  | 114 +++
 .../mochitest/whatwg/test_postMessage_closed.html  |  77 +++
 .../mochitest/whatwg/test_postMessage_hash.html    |  44 ++
 .../mochitest/whatwg/test_postMessage_idn.xhtml    |  66 ++
 .../mochitest/whatwg/test_postMessage_joined.html  |  53 ++
 .../mochitest/whatwg/test_postMessage_onOther.html |  51 ++
 .../mochitest/whatwg/test_postMessage_origin.xhtml | 465 +++++++++++++
 .../whatwg/test_postMessage_override.html          |  47 ++
 .../whatwg/test_postMessage_special.xhtml          | 304 ++++++++
 .../whatwg/test_postMessage_structured_clone.html  |  70 ++
 .../mochitest/whatwg/test_postMessage_throw.html   |  74 ++
 .../whatwg/test_postMessage_transfer.html          |  61 ++
 .../whatwg/test_postMessage_userpass.html          |  46 ++
 .../whatwg/test_structuredCloneAndExposed.html     | 307 ++++++++
 41 files changed, 4083 insertions(+)
 create mode 100644 dom/tests/mochitest/whatwg/chrome.toml
 create mode 100644 dom/tests/mochitest/whatwg/file_bug500328_1.html
 create mode 100644 dom/tests/mochitest/whatwg/file_bug500328_2.html
 create mode 100644 dom/tests/mochitest/whatwg/file_structuredCloneAndExposed.sjs
 create mode 100644 dom/tests/mochitest/whatwg/mochitest.toml
 create mode 100644 dom/tests/mochitest/whatwg/postMessage_chrome_helper.html
 create mode 100644 dom/tests/mochitest/whatwg/postMessage_closed_helper.html
 create mode 100644 dom/tests/mochitest/whatwg/postMessage_hash.html
 create mode 100644 dom/tests/mochitest/whatwg/postMessage_helper.html
 create mode 100644 dom/tests/mochitest/whatwg/postMessage_idn_helper.html
 create mode 100644 dom/tests/mochitest/whatwg/postMessage_joined_helper.html
 create mode 100644 dom/tests/mochitest/whatwg/postMessage_joined_helper2.html
 create mode 100644 dom/tests/mochitest/whatwg/postMessage_onOther.html
 create mode 100644 dom/tests/mochitest/whatwg/postMessage_origin_helper.xhtml
 create mode 100644 dom/tests/mochitest/whatwg/postMessage_override_helper.html
 create mode 100644 dom/tests/mochitest/whatwg/postMessage_structured_clone_helper.html
 create mode 100644 dom/tests/mochitest/whatwg/postMessage_structured_clone_helper.js
 create mode 100644 dom/tests/mochitest/whatwg/postMessage_throw_helper.html
 create mode 100644 dom/tests/mochitest/whatwg/postMessage_transfer_helper.html
 create mode 100644 dom/tests/mochitest/whatwg/postMessage_userpass_helper.html
 create mode 100644 dom/tests/mochitest/whatwg/test_MessageEvent.html
 create mode 100644 dom/tests/mochitest/whatwg/test_MessageEvent_dispatchToOther.html
 create mode 100644 dom/tests/mochitest/whatwg/test_bug477323.html
 create mode 100644 dom/tests/mochitest/whatwg/test_bug500328.html
 create mode 100644 dom/tests/mochitest/whatwg/test_document_scripts.html
 create mode 100644 dom/tests/mochitest/whatwg/test_postMessage.html
 create mode 100644 dom/tests/mochitest/whatwg/test_postMessage_basehref.html
 create mode 100644 dom/tests/mochitest/whatwg/test_postMessage_chrome.html
 create mode 100644 dom/tests/mochitest/whatwg/test_postMessage_closed.html
 create mode 100644 dom/tests/mochitest/whatwg/test_postMessage_hash.html
 create mode 100644 dom/tests/mochitest/whatwg/test_postMessage_idn.xhtml
 create mode 100644 dom/tests/mochitest/whatwg/test_postMessage_joined.html
 create mode 100644 dom/tests/mochitest/whatwg/test_postMessage_onOther.html
 create mode 100644 dom/tests/mochitest/whatwg/test_postMessage_origin.xhtml
 create mode 100644 dom/tests/mochitest/whatwg/test_postMessage_override.html
 create mode 100644 dom/tests/mochitest/whatwg/test_postMessage_special.xhtml
 create mode 100644 dom/tests/mochitest/whatwg/test_postMessage_structured_clone.html
 create mode 100644 dom/tests/mochitest/whatwg/test_postMessage_throw.html
 create mode 100644 dom/tests/mochitest/whatwg/test_postMessage_transfer.html
 create mode 100644 dom/tests/mochitest/whatwg/test_postMessage_userpass.html
 create mode 100644 dom/tests/mochitest/whatwg/test_structuredCloneAndExposed.html

(limited to 'dom/tests/mochitest/whatwg')

diff --git a/dom/tests/mochitest/whatwg/chrome.toml b/dom/tests/mochitest/whatwg/chrome.toml
new file mode 100644
index 0000000000..9ec68ac282
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/chrome.toml
@@ -0,0 +1,3 @@
+[DEFAULT]
+
+["test_postMessage_chrome.html"]
diff --git a/dom/tests/mochitest/whatwg/file_bug500328_1.html b/dom/tests/mochitest/whatwg/file_bug500328_1.html
new file mode 100644
index 0000000000..941cb47c55
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/file_bug500328_1.html
@@ -0,0 +1,51 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+Inner frame for testing bug 500328.
+https://bugzilla.mozilla.org/show_bug.cgi?id=500328
+-->
+<head>
+<title>test 1</title>
+  <style>
+    a           { fill:blue; }
+    a:visited   { fill:purple; }
+  </style>
+</head>
+<body onload="load(event);" onpopstate="popstate(event);" onpageshow="pageshow(event);">
+<script type="application/javascript">
+  if (parent && parent.onChildScript)
+    parent.onChildScript(history.state);
+  if (opener && opener.onChildScript)
+    opener.onChildScript(history.state);
+
+  function load(e) {
+    if(parent && parent.onChildLoad)
+      parent.onChildLoad(e);
+    if(opener && opener.onChildLoad)
+      opener.onChildLoad(e);
+  }
+
+  function pageshow(e) {
+    if(parent && parent.onChildPageShow)
+      parent.onChildPageShow(e);
+    if(opener && opener.onChildPageShow)
+      opener.onChildPageShow(e);
+  }
+
+  function popstate(e) {
+    if(parent && parent.onChildLoad)
+      parent.onChildPopState(e);
+    if(opener && opener.onChildLoad)
+      opener.onChildPopState(e);
+  }
+
+  function navigateTo(loc) {
+    location = loc;
+  }
+
+</script>
+
+<a id="link-anchor1", href="#1">Link Anchor1</a>
+<a id="link-self" href="file_bug500328_1.html">Self</a>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/file_bug500328_2.html b/dom/tests/mochitest/whatwg/file_bug500328_2.html
new file mode 100644
index 0000000000..3ce66493dd
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/file_bug500328_2.html
@@ -0,0 +1,17 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+Inner frame for testing bug 500328.
+https://bugzilla.mozilla.org/show_bug.cgi?id=500328
+-->
+<head>
+</head>
+<body>
+<!--
+ Yes, this page is basically blank.  But no, about:blank wouldn't do as a
+ replacement, because we use this page to test that pushstate has correct
+ same-origin checks.
+-->
+file_bug500328_2.html
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/file_structuredCloneAndExposed.sjs b/dom/tests/mochitest/whatwg/file_structuredCloneAndExposed.sjs
new file mode 100644
index 0000000000..e352078e2a
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/file_structuredCloneAndExposed.sjs
@@ -0,0 +1,22 @@
+"use strict";
+
+function handleRequest(request, response) {
+  let query = new URLSearchParams(request.queryString);
+
+  response.setHeader("Content-Type", "application/javascript");
+
+  let content = `function installListeners(input, target) {
+    input.addEventListener("message", () => {
+      target.postMessage(true, { targetOrigin: "*" });
+    });
+    input.addEventListener("messageerror", () => {
+      target.postMessage(false, { targetOrigin: "*" });
+    });
+    target.postMessage("Inited", { targetOrigin: "*" });
+  }
+
+  ${query.get("additionalScript")}
+  `;
+
+  response.write(content);
+}
diff --git a/dom/tests/mochitest/whatwg/mochitest.toml b/dom/tests/mochitest/whatwg/mochitest.toml
new file mode 100644
index 0000000000..fd20629a9c
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/mochitest.toml
@@ -0,0 +1,122 @@
+[DEFAULT]
+support-files = [
+  "postMessage_chrome_helper.html",
+  "postMessage_closed_helper.html",
+  "postMessage_hash.html",
+  "postMessage_helper.html",
+  "postMessage_idn_helper.html",
+  "postMessage_joined_helper2.html",
+  "postMessage_joined_helper.html",
+  "postMessage_onOther.html",
+  "postMessage_origin_helper.xhtml",
+  "postMessage_override_helper.html",
+  "postMessage_structured_clone_helper.html",
+  "postMessage_structured_clone_helper.js",
+  "postMessage_throw_helper.html",
+  "postMessage_transfer_helper.html",
+  "postMessage_userpass_helper.html",
+]
+
+["test_MessageEvent.html"]
+
+["test_MessageEvent_dispatchToOther.html"]
+skip-if = [
+  "http3",
+  "http2",
+]
+
+["test_bug477323.html"]
+
+["test_bug500328.html"]
+skip-if = ["true"] # bug 696306
+support-files = [
+  "file_bug500328_1.html",
+  "file_bug500328_2.html",
+]
+
+["test_document_scripts.html"]
+
+["test_postMessage.html"]
+skip-if = [
+  "http3",
+  "http2",
+]
+
+["test_postMessage_basehref.html"]
+skip-if = [
+  "http3",
+  "http2",
+]
+
+["test_postMessage_closed.html"]
+skip-if = [
+  "os == 'android'", #bug 894914 - wrong data - got FAIL, expected message
+  "http3",
+  "http2",
+]
+
+["test_postMessage_hash.html"]
+skip-if = [
+  "http3",
+  "http2",
+]
+
+["test_postMessage_idn.xhtml"]
+skip-if = [
+  "http3",
+  "http2",
+]
+
+["test_postMessage_joined.html"]
+skip-if = [
+  "http3",
+  "http2",
+]
+
+["test_postMessage_onOther.html"]
+skip-if = [
+  "http3",
+  "http2",
+]
+
+["test_postMessage_origin.xhtml"]
+skip-if = [
+  "http3",
+  "http2",
+]
+
+["test_postMessage_override.html"]
+skip-if = [
+  "http3",
+  "http2",
+]
+
+["test_postMessage_special.xhtml"]
+skip-if = [
+  "http3",
+  "http2",
+]
+
+["test_postMessage_structured_clone.html"]
+skip-if = [
+  "http3",
+  "http2",
+]
+
+["test_postMessage_throw.html"]
+
+["test_postMessage_transfer.html"]
+skip-if = [
+  "http3",
+  "http2",
+]
+
+["test_postMessage_userpass.html"]
+skip-if = [
+  "http3",
+  "http2",
+]
+
+["test_structuredCloneAndExposed.html"]
+scheme = "https"
+support-files = ["file_structuredCloneAndExposed.sjs"]
diff --git a/dom/tests/mochitest/whatwg/postMessage_chrome_helper.html b/dom/tests/mochitest/whatwg/postMessage_chrome_helper.html
new file mode 100644
index 0000000000..eea07f538c
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/postMessage_chrome_helper.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>postMessage chrome message receiver</title>
+  <script type="application/javascript">
+    var gPrePath = "";
+
+    function receiveMessage(evt)
+    {
+      if (evt.data.substring(0,9) == "chrome://") {
+        gPrePath = evt.data;
+        respond("path-is-set");
+      } else {
+        // Content cannot post to chrome without privileges
+        try {
+          window.parent.postMessage("SHOULD NOT GET THIS!", "*");
+        }
+        catch (ex) {
+        }
+
+        var msg = "post-to-content-response";
+
+        if (evt.source !== null)
+          msg += " wrong-source(" + evt.source + ")";
+        if (!evt.isTrusted)
+          msg += " unexpected-untrusted-event";
+        if (evt.type !== "message")
+          msg += " wrong-type(" + evt.type + ")";
+        if (evt.origin !== gPrePath)
+          msg += " wrong-origin(" + evt.origin + ")";
+        if (evt.data !== "post-to-content")
+          msg += " wrong-message(" + evt.data + ")";
+
+        respond(msg);
+      }
+    }
+    
+    function respond(msg)
+    {
+      SpecialPowers.wrap(window).parent.postMessage(msg, "*");
+    }
+    
+    window.addEventListener("message", receiveMessage);
+  </script>
+</head>
+<body>
+<h1 id="domain">example.org</h1>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/postMessage_closed_helper.html b/dom/tests/mochitest/whatwg/postMessage_closed_helper.html
new file mode 100644
index 0000000000..984ed08e71
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/postMessage_closed_helper.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <title>postMessage closed page</title>
+  <script type="application/javascript">
+function receiveMessage(evt)
+{
+  evt.source.postMessage("FAIL", "*");
+}
+
+window.addEventListener("message", receiveMessage);
+
+function setup()
+{
+  var query = location.search.substring(1);
+
+  if (query == "opener")
+    window.opener.postMessage("message", "http://mochi.test:8888");
+}
+
+window.addEventListener("load", setup);
+  </script>
+</head>
+<body>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/postMessage_hash.html b/dom/tests/mochitest/whatwg/postMessage_hash.html
new file mode 100644
index 0000000000..a7225153be
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/postMessage_hash.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>Hashed kid for test_postMessage_hash.html</title>
+  <script type="application/javascript">
+function receiveMessage(evt)
+{
+  var response = "response-message";
+
+  if (window.location.href !== "http://mochi.test:8888/tests/dom/tests/mochitest/whatwg/postMessage_hash.html#hash")
+    response += " kid-at-wrong-uri(" + window.location.href + ")";
+
+  if (evt.origin !== "http://mochi.test:8888")
+    response += " wrong-origin(" + evt.origin + ")";
+  if (evt.source !== window.parent)
+    response += " wrong-source";
+  if (evt.data !== "from-parent")
+    response += " wrong-data(" + evt.data + ")";
+  if (evt.lastEventId !== "")
+    response += " wrong-lastEventId(" + evt.lastEventId + ")";
+
+  window.parent.postMessage(response, "http://mochi.test:8888");
+}
+
+window.addEventListener("message", receiveMessage);
+  </script>
+</head>
+<body>
+<p>Kid iframe</p>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/postMessage_helper.html b/dom/tests/mochitest/whatwg/postMessage_helper.html
new file mode 100644
index 0000000000..2d01214707
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/postMessage_helper.html
@@ -0,0 +1,102 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>postMessage message receiver</title>
+  <script type="application/javascript">
+    function $(id) { return document.getElementById(id); }
+
+    function setup()
+    {
+      var target = $("domain");
+      target.textContent = location.hostname + ":" + (location.port || 80);
+    }
+
+    function receiveMessage(evt)
+    {
+      var response = evt.data + "-response";
+
+      if (evt.lastEventId !== "")
+        response += " wrong-lastEventId(" + evt.lastEventId + ")";
+
+      if (evt.source !== window.parent)
+      {
+        response += " unexpected-source(" + evt.source + ")";
+        response += " window-parent-is(" + window.parent + ")";
+        response += " location(" + window.location.href + ")";
+      }
+
+      if (evt.type != "message")
+        response += " wrong-type(" + evt.type + ")";
+
+      var data = evt.data;
+      if (data == "post-to-other-same-domain")
+      {
+        receiveSame(evt, response);
+      }
+      else if (data == "post-to-other-cross-domain")
+      {
+        receiveCross(evt, response);
+      }
+      else
+      {
+        response += " unexpected-message-to(" + window.location.href + ")";
+        window.parent.postMessage(response, "http://mochi.test:8888");
+      }
+    }
+
+    function receiveSame(evt, response)
+    {
+      var source = evt.source;
+      try
+      {
+        if (evt.origin != "http://mochi.test:8888")
+          response += " unexpected-origin(" + evt.origin + ")";
+          
+        try
+        {
+          var threw = false;
+          var privateVariable = source.privateVariable;
+        }
+        catch (e)
+        {
+          threw = true;
+        }
+        if (threw || privateVariable !== window.parent.privateVariable)
+          response += " accessed-source!!!";
+  
+      }
+      finally
+      {
+        source.postMessage(response, evt.origin);
+      }
+    }
+
+    function receiveCross(evt, response)
+    {
+      var source = evt.source;
+      if (evt.origin != "http://mochi.test:8888")
+        response += " unexpected-origin(" + evt.origin + ")";
+        
+      try
+      {
+        var threw = false;
+        var privateVariable = source.privateVariable;
+      }
+      catch (e)
+      {
+        threw = true;
+      }
+      if (!threw || privateVariable !== undefined)
+        response += " accessed-source!!!";
+
+      source.postMessage(response, evt.origin);
+    }
+
+    window.addEventListener("load", setup);
+    window.addEventListener("message", receiveMessage);
+  </script>
+</head>
+<body>
+<h1 id="domain"></h1>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/postMessage_idn_helper.html b/dom/tests/mochitest/whatwg/postMessage_idn_helper.html
new file mode 100644
index 0000000000..b401fd9933
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/postMessage_idn_helper.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>postMessage IDN test page</title>
+  <script type="application/javascript">
+    function receiveMessage(evt)
+    {
+      var response = "idn-response";
+
+      if (!(evt instanceof MessageEvent))
+        response += " not-a-MessageEvent";
+      if (evt.origin !== "http://mochi.test:8888")
+        response += " wrong-sender-origin(" + evt.origin + ")";
+      if (evt.data !== "idn-message")
+        response += " wrong-data(" + evt.data + ")";
+      if (evt.lastEventId !== "")
+        response += " wrong-lastEventId(" + evt.lastEventId + ")";
+      if (evt.source !== window.parent)
+        response += " wrong-source";
+      if (evt.target !== window)
+        response += " wrong-target";
+      if (evt.type !== "message")
+        response += " wrong-type(" + evt.type + ")";
+
+      evt.source.postMessage(response, evt.origin);
+    }
+    window.addEventListener("message", receiveMessage);
+
+    function setup()
+    {
+      var target = document.getElementById("location");
+      target.textContent = location.hostname + ":" + (location.port || 80);
+    }
+
+    window.addEventListener("load", setup);
+  </script>
+</head>
+<body>
+<h1 id="location">No location!</h1>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/postMessage_joined_helper.html b/dom/tests/mochitest/whatwg/postMessage_joined_helper.html
new file mode 100644
index 0000000000..aa40909017
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/postMessage_joined_helper.html
@@ -0,0 +1,85 @@
+<!DOCTYPE html>
+<html>
+<!--
+http://sub1.test1.example.org/tests/dom/tests/mochitest/whatwg/postMessage_joined_helper.html
+-->
+<head>
+  <title>postMessage joined domains, inner frame</title>
+  <script type="application/javascript">
+    function receiveMessage(evt)
+    {
+      var response, target, providedOrigin;
+      var data = evt.data;
+      if (data === "subframe-test-finished")
+      {
+        target = window.parent;
+        providedOrigin = "http://mochi.test:8888";
+        response = "test-passed";
+      }
+      else if (data === "start-test")
+      {
+        target = window.frames.innermost;
+        providedOrigin = "http://example.org";
+        response = "start-test";
+      }
+      else
+      {
+        target = window.parent;
+        providedOrigin = "http://mochi.test:8888";
+        response = "not reached";
+      }
+
+      if (evt.lastEventId !== "")
+        response += " wrong-lastEventId(" + evt.lastEventId + ")";
+
+      if (evt.type !== "message")
+        response += " wrong-type(" + evt.type + ")";
+
+      if (evt.target !== window)
+      {
+        response += " wrong-target(" + evt.target + ")";
+        response += " location(" + window.location.href + ")";
+      }
+
+      var origin;
+      if (data == "subframe-test-finished")
+        origin = "http://example.org";
+      else if (data === "start-test")
+        origin = "http://mochi.test:8888";
+      else
+        origin = "unreached";
+
+      if (evt.origin !== origin)
+      {
+        response += " wrong-origin(" + evt.origin + ")";
+        response += " location(" + window.location.href + ")";
+      }
+
+      target.postMessage(response, providedOrigin);
+    }
+
+    function setup()
+    {
+      var oldDomain = document.domain;
+      var newDomain = "example.org";
+
+      document.domain = newDomain;
+
+      var target = document.getElementById("location");
+      target.textContent = "Location: " + oldDomain +
+                           ", effective domain: " + newDomain;
+
+      window.addEventListener("message", receiveMessage);
+    }
+
+    window.addEventListener("load", setup);
+  </script>
+</head>
+<body>
+<p id="location">No location!</p>
+
+<iframe src="http://example.org/tests/dom/tests/mochitest/whatwg/postMessage_joined_helper2.html"
+        name="innermost"></iframe>
+
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/postMessage_joined_helper2.html b/dom/tests/mochitest/whatwg/postMessage_joined_helper2.html
new file mode 100644
index 0000000000..0f6c063cc4
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/postMessage_joined_helper2.html
@@ -0,0 +1,71 @@
+<!DOCTYPE html>
+<html>
+<!--
+http://example.org/tests/dom/tests/mochitest/whatwg/postMessage_joined_helper2.html
+-->
+<head>
+  <title>postMessage joined domains, innermost frame</title>
+  <script type="application/javascript">
+    function receiveMessage(evt)
+    {
+      var response = "subframe-test-finished";
+
+      if (evt.origin !== "http://sub1.test1.example.org")
+      {
+        response += " wrong-origin(" + evt.origin + ")";
+        response += " location(" + window.location.href + ")";
+      }
+
+      if (evt.data !== "start-test")
+        response += " incorrect-subframe-data(" + evt.data + ")";
+      if (evt.type !== "message")
+        response += " wrong-type(" + evt.type + ")";
+      if (evt.target !== window)
+      {
+        response += " wrong-target(" + evt.target + ")";
+        response += " location(" + window.location.href + ")";
+      }
+
+      if (evt.source !== window.parent)
+      {
+        response += " unexpected-source(" + evt.source + ")";
+        response += " window-parent-is(" + window.parent + ")";
+        response += " location(" + window.location.href + ")";
+      }
+
+      // verify that document.domain was actually joined with this domain
+      try
+      {
+        var passed = evt.source.document.domain === document.domain;
+      }
+      catch (e)
+      {
+      }
+
+      if (!passed)
+        response += " expected-joined-domains";
+
+      window.parent.postMessage(response, "http://sub1.test1.example.org");
+    }
+    
+    function setup()
+    {
+      var oldDomain = document.domain;
+      var newDomain = "example.org"; // join with parent
+
+      document.domain = newDomain;
+
+      var target = document.getElementById("location");
+      target.textContent = "Location: " + oldDomain +
+                           ", effective domain: " + newDomain;
+
+      window.addEventListener("message", receiveMessage);
+    }
+
+    window.addEventListener("load", setup);
+  </script>
+</head>
+<body>
+<p id="location">No location!</p>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/postMessage_onOther.html b/dom/tests/mochitest/whatwg/postMessage_onOther.html
new file mode 100644
index 0000000000..9d60d9ef24
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/postMessage_onOther.html
@@ -0,0 +1,109 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>postMessage called through another frame</title>
+  <script type="application/javascript">
+    var PATH = "/tests/dom/tests/mochitest/whatwg/postMessage_onOther.html";
+
+    function receiveMessage(evt)
+    {
+      if (evt.lastEventId !== "")
+      {
+        fail("unexpected non-empty lastEventId");
+        return;
+      }
+
+      switch (window.location.href)
+      {
+        case "http://example.com" + PATH:
+          receiveTopDomain(evt);
+          break;
+
+        case "http://test1.example.com" + PATH:
+          receiveSubDomain(evt);
+          break;
+
+        default:
+          fail("unexpected location");
+      }
+    }
+
+    function fail(msg)
+    {
+      window.parent.postMessage("FAIL " + msg, "*");
+    }
+
+    // The parent frame sends "start-test" to the subdomain frame to start.
+    // The subdomain frame then sets document.domain to the top domain so that
+    // the top domain frame can access it.  It then sends a message to the top
+    // domain frame to tell it to do likewise; once that happens, the top domain
+    // frame can then call a method on the subdomain frame window, which will
+    // call a method *on the top domain window* to send a message to the parent
+    // window.  We thus expect to see an event whose source is the subdomain
+    // window -- *not* the top domain window.  Therefore, its .origin should be:
+    //
+    //   http://test1.example.com
+    //
+    // and not
+    //
+    //   http://example.com
+
+    function receiveSubDomain(evt)
+    {
+      if (evt.origin !== "http://mochi.test:8888")
+      {
+        fail("wrong top-domain origin: " + evt.origin);
+        return;
+      }
+      if (evt.data !== "start-test")
+      {
+        fail("wrong top-domain message: " + evt.origin);
+        return;
+      }
+
+      document.domain = "example.com";
+      window.parent.topDomainFrame.postMessage("domain-switch",
+                                               "http://example.com");
+    }
+    
+    function receiveTopDomain(evt)
+    {
+      if (evt.origin !== "http://test1.example.com")
+      {
+        fail("wrong subdomain origin: " + evt.origin);
+        return;
+      }
+      if (evt.data !== "domain-switch")
+      {
+        fail("wrong subdomain message: " + evt.origin);
+        return;
+      }
+      if (evt.source !== window.parent.subDomainFrame)
+      {
+        fail("wrong source on message from subdomain");
+        return;
+      }
+
+      document.domain = "example.com";
+      window.parent.subDomainFrame.testSiblingPostMessage();
+    }
+
+    function testSiblingPostMessage()
+    {
+      window.parent.postMessage("test-finished", "http://mochi.test:8888");
+    }
+
+    function setup()
+    {
+      var target = document.getElementById("location");
+      target.textContent = location.hostname + ":" + (location.port || 80);
+    }
+
+    window.addEventListener("message", receiveMessage);
+    window.addEventListener("load", setup);
+  </script>
+</head>
+<body>
+<h1 id="location">No location!</h1>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/postMessage_origin_helper.xhtml b/dom/tests/mochitest/whatwg/postMessage_origin_helper.xhtml
new file mode 100644
index 0000000000..955b2de83f
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/postMessage_origin_helper.xhtml
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <title>postMessage origin-testing helper page</title>
+  <script type="application/javascript"><![CDATA[
+function receiveMessage(evt)
+{
+  if (event.data === "PING") {
+    window.parent.postMessage("PONG", "*");
+    return;
+  }
+
+  var response = "PASS";
+
+  if (evt.origin !== "http://mochi.test:8888")
+    response += " wrong-origin(" + evt.origin + ")";
+  if (evt.source !== window.parent)
+    response += " wrong-source";
+  if (evt.data !== "PASS")
+    response += " wrong-data(" + evt.data + ")";
+
+  window.parent.postMessage(response, "http://mochi.test:8888");
+}
+
+window.addEventListener("message", receiveMessage);
+
+
+// Aids for identifying origins
+
+function setup()
+{
+  var target = document.getElementById("location");
+  target.textContent = location.hostname + ":" + (location.port || 80);
+}
+
+window.addEventListener("load", setup);
+  ]]></script>
+</head>
+<body>
+<h1 id="location">No location!</h1>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/postMessage_override_helper.html b/dom/tests/mochitest/whatwg/postMessage_override_helper.html
new file mode 100644
index 0000000000..901e3af7bb
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/postMessage_override_helper.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>Overriding postMessage and dispatchEvent bindings</title>
+  <script type="application/javascript">
+    window.postMessage = function (evt) {
+      window.parent.postMessage("FAIL overridden postMessage called", "*");
+    };
+
+    var count = 0;
+
+    function receiveMessage(evt) {
+      count++;
+      if (count == 2) {
+        window.dispatchEvent = function(evt) {
+          window.parent.postMessage("FAIL", "*");
+          throw "dispatchEvent threw";
+        };
+      }
+
+      window.parent.postMessage(evt.data, "http://mochi.test:8888");
+    }
+
+    function setup() {
+      var target = document.getElementById("location");
+      target.textContent = location.hostname + ":" + (location.port || 80);
+    }
+
+    window.addEventListener("message", receiveMessage);
+
+    window.addEventListener("load", setup);
+  </script>
+</head>
+<body>
+<h1 id="location">No location!</h1>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/postMessage_structured_clone_helper.html b/dom/tests/mochitest/whatwg/postMessage_structured_clone_helper.html
new file mode 100644
index 0000000000..2b6e9d1f46
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/postMessage_structured_clone_helper.html
@@ -0,0 +1,106 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>postMessage structured clone page</title>
+  <script type="application/javascript"
+          src="postMessage_structured_clone_helper.js"></script>
+  <script type="application/javascript">
+    var generator = getTestContent()
+
+    function isClone(a, b) {
+        window.dump("Object a: " + a + "\n");
+        window.dump("Object b: " + b + "\n");
+        var stack = [[a, b]];
+        var memory = new WeakMap();
+        var rmemory = new WeakMap();
+
+        while (stack.length) {
+            var pair = stack.pop();
+            var x = pair[0], y = pair[1];
+            if (typeof x !== "object" || x === null) {
+                // x is primitive.
+                if (x !== y) {
+                    window.dump("Primitives not equal!\n");
+                    return false;
+                }
+            } else if (x instanceof Date) {
+                if (x.getTime() == y.getTime())
+                    return true;
+                window.dump("Dates not equal!\n");
+                return false;
+            } else if (memory.has(x)) {
+                // x is an object we have seen before in a.
+                if (y !== memory.get(x)) {
+                    window.dump("Already seen!?\n");
+                    return false;
+                }
+                if (!(rmemory.get(y) == x)) {
+                    window.dump("Not equal??\n");
+                    return false;
+                }
+            } else {
+                // x is an object we have not seen before.
+                // Check that we have not seen y before either.
+                if (rmemory.has(y)) {
+                    // If we have seen y before, the only possible outcome
+                    // is that x and y are literally the same object.
+                    if (y == x)
+                        continue;
+                    window.dump("Already seen y!?\n");
+                    window.dump(y.toString() + "\n");
+                    return false;
+                }
+
+                // x and y must be of the same [[Class]].
+                var xcls = Object.prototype.toString.call(x);
+                var ycls = Object.prototype.toString.call(y);
+                if (xcls !== ycls) {
+                    window.dump("Failing on proto\n");
+                    return false;
+                }
+
+                // This function is only designed to check Objects and Arrays.
+                if (!(xcls === "[object Object]" || xcls === "[object Array]")) {
+                    window.dump("Not an object!\n");
+                    window.dump(xcls + "\n");
+                    return false;
+                }
+
+                // Compare objects.
+                var xk = Object.keys(x), yk = Object.keys(y);
+                if (xk.length !== yk.length) {
+                    window.dump("Length mismatch!\n");
+                    return false;
+                }
+                for (var i = 0; i < xk.length; i++) {
+                    // We must see the same property names in the same order.
+                    if (xk[i] !== yk[i]) {
+                        window.dump("wrong order\n");
+                        return false;
+                    }
+
+                    // Put the property values on the stack to compare later.
+                    stack.push([x[xk[i]], y[yk[i]]]);
+                }
+
+                // Record that we have seen this pair of objects.
+                memory.set(x, y);
+                rmemory.set(y, x);
+            }
+        }
+        return true;
+    }
+
+    function receiveMessage(evt)
+    {
+      if (isClone(evt.data, generator.next().value))
+        window.parent.postMessage("TEST-PASS", "*");
+      else
+        window.parent.postMessage("TEST-FAIL", "*");
+    }
+    window.addEventListener("message", receiveMessage);
+  </script>
+</head>
+<body>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/postMessage_structured_clone_helper.js b/dom/tests/mochitest/whatwg/postMessage_structured_clone_helper.js
new file mode 100644
index 0000000000..b457fd2d2f
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/postMessage_structured_clone_helper.js
@@ -0,0 +1,62 @@
+function* getTestContent() {
+  yield "hello";
+  yield 2 + 3;
+  yield 12;
+  yield null;
+  yield "complex" + "string";
+  yield new Object();
+  yield new Date(1306113544);
+  yield [1, 2, 3, 4, 5];
+  let obj = new Object();
+  obj.foo = 3;
+  obj.bar = "hi";
+  obj.baz = new Date(1306113544);
+  obj.boo = obj;
+  yield obj;
+
+  let recursiveobj = new Object();
+  recursiveobj.a = recursiveobj;
+  recursiveobj.foo = new Object();
+  recursiveobj.foo.bar = "bar";
+  recursiveobj.foo.backref = recursiveobj;
+  recursiveobj.foo.baz = 84;
+  recursiveobj.foo.backref2 = recursiveobj;
+  recursiveobj.bar = new Object();
+  recursiveobj.bar.foo = "foo";
+  recursiveobj.bar.backref = recursiveobj;
+  recursiveobj.bar.baz = new Date(1306113544);
+  recursiveobj.bar.backref2 = recursiveobj;
+  recursiveobj.expando = recursiveobj;
+  yield recursiveobj;
+
+  obj = new Object();
+  obj.expando1 = 1;
+  obj.foo = new Object();
+  obj.foo.bar = 2;
+  obj.bar = new Object();
+  obj.bar.foo = obj.foo;
+  obj.expando = new Object();
+  obj.expando.expando = new Object();
+  obj.expando.expando.obj = obj;
+  obj.expando2 = 4;
+  obj.baz = obj.expando.expando;
+  obj.blah = obj.bar;
+  obj.foo.baz = obj.blah;
+  obj.foo.blah = obj.blah;
+  yield obj;
+
+  let diamond = new Object();
+  obj = new Object();
+  obj.foo = "foo";
+  obj.bar = 92;
+  obj.backref = diamond;
+  diamond.ref1 = obj;
+  diamond.ref2 = obj;
+  yield diamond;
+
+  let doubleref = new Object();
+  obj = new Object();
+  doubleref.ref1 = obj;
+  doubleref.ref2 = obj;
+  yield doubleref;
+}
diff --git a/dom/tests/mochitest/whatwg/postMessage_throw_helper.html b/dom/tests/mochitest/whatwg/postMessage_throw_helper.html
new file mode 100644
index 0000000000..b1d3ddce7d
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/postMessage_throw_helper.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>postMessage throwing page</title>
+  <script type="application/javascript">
+    function receiveMessage(evt)
+    {
+      throw 17;
+    }
+    window.addEventListener("message", receiveMessage);
+
+    function setup()
+    {
+      var target = document.getElementById("location");
+      target.textContent = location.hostname + ":" + (location.port || 80);
+    }
+
+    window.addEventListener("load", setup);
+  </script>
+</head>
+<body>
+<h1 id="location">No location!</h1>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/postMessage_transfer_helper.html b/dom/tests/mochitest/whatwg/postMessage_transfer_helper.html
new file mode 100644
index 0000000000..03c4c1030b
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/postMessage_transfer_helper.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+<head><meta charset=utf-8>
+  <title>postMessage transferable tests helper</title>
+</head>
+<body>
+<script>
+
+onmessage = function(e) {
+  parent.postMessage(e.data, "*");
+};
+
+</script>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/postMessage_userpass_helper.html b/dom/tests/mochitest/whatwg/postMessage_userpass_helper.html
new file mode 100644
index 0000000000..762cf52f9f
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/postMessage_userpass_helper.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>Username/password page for postMessage tests</title>
+  <script type="application/javascript">
+
+function sendMessage(evt)
+{
+  var msg = "child-message";
+
+  if (evt.origin !== "http://mochi.test:8888")
+    msg += " wrong-origin(" + evt.origin + ")";
+  if (evt.data !== "parent-message")
+    msg += " wrong-data(" + evt.data + ")";
+  if (evt.lastEventId !== "")
+    msg += " wrong-lastEventId(" + evt.lastEventId + ")";
+  if (evt.source !== window.parent)
+    msg += " wrong-source";
+
+  // It would be good to guarantee that we've been opened with a userinfo of
+  // "bobhope:password", but Gecko elides that from the content-visible URL,
+  // and I can't find another way to actually detect this programmatically.
+
+  window.parent.postMessage(msg, "http://mochi.test:8888");
+}
+
+window.addEventListener("message", sendMessage);
+  </script>
+</head>
+<body>
+<p>Kid iframe</p>
+</body>
+</html>
+
diff --git a/dom/tests/mochitest/whatwg/test_MessageEvent.html b/dom/tests/mochitest/whatwg/test_MessageEvent.html
new file mode 100644
index 0000000000..41e1a7bcb4
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_MessageEvent.html
@@ -0,0 +1,102 @@
+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage
+-->
+<head>
+  <title>MessageEvent tests</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage">Mozilla Bug 387706</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  
+</div>
+
+<button id="target">target</button>
+
+<pre id="test">
+<script class="testbody" type="application/javascript">
+/** Test for Bug 387706 **/
+
+SimpleTest.waitForExplicitFinish();
+
+var data = "foobar";
+var origin = "http://cool.example.com";
+var bubbles = true, cancelable = true;
+var lastEventId = "lastEventId";
+
+var target;
+
+var count = 0;
+
+function sendMsg()
+{
+  try
+  {
+    var evt = new MessageEvent('message', {
+      bubbles, cancelable, data,
+      origin, lastEventId, source: window});
+    ok(evt instanceof MessageEvent, "I ordered a MessageEvent!");
+  
+    is(evt.data, data, "unexpected data");
+    is(evt.origin, origin, "unexpected origin");
+    is(evt.lastEventId, lastEventId, "unexpected lastEventId");
+  
+    is(evt.cancelable, cancelable, "wrong cancelable property");
+    is(evt.bubbles, bubbles, "wrong bubbling property");
+    is(evt.source, window, "wrong source");
+  
+    return target.dispatchEvent(evt);
+  }
+  catch (e)
+  {
+    ok(false, "exception thrown: " + e);
+    return false;
+  }
+}
+
+function recvMsg(evt)
+{
+  is(evt.data, data, "unexpected data");
+  is(evt.origin, origin, "unexpected origin");
+  is(evt.lastEventId, lastEventId, "unexpected lastEventId");
+
+  is(evt.cancelable, cancelable, "wrong cancelable property");
+  is(evt.bubbles, bubbles, "wrong bubbling property");
+  is(evt.source, window, "wrong source");
+
+  is(evt.target, target, "wrong target");
+
+  if (target == evt.currentTarget)
+  {
+    is(Event.AT_TARGET, evt.eventPhase, "this listener was on the target");
+  }
+  else
+  {
+    is(evt.currentTarget, document, "should have gotten this at the window");
+    is(Event.BUBBLING_PHASE, evt.eventPhase, "wrong phase");
+  }
+
+  count++;
+}
+
+function setup()
+{
+  target = $("target");
+  target.addEventListener("message", recvMsg);
+  document.addEventListener("message", recvMsg);
+  var res = sendMsg();
+  ok(res === true, "nothing canceled this");
+  is(count, 2, "listener not called twice");
+  SimpleTest.finish();
+}
+
+addLoadEvent(setup);
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_MessageEvent_dispatchToOther.html b/dom/tests/mochitest/whatwg/test_MessageEvent_dispatchToOther.html
new file mode 100644
index 0000000000..d5d2f4c454
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_MessageEvent_dispatchToOther.html
@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage
+-->
+<head>
+  <title>Dispatching MessageEvent across origins</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage">Mozilla Bug 387706</a>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+
+<iframe src="http://example.com/" name="otherDomain"></iframe>
+
+<pre id="test">
+<script class="testbody" type="application/javascript">
+/** Test for Bug 387706 **/
+
+SimpleTest.waitForExplicitFinish();
+
+function run()
+{
+  try
+  {
+    var msg = new MessageEvent('message', { bubbles: true, cancelable: true,
+                                            data: "foo", origin: "http://evil.com",
+                                            source: window });
+
+    try
+    {
+      var ex;
+      window.frames.otherDomain.dispatchEvent(msg);
+      ok(false, "should have thrown a security exception per HTML5");
+    }
+    catch (e)
+    {
+      ok(true, "correctly threw an exception (security exception, but " +
+               "what that entails isn't yet defined in the spec)");
+    }
+  }
+  catch (e)
+  {
+    ok(false, "threw exception during execution: " + e);
+  }
+  finally
+  {
+    SimpleTest.finish();
+  }
+}
+
+addLoadEvent(run);
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_bug477323.html b/dom/tests/mochitest/whatwg/test_bug477323.html
new file mode 100644
index 0000000000..66bad6288c
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_bug477323.html
@@ -0,0 +1,64 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>Dynamically assigned drag and drop handlers</title>
+  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <script src="/tests/SimpleTest/EventUtils.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body onload="start()">
+<script class="testbody" type="application/javascript">
+
+SimpleTest.waitForExplicitFinish();
+
+function start()
+{
+  var element = document.getElementById("draggable_img");
+  
+  var gotdragstart = false, gotdrag = false, 
+      gotdragenter = false, gotdragover = false, gotdragleave = false, 
+      gotdrop = false, gotdragend = false;
+  
+  element.ondragstart = function(event) {gotdragstart = true;}
+  element.ondrag = function(event) {gotdrag = true;}
+  element.ondragenter = function(event) {gotdragenter = true;}
+  element.ondragover = function(event) {gotdragover = true;}
+  element.ondragleave = function(event) {gotdragleave = true;}
+  element.ondrop = function(event) {gotdrop = true;}
+  element.ondragend = function(event) {gotdragend = true;}
+  
+  function dispatch(eventName)
+  {
+    var event = document.createEvent("DragEvent");
+    event.initDragEvent(eventName, true, true, window, 0, 5, 5, 5, 5,
+                        false, false, false, false, 0, null, null);
+    element.dispatchEvent(event);
+  }
+  
+  dispatch("dragstart");
+  dispatch("drag");
+  dispatch("dragenter");
+  dispatch("dragover");
+  dispatch("dragleave");
+  dispatch("drop");
+  dispatch("dragend");
+
+  ok(gotdragstart, "Got ondragstart event");
+  ok(gotdrag, "Got ondrag event");
+  ok(gotdragenter, "Got ondragenter event");
+  ok(gotdragover, "Got ondragover event");
+  ok(gotdragleave, "Got ondragleave event");
+  ok(gotdrop, "Got ondrop event");
+  ok(gotdragend, "Got ondragend event");
+  
+  SimpleTest.finish();
+}
+
+</script>
+
+<img src="data:image/png,%89PNG%0D%0A%1A%0A%00%00%00%0DIHDR%00%00%00%18%00%00%00%18%02%03%00%00%00%9D%19%D5k%00%00%00%04gAMA%00%00%B1%8F%0B%FCa%05%00%00%00%0CPLTE%FF%FF%FF%FF%FF%FF%F7%DC%13%00%00%00%03%80%01X%00%00%00%01tRNS%08N%3DPT%00%00%00%01bKGD%00%88%05%1DH%00%00%00%09pHYs%00%00%0B%11%00%00%0B%11%01%7Fd_%91%00%00%00%07tIME%07%D2%05%0C%14%0C%0D%D8%3F%1FQ%00%00%00%5CIDATx%9C%7D%8E%CB%09%C0%20%10D%07r%B7%20%2F%E9wV0%15h%EA%D9%12D4%BB%C1x%CC%5C%1E%0C%CC%07%C0%9C0%9Dd7()%C0A%D3%8D%E0%B8%10%1DiCHM%D0%AC%D2d%C3M%F1%B4%E7%FF%10%0BY%AC%25%93%CD%CBF%B5%B2%C0%3Alh%CD%AE%13%DF%A5%F7%E0%03byW%09A%B4%F3%E2%00%00%00%00IEND%AEB%60%82" 
+     draggable="true" id="draggable_img"/>
+
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_bug500328.html b/dom/tests/mochitest/whatwg/test_bug500328.html
new file mode 100644
index 0000000000..20b2c36761
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_bug500328.html
@@ -0,0 +1,769 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=500328
+-->
+<head>
+  <title>Test for Bug 500328</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=500328">Mozilla Bug 500328</a>
+<p id="display"></p>
+<div id="status"></div>
+<div id="content">
+  <iframe id="iframe"></iframe>
+  <iframe id="iframe2"></iframe>
+  <a id="link">link</a>
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 500328 **/
+
+SimpleTest.waitForExplicitFinish();
+
+var iframe = document.getElementById("iframe");
+var iframeCw = iframe.contentWindow;
+
+var iframe2 = document.getElementById("iframe2");
+var iframe2Cw = iframe2.contentWindow;
+
+const unvisitedColor = "rgb(0, 0, 238)";
+const visitedColor = "rgb(85, 26, 139)";
+
+var gCallbackOnIframeLoad = false;
+var gCallbackOnIframePageShow = false;
+var gCallbackOnPopState = false;
+var gNumPopStates = 0;
+var gLastPopStateEvent;
+var gLastScriptHistoryState;
+
+var gGen;
+
+function statusMsg(msg) {
+  var msgElem = document.createElement("p");
+  msgElem.appendChild(document.createTextNode(msg));
+
+  document.getElementById("status").appendChild(msgElem);
+}
+
+function longWait() {
+  function hitEventLoop(times, func) {
+    if (times > 0) {
+      setTimeout(hitEventLoop, 0, times - 1, func);
+    } else {
+      setTimeout(func, 0);
+    }
+  }
+  hitEventLoop(100, function() { gGen.next(); });
+}
+
+function shortWait() {
+  setTimeout(function() { gGen.next(); }, 0);
+}
+
+function onChildPopState(e) {
+  gNumPopStates++;
+  gLastPopStateEvent = e;
+  if (gCallbackOnPopState) {
+    statusMsg("Popstate(" + JSON.stringify(e.state) + ").  Calling gGen.next().");
+    gCallbackOnPopState = false;
+    gGen.next();
+  }
+  else {
+    statusMsg("Popstate(" + JSON.stringify(e.state) + ").  NOT calling gGen.next().");
+  }
+}
+
+function onChildScript(state) {
+  gLastScriptHistoryState = state;
+}
+
+function getURLFromEvent(e) {
+  try {
+    var target = e.target;
+    if ("contentWindow" in target) {
+      return target.contentWindow.location.toString();
+    }
+    if ("ownerDocument" in target && target.ownerDocument) {
+      return target.ownerDocument.location.toString();
+    }
+    if ("location" in target) {
+      return target.location.toString();
+    }
+    return target.toString();
+  }
+  catch(ex) {
+    return "<cross-site object>";
+  }
+}
+
+function onChildLoad(e) {
+  if(gCallbackOnIframeLoad) {
+    statusMsg("Got load for " + getURLFromEvent(e) + ".  About to call gGen.next().");
+    gCallbackOnIframeLoad = false;
+    gGen.next();
+  }
+  else {
+    statusMsg("Got load for " + getURLFromEvent(e) + ", but not calling gGen.next() because gCallbackOnIframeLoad was false.");
+  }
+}
+
+function onChildPageShow(e) {
+  if(gCallbackOnIframePageShow) {
+    statusMsg("Got pageshow for " + getURLFromEvent(e) + ".  About to call gGen.next().");
+    gCallbackOnIframePageShow = false;
+    SimpleTest.executeSoon(function() { gGen.next(); });
+  }
+  else {
+    statusMsg("Got pageshow for " + getURLFromEvent(e) + ", but not calling gGen.next() because gCallbackOnIframePageShow was false.");
+  }
+}
+
+function enableChildLoadCallback() {
+  gCallbackOnIframeLoad = true;
+}
+
+function enableChildPageShowCallback() {
+  gCallbackOnIframePageShow = true;
+}
+
+function enableChildPopStateCallback() {
+  gCallbackOnPopState = true;
+}
+
+function clearPopStateCounter() {
+  gNumPopStates = 0;
+}
+
+function noPopStateExpected(msg) {
+  is(gNumPopStates, 0, msg);
+
+  // Even if there's an error, set gNumPopStates to 0 so other tests don't
+  // fail.
+  gNumPopStates = 0;
+}
+
+function popstateExpected(msg) {
+  is(gNumPopStates, 1, msg);
+  gNumPopStates = 0;
+}
+
+function getColor(elem) {
+  var utils = SpecialPowers.getDOMWindowUtils(document.defaultView);
+  return utils.getVisitedDependentComputedStyle(elem, "", "color");
+}
+
+function getSHistory(theWindow)
+{
+  const Ci = SpecialPowers.Ci;
+  var sh = SpecialPowers.wrap(theWindow).docShell
+                        .QueryInterface(Ci.nsIWebNavigation)
+                        .sessionHistory;
+  if (!sh || sh == null)
+    throw("Couldn't get shistory for window!");
+
+  return sh;
+}
+
+function getSHTitle(sh, offset)
+{
+  if (!offset)
+    offset = 0;
+
+  // False instructs the SHistory not to modify its current index.
+  return sh.legacySHistory.getEntryAtIndex(sh.index + offset).title;
+}
+
+// Tests that win's location ends with str
+function locationEndsWith(win, str) {
+  var exp = new RegExp(str + "$");
+  ok(win.location.toString().match(exp),
+     "Wrong window location.  Expected it to end with " +
+     str + ", but actuall was " + win.location);
+}
+
+function expectException(func, msg) {
+  var failed = false;
+  try {
+    func();
+  } catch(ex) {
+    failed = true;
+  }
+
+  ok(failed, msg + " succeeded, but should have failed.");
+}
+
+function* runTest() {
+  // We can't enable universal XPConnect privleges in this function, because
+  // test 5 needs to be running at normal privleges in order to test the
+  // same-origin policy.
+
+  /**
+   * PRELIMINARY:
+   *  1. Clear the popstate counter
+   */
+
+  clearPopStateCounter();
+
+  // The URL of file_bug500328_1.html on http://localhost:8888
+  var innerLoc;
+
+  // Now we can start the tests
+
+  /**
+   * TEST 1 tests basic pushState functionality
+   */
+  enableChildLoadCallback();
+  iframeCw.location = "file_bug500328_1.html";
+  yield undefined;
+  innerLoc = iframeCw.location.toString();
+  // No popstate during initial load.
+  shortWait();
+  yield undefined;
+  noPopStateExpected("No initial popstate.");
+  is(JSON.stringify(gLastScriptHistoryState), "null", "null initial state.");
+  statusMsg("Awake after first load.");
+
+  // Make sure that the pushstate below doesn't trigger a hashchange.
+  iframeCw.onhashchange = function() {
+    ok(false, "Pushstate shouldn't trigger a hashchange.");
+  };
+
+  var testObj1 = 42;
+  var testObj2 = { x: 4.2 };
+  iframeCw.history.pushState(testObj1, "test 1");
+  is(JSON.stringify(iframeCw.history.state), JSON.stringify(testObj1),
+     "correct state after pushState");
+  is(iframeCw.location.search, "",
+     "First pushstate should leave us where we were.");
+
+  iframeCw.history.pushState(testObj2, "test 1#foo", "?test1#foo");
+  is(JSON.stringify(iframeCw.history.state), JSON.stringify(testObj2),
+     "correct state after pushState");
+  isnot(iframeCw.history.state, testObj2,
+     "correct state object identity after pushState");
+  is(iframeCw.location.search, "?test1",
+     "Second pushstate should push us to '?test1'.");
+  is(iframeCw.location.hash, "#foo",
+     "Second pushstate should push us to '#foo'");
+  shortWait();
+  yield undefined;
+
+  // Let the hashchange event fire, if it's going to.
+  longWait();
+  yield undefined;
+  iframeCw.onhashchange = null;
+
+  statusMsg("About to go back to page 1.");
+  // We don't have to yield here because this back() and the resulting popstate
+  // are completely synchronous.  In fact, if we did yield, JS would throw an
+  // error because we'd be calling gGen.next from within gGen.next.
+  iframeCw.history.back();
+
+  statusMsg("Awake after going back to page 1.");
+  popstateExpected("Going back to page 1 should trigger a popstate.");
+  is(gLastPopStateEvent.isTrusted, true, 'Popstate event should be trusted.');
+  is(JSON.stringify(gLastPopStateEvent.state), JSON.stringify(testObj1),
+     "Wrong state object popped after going back to page 1.");
+  ok(gLastPopStateEvent.state === iframeCw.history.state,
+     "Wrong state object in document after going back to page 1.");
+  ok(iframeCw.location.toString().match(/file_bug500328_1.html$/),
+      "Going back to page 1 hould take us to original page.");
+
+  iframeCw.history.back();
+  popstateExpected("Going back to page 0 should trigger a popstate.");
+  is(gLastPopStateEvent.state, null,
+     "Going back to page 0 should pop a null state.");
+  is(iframeCw.history.state, null,
+     "Going back to page 0 should pop a null state.");
+  is(iframeCw.location.search, "",
+     "Going back to page 0 should clear the querystring.");
+
+  iframeCw.history.forward();
+  popstateExpected("Going forward to page 1 should trigger a popstate.");
+  is(JSON.stringify(gLastPopStateEvent.state), JSON.stringify(testObj1),
+      "Wrong state object popped after going forward to page 1.");
+  is(gLastPopStateEvent.state, iframeCw.history.state,
+     "Wrong state object in document after going forward to page 1.");
+  ok(iframeCw.location.toString().match(/file_bug500328_1.html$/),
+      "Going forward to page 1 should leave us at original page.");
+
+  statusMsg("About to go forward to page 2.");
+  iframeCw.history.forward();
+  statusMsg("Awake after going forward to page 2.");
+  popstateExpected("Going forward to page 2 should trigger a popstate.");
+  is(JSON.stringify(gLastPopStateEvent.state), JSON.stringify(testObj2),
+     "Wrong state object popped after going forward to page 2.");
+  is(iframeCw.history.state, gLastPopStateEvent.state,
+     "Wrong state object in document after going forward to page 2.");
+  ok(iframeCw.location.toString().match(/file_bug500328_1.html\?test1#foo$/),
+     "Going forward to page 2 took us to " + iframeCw.location.toString());
+
+  statusMsg("About to reload page 2.");
+  iframeCw.location.reload();
+  enableChildLoadCallback();
+  yield undefined;
+  statusMsg("Awake after reloading page 2.");
+  noPopStateExpected("Reloading page 2 should not trigger popstate.");
+  is(JSON.stringify(iframeCw.history.state), JSON.stringify(testObj2),
+     "Wrong state object after reloading page 2.");
+  is(JSON.stringify(gLastScriptHistoryState), JSON.stringify(testObj2),
+     "Wrong state object while reloading page 2.");
+  ok(iframeCw.location.toString().match(/file_bug500328_1.html\?test1#foo$/),
+     "Reloading page 2 took us to " + iframeCw.location.toString());
+
+  // The iframe's current location is file_bug500328_1.html?test1#foo.
+  // Clicking link1 should take us to file_bug500328_1.html?test1#1.
+
+  enableChildPopStateCallback();
+  sendMouseEvent({type:'click'}, 'link-anchor1', iframeCw);
+  yield undefined;
+  popstateExpected("Clicking on link-anchor1 should trigger a popstate.");
+  is(iframeCw.location.search, "?test1",
+      "search should be ?test1 after clicking link.");
+  is(iframeCw.location.hash, "#1",
+      "hash should be #1 after clicking link.");
+  is(iframeCw.history.state, null,
+     "Wrong state object in document after clicking link to hash '#1'.");
+
+  /*
+   * Reload file_bug500328_1.html; we're now going to test that link hrefs
+   * and colors are updated correctly on push/popstates.
+   */
+
+  iframe.onload = onChildLoad;
+  enableChildLoadCallback();
+  iframeCw.location = "about:blank";
+  yield undefined;
+  enableChildLoadCallback();
+  iframeCw.location = "file_bug500328_1.html";
+  yield undefined;
+  noPopStateExpected("No popstate after re-loading file_bug500328_1.html");
+  statusMsg("Done loading file_bug500328_1.html for the second time.");
+
+  var ifLink = iframeCw.document.getElementById("link-anchor1");
+  var rand = Date.now() + "-" + Math.random();
+  ifLink.href = rand;
+
+  // Poll the document until the link has the correct color, or this test times
+  // out.  Unfortunately I can't come up with a more elegant way to do this.
+  // We could listen to MozAfterPaint, but that doesn't guarantee that we'll
+  // observe the new color.
+  while (getColor(ifLink) != unvisitedColor) {
+    // Dump so something shows up in the mochitest logs if we spin here.
+    dump("ifLink has wrong initial color.  Spinning...\n");
+    setTimeout(function() { gGen.next(); }, 0);
+    yield undefined;
+  }
+
+  // Navigate iframe2 to dir/${rand}
+  iframe2.onload = onChildLoad;
+  enableChildLoadCallback();
+  iframe2Cw.location = "mytestdir/" + rand;
+  yield undefined;
+
+  // PushState the iframe into the mytestdir directory.  This should cause
+  // ifLink to turn purple, since we just visited mytestdir/${rand} in iframe2.
+  iframeCw.history.pushState(null, "foo", "mytestdir/foo");
+
+  // Check that the link's color is now visitedColor
+  while (getColor(ifLink) != visitedColor) {
+    dump("ifLink has wrong color after pushstate.  Spinning...\n");
+    setTimeout(function() { gGen.next(); }, 0);
+    yield undefined;
+  }
+
+  ok(ifLink.href.match("mytestdir\\/" + rand + "$"),
+     "inner frame's link should end with 'mytestdir/${rand}'");
+
+  // Navigate out of the mytestdir directory.  This should cause ifLink to turn
+  // blue again.
+  iframeCw.history.pushState(null, "bar", "../file_bug500328_1.html");
+
+  // Check that the link's color is back to the unvisited color.
+  while (getColor(ifLink) != unvisitedColor) {
+    dump("ifLink has wrong color after pushstating out of dir.  Spinning...\n");
+    setTimeout(function() { gGen.next(); }, 0);
+    yield undefined;
+  }
+
+  ok(!ifLink.href.match("mytestdir"),
+     "inner frame's link shouldn't contain 'mytestdir'.");
+
+  /*
+   * TEST 2 tests that pushstate's same-origin checks are correct.
+   */
+  var filename = 'file_bug500328_2.html';
+  var dirname = document.location.pathname.replace(/[^\/]*$/, '');
+  statusMsg("Dirname is: " + dirname);
+  iframeCw.location = filename;
+  iframe.onload = onChildLoad;
+  enableChildLoadCallback();
+  yield undefined;
+
+  // This function tries to pushstate and replacestate to the given URL and
+  // fails the test if the calls succeed.
+  var tryBadPushAndReplaceState = function(url) {
+    // XXX ex should be a SECURITY_ERR, not a plain Error.
+
+    var hist = iframeCw.history;
+    var url2 = url + dirname + filename;
+
+    expectException(function() { hist.pushState({}, "foo", url); },
+                    'pushState to ' + url);
+
+    expectException(function() { hist.pushState({}, "foo", url2); },
+                    'pushState to ' + url2);
+
+    expectException(function() { hist.replaceState({}, "foo", url); },
+                    'replaceState to ' + url);
+
+    expectException(function() { hist.replaceState({}, "foo", url2); },
+                    'replaceState to ' + url2);
+  }
+
+  // We're currently at http://example.com/[dirname]/[filename]
+  tryBadPushAndReplaceState("https://mochi.test:8888");
+  tryBadPushAndReplaceState("http://foo.mochitest:8888");
+  tryBadPushAndReplaceState("http://mochi.test:1234");
+  tryBadPushAndReplaceState("http://mochi.test.a:8888");
+  tryBadPushAndReplaceState("http://mochi.tes:8888");
+  tryBadPushAndReplaceState("http://mmochi.test:8888");
+  tryBadPushAndReplaceState("http://me@mochi.test:8888");
+
+  /**
+   * TEST 3 tests that the session history entries' titles are properly sync'ed
+   * after push/pop states.
+   *
+   * We have to run this test in a popup rather than an iframe because only the
+   * root docshell has a session history object.
+   */
+  statusMsg("About to open popup.");
+  var popup = window.open("file_bug500328_1.html", "popup0",
+                          "height=200,width=200,location=yes," +
+                          "menubar=yes,status=yes,toolbar=yes,dependent=yes");
+
+  enableChildLoadCallback();
+  var shistory = getSHistory(popup);
+  yield undefined;
+  shortWait();
+  yield undefined;
+  noPopStateExpected("Shouldn't get popstate after opening window.");
+
+  popup.history.pushState(null, "title 0");
+  ok(SpecialPowers.isBackButtonEnabled(popup),
+     "Back button was not enabled after initial pushstate.");
+
+  popup.document.title = "title 1";
+
+  // Yield to the event loop so listeners will be notified of the title change
+  // and so that the hash change we trigger below generates a new session
+  // history entry.
+  shortWait();
+  yield undefined;
+
+  // Check that the current session history entry's title has been updated to
+  // reflect the new document title.
+  is(getSHTitle(shistory), "title 1", "SHEntry title test 1");
+
+  // Change the page's hash to #1, which will trigger a popstate event.
+  // We don't have to wait, because this happens synchronously.
+  popup.location.hash = "#1";
+  popstateExpected("Didn't get popstate after changing hash.");
+
+  popup.document.title = "title 2";
+
+  // Yield so listeners will be notified of the title change we just performed.
+  shortWait();
+  yield undefined;
+
+  is(getSHTitle(shistory), "title 2", "SHEntry title test 2");
+
+  // Go back.  Happens synchronously.  We should get a popstate.
+  statusMsg("About to go back.");
+  popup.history.go(-1);
+  popstateExpected("Didn't get a popstate after going back.");
+
+  // Even though we went back, we expect the SHEntry title to remain the same
+  // because the document didn't change.
+  is(getSHTitle(shistory), "title 2", "SHEntry title test 3");
+
+  popup.document.title = "Changed 1";
+  shortWait();
+  yield undefined;
+
+  // This check is really a test of bug 509055.
+  is(getSHTitle(shistory), "Changed 1", "SHEntry title test 4");
+
+  popup.close();
+
+  /**
+   * TEST 4 tests replaceState and that we don't get double popstates on
+   * window.open.  It also stress-tests the system and its interaction with
+   * bfcache by making many push/replace state calls.
+   */
+  popup = window.open("file_bug500328_1.html", "popup1",
+                      "height=200,width=200,location=yes," +
+                      "menubar=yes,status=yes,toolbar=yes,dependent=yes");
+
+  // The initial about:blank load into the new window shouldn't result in us
+  // seeing a popstate.  Once file_bug500328_1.html is loaded, it'll overwrite
+  // popup.onpopstate, and this assertion won't fire for that popstate and
+  // others after.
+  //
+  // If we fired the popstate event asynchronously, we'd expect this assert to
+  // fire.
+  popup.onpopstate = function() {
+    ok(false, "Initial load of popup shouldn't give us a popstate.");
+  };
+
+  shistory = getSHistory(popup);
+
+  enableChildLoadCallback();
+  yield undefined;
+  statusMsg("Awake after loading content into popup.");
+
+  popup.history.replaceState({n:1, ok:true}, "state 1", "good1.html");
+  locationEndsWith(popup, "good1.html");
+
+  // Even though we replaceState with title "state 1", the title should remain
+  // "test 1" because we ignore the title argument in push/replaceState.
+  // See bug 544535.
+  is(getSHTitle(shistory), "test 1", "SHEntry title 'state 1'");
+
+  // Flush the event loop so our next load creates a new session history entry.
+  shortWait();
+  yield undefined;
+
+  enableChildLoadCallback();
+  popup.location = "file_bug500328_1.html";
+  yield undefined;
+
+  // Flush the event loop so nsDocShell::OnNewURI runs and our load is recorded
+  // properly.
+  shortWait();
+  yield undefined;
+
+  // Now go back and make sure everything is as it should be.
+  enableChildPageShowCallback();
+  popup.history.back();
+  yield undefined;
+  // Flush the event loop so the document's location is updated and any
+  // popstates fire.
+  shortWait();
+  yield undefined;
+  noPopStateExpected("no popstate during initial load");
+
+  locationEndsWith(popup, "good1.html");
+  is(JSON.stringify(popup.history.state), '{"n":1,"ok":true}',
+     "Wrong state popped after going back to initial state.");
+
+  // We're back at state 0, which was replaceState-ed to state1.html.  Let's do
+  // some push/pop/replaces to make sure everything works OK when we involve
+  // large numbers of SHEntries.
+  for(var i = 2; i <= 30; i++) {
+    if (i % 3 == 0) {
+      popup.history.pushState({n:i, ok:true}, "state " + i, "good" + i + ".html");
+    }
+    else {
+      popup.history.pushState({n:i}, "state " + i, "state" + i + ".html");
+      for(var j = 0; j < i % 4; j++) {
+        popup.history.replaceState({n:i, nn:j}, "state " + i + ", " + j);
+      }
+      popup.history.replaceState({n:i, ok:true}, "state " + i, "good" + i + ".html");
+    }
+  }
+
+  for(var i = 29; i >= 1; i--) {
+    popup.history.back();
+    popstateExpected("Didn't get a popstate on iteration " + i);
+    locationEndsWith(popup, "good" + i + ".html");
+    is(gLastPopStateEvent.state.n, i, "Bad counter on last popstate event.");
+    ok(gLastPopStateEvent.state.ok,
+       "Last popstate event should have 'ok' set to true.");
+  }
+
+  popup.close();
+
+  /**
+   * TEST 5 tests misc security features and implementation details of
+   * Push/ReplaceState
+   */
+
+  /*
+   * Test that we can't push/replace an object with a large (over 640k
+   * characters) JSON representation.
+   */
+
+  // (In case you're curious, this loop generates an object which serializes to
+  // 694581 characters.)
+  var bigObject = new Object();
+  for(var i = 0; i < 51200; i++) {
+    bigObject[i] = i;
+  }
+  // statusMsg("Big object has size " + JSON.stringify(bigObject).length);
+
+  // We shouldn't be able to pushstate this large object, due to space
+  // constraints.
+  expectException(
+    function() { iframeCw.history.pushState(bigObject, "foo"); },
+    "pushState-ing large object");
+
+  expectException(
+    function() { iframeCw.history.replaceState(bigObject, "foo"); },
+    "replaceState-ing large object");
+
+  /*
+   * Make sure we can't push/replace state on an iframe of a different origin.
+   * This will work if this function has requested Universal XPConnect
+   * privileges, so any code which needs those privileges can't be in this
+   * function.
+   */
+  enableChildLoadCallback();
+  iframeCw.location = "http://example.com";
+  iframe.onload = onChildLoad;
+  yield undefined;
+  iframe.onload = null;
+
+  expectException(
+    function() { iframeCw.history.pushState({}, "foo"); },
+    "pushState-ing in a different origin");
+
+  expectException(
+    function() { iframeCw.history.replaceState({}, "foo"); },
+    "replaceState-ing in a different origin");
+
+  /*
+   * If we do the following:
+   *   * Start at page A.
+   *   * PushState to page B.
+   *   * Refresh.  The server responds with a 404
+   *   * Go back.
+   * Then at the end, page A should be displayed, not the 404 page.
+   */
+  enableChildLoadCallback();
+  iframe.onload = onChildLoad;
+  iframeCw.location = "about:blank";
+  yield undefined;
+  iframe.onload = null;
+
+  enableChildLoadCallback();
+  // navigate to http://mochi.test:8888/[...]/file_bug500328_1.html
+  iframeCw.location = innerLoc;
+  yield undefined;
+
+  // PushState to a URL which doesn't exist
+  iframeCw.history.pushState({}, "", rand);
+
+  // Refresh.  We'll end up a 404 page.
+  iframe.onload = onChildLoad;
+  enableChildLoadCallback();
+  iframeCw.location.reload(true);
+  yield undefined;
+  iframe.onload = null;
+
+  // Since the last page was a 404, going back should actually show the
+  // contents of the old page, instead of persisting the contents of the 404
+  // page.
+  enableChildPageShowCallback();
+  iframeCw.history.back();
+  yield undefined;
+
+  // Make sure that we're actually showing the contents of
+  // file_bug500328_1.html, as opposed to the 404 page.
+  var identifierElem = iframeCw.document.getElementById("link-anchor1");
+  ok(identifierElem != undefined && identifierElem != null,
+     "iframe didn't contain file_bug500328_1.html's contents.");
+
+  /**
+   * TEST 6 tests that the referrer is set properly after push/replace states.
+   */
+
+  /*
+   * First, a simple test:
+   *   * Load file_bug500328_1.html into iframe
+   *   * PushState to newpage1.html#foo
+   *   * Instruct the iframe to load file_bug500328_1.html into itself.
+   * The referer should be newpage1.html, without the hash.
+   *
+   * This also tests that we can call pushState from within the onload handler.
+   */
+  enableChildLoadCallback();
+  iframeCw.location = "file_bug500328_1.html";
+  yield undefined;
+
+  // Run within the onload handler.  This should work without issue.
+  iframeCw.history.pushState(null, "", "newpage1.html");
+
+  // iframeCw.navigateTo() causes the iframe to set its location on our
+  // behalf.  We can't just set its location ourselves, because then *we*
+  // become the referrer.
+  enableChildLoadCallback();
+  iframeCw.navigateTo("file_bug500328_1.html");
+  yield undefined;
+
+  ok(iframeCw.document.referrer.toString().match(/newpage1.html$/),
+     "Wrong referrer after pushState.  Expected newpage1.html, but was " +
+     iframeCw.document.referrer);
+
+  /*
+   * We're back at file_bug500328_1.html.  Now do the following:
+   *   * replaceState to newpage2.html#foo
+   *   * Click a link back to file_bug500328_1.html
+   * The referrer should be newpage2.html, without the hash.
+   */
+  iframeCw.history.replaceState(null, null, "newpage2.html#foo");
+  enableChildLoadCallback();
+  sendMouseEvent({type:'click'}, 'link-self', iframeCw);
+  yield undefined;
+
+  ok(iframeCw.document.referrer.toString().match(/newpage2.html$/),
+     "Wrong referrer after replaceState.  Expected newpage2.html, but was " +
+     iframeCw.document.referrer);
+
+  /*
+   * Set up a cycle with the popstate event to make sure it's properly
+   * collected.
+   */
+  var evt = document.createEvent("popstateevent");
+  evt.initEvent("foo", false, false, evt);
+
+  /* */
+  SimpleTest.finish();
+  statusMsg("********** Finished tests ***********");
+  while(true)
+  {
+    yield undefined;
+
+    // I don't think this will actually make the mochitest fail, but there's
+    // not much we can do about this.  Realistically, though, regressions are
+    // not likely to fire extra events -- this trap is here mostly to catch
+    // errors made while wriring tests.
+    ok(false, "Got extra event!");
+  }
+
+  /*
+  statusMsg("XXXXXXXXXXXXXX");
+  while(true) {
+    yield undefined;
+    statusMsg("Woken up.");
+  }
+  */
+}
+
+// Important: Wait to start the tests until the page has loaded.  Otherwise,
+// the test will occasionally fail when it begins running before the iframes
+// have finished their initial load of about:blank.
+window.addEventListener('load', function() {
+  gGen = runTest();
+  gGen.next();
+});
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_document_scripts.html b/dom/tests/mochitest/whatwg/test_document_scripts.html
new file mode 100644
index 0000000000..f0d8d27449
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_document_scripts.html
@@ -0,0 +1,55 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=685774
+-->
+<head>
+  <title>Test for document.scripts (Bug 685774)</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=685774">Mozilla Bug 685774</a>
+<script type="application/javascript">
+
+/** Test for Bug 685774 **/
+
+function testSameCollection(a, b, c) {
+  is(a.length, c, "unexpected count of script elements");
+  is(b.length, c, "unexpected count of script elements");
+  for (var i = 0; i < a.length; i++) {
+    is(a[i], b[i], "document.scripts is not supported");
+  }
+}
+
+SimpleTest.waitForExplicitFinish();
+
+testSameCollection(document.scripts, document.getElementsByTagName("script"), 3);
+
+</script>
+<script type="application/javascript">
+
+testSameCollection(document.scripts, document.getElementsByTagName("script"), 4);
+
+function start() {
+  testSameCollection(document.scripts, document.getElementsByTagName("script"), 5);
+
+  var e = document.createElement("script");
+  testSameCollection(document.scripts, document.getElementsByTagName("script"), 5);
+  document.body.appendChild(e);
+  testSameCollection(document.scripts, document.getElementsByTagName("script"), 6);
+
+  SimpleTest.finish();
+}
+
+addLoadEvent(start);
+
+</script>
+<script type="application/javascript">
+
+testSameCollection(document.scripts, document.getElementsByTagName("script"), 5);
+
+</script>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_postMessage.html b/dom/tests/mochitest/whatwg/test_postMessage.html
new file mode 100644
index 0000000000..a21abb9a00
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_postMessage.html
@@ -0,0 +1,161 @@
+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage
+-->
+<head>
+  <title>Basic postMessage tests</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage">Mozilla Bug 387706</a>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+
+<iframe src="http://mochi.test:8888/tests/dom/tests/mochitest/whatwg/postMessage_helper.html" 
+        name="otherSameDomain"></iframe>
+<iframe src="http://example.org:8000/tests/dom/tests/mochitest/whatwg/postMessage_helper.html"
+        name="otherCrossDomain"></iframe>
+
+
+<pre id="test">
+<script class="testbody" type="application/javascript">
+/** Test for Bug 387706 **/
+
+SimpleTest.waitForExplicitFinish();
+
+/** Variable for receivers to attempt to get. */
+window.privateVariable = 17;
+
+/** For sentinel finish, if necessary in deficient browsers. */
+var finished = false;
+
+/** Ends testing if it isn't already done. */
+function finish()
+{
+  if (!finished)
+  {
+    finished = true;
+    SimpleTest.finish();
+  }
+}
+
+/** Receives MessageEvents. */
+function messageReceiver(evt)
+{
+  try
+  {
+    ok(evt instanceof MessageEvent, "umm, how did we get this?");
+    is(evt.lastEventId, "",
+       "postMessage creates events with empty lastEventId");
+    is(evt.type, "message", "expected events of type 'message'");
+    ok(evt.isTrusted === true, "should have been a trusted event");
+  
+    var data = evt.data;
+  
+    // Check for the message we send to ourselves; it can't be
+    // counted as a test, and it's conceptually distinct from
+    // the other cases, so just return after handling it.
+    if (data === "post-to-self")
+    {
+      respondToSelf(evt);
+      return;
+    }
+
+    switch (evt.data)
+    {
+      case "post-to-self-response":
+        receiveSelf(evt);
+        break;
+  
+      case "post-to-other-same-domain-response":
+        receiveOtherSameDomain(evt);
+        break;
+  
+      case "post-to-other-cross-domain-response":
+        receiveOtherCrossDomain(evt);
+        
+        // All the tests have executed, so we're done.
+        finish();
+        break;
+  
+      default:
+        ok(false, "unexpected message: " + evt.data);
+        finish();
+        break;
+    }
+  }
+  catch (e)
+  {
+    ok(false, "error processing event with data '" + evt.data + "': " + e);
+    finish();
+  }
+}
+
+
+/******************
+ * SELF-RESPONDER *
+ ******************/
+
+function respondToSelf(evt)
+{
+  is(evt.origin, "http://mochi.test:8888", "event has wrong origin");
+  is(evt.source, window, "we posted this message!");
+  
+  evt.source.postMessage("post-to-self-response", evt.origin);
+}
+
+
+/*************
+ * RECEIVERS *
+ *************/
+
+function receiveSelf(evt)
+{
+  is(evt.origin, "http://mochi.test:8888", "event has wrong origin");
+  is(evt.source, window, "we posted this message!");
+
+  window.frames.otherSameDomain.postMessage("post-to-other-same-domain",
+                                            "http://mochi.test:8888");
+}
+
+function receiveOtherSameDomain(evt)
+{
+  is(evt.origin, "http://mochi.test:8888",
+     "same-domain response event has wrong origin");
+  is(evt.source, window.frames.otherSameDomain,
+     "wrong source for same-domain message!");
+
+  window.frames.otherCrossDomain.postMessage("post-to-other-cross-domain",
+                                            "http://example.org:8000");
+}
+
+function receiveOtherCrossDomain(evt)
+{
+  is(evt.origin, "http://example.org:8000",
+     "same-domain response event has wrong origin");
+
+  // can't use |is| here, because ok tries to get properties on its arguments
+  // for creating a formatted logging message
+  ok(evt.source === window.frames.otherCrossDomain,
+     "wrong source for cross-domain message!");
+}
+
+
+/**************
+ * TEST SETUP *
+ **************/
+
+function start()
+{
+  window.postMessage("post-to-self", "http://mochi.test:8888");
+}
+
+window.addEventListener("load", start);
+window.addEventListener("message", messageReceiver);
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_postMessage_basehref.html b/dom/tests/mochitest/whatwg/test_postMessage_basehref.html
new file mode 100644
index 0000000000..4a0a167d9f
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_postMessage_basehref.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=414815
+-->
+<head>
+  <title>postMessage's interaction with a &lt;base&gt; tag</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+  <base href="http://example.com/" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=414815">Mozilla Bug 414815</a>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+
+<pre id="test">
+<script class="testbody" type="application/javascript">
+/** Test for Bug 414815 **/
+
+SimpleTest.waitForExplicitFinish();
+
+function receiveMessage(evt)
+{
+  is(evt.origin, "http://mochi.test:8888", "wrong sender");
+  ok(evt.source === window, "wrong source");
+
+  is(evt.data, "generate-event", "wrong data");
+  is(evt.lastEventId, "", "wrong lastEventId");
+
+  SimpleTest.finish();
+}
+
+window.addEventListener("message", receiveMessage);
+
+function run()
+{
+  window.postMessage("generate-event", "http://mochi.test:8888");
+}
+
+window.addEventListener("load", run);
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_postMessage_chrome.html b/dom/tests/mochitest/whatwg/test_postMessage_chrome.html
new file mode 100644
index 0000000000..ceb19fc552
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_postMessage_chrome.html
@@ -0,0 +1,114 @@
+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage
+-->
+<head>
+  <title>postMessage chrome tests</title>
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/chrome-harness.js"></script>
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+</head>
+<body>
+
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage">Mozilla Bug 387706</a>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+
+<iframe src="http://example.org/tests/dom/tests/mochitest/whatwg/postMessage_chrome_helper.html"
+        name="contentDomain"></iframe>
+
+
+<pre id="test">
+<script class="testbody" type="application/javascript">
+/** Test for Bug 387706 **/
+
+SimpleTest.waitForExplicitFinish();
+
+var finished = false;
+function finish()
+{
+  if (!finished)
+  {
+    finished = true;
+    SimpleTest.finish();
+  }
+}
+
+/** Receives MessageEvents to this window. */
+function messageReceiver(evt)
+{
+  ok(evt instanceof MessageEvent, "umm, how did we get this?");
+  is(evt.type, "message", "expected events of type 'message'");
+  is(evt.lastEventId, "", "postMessage creates events with empty lastEventId");
+
+  switch (evt.data)
+  {
+    case "path-is-set":
+      chromePathIsSet(evt);
+      break;
+      
+    case "post-to-self":
+      checkSelf(evt);
+      break;
+      
+    case "post-to-content-response":
+      receiveContent(evt);
+      break;
+
+    default:
+      ok(false, "unexpected message: " + evt.data);
+      finish();
+      break;
+  }
+}
+
+
+/******************
+ * SELF-RESPONDER *
+ ******************/
+
+function checkSelf(evt)
+{
+  var prepath = getChromePrePath(window.location.href);
+
+  is(evt.isTrusted, true, "should have sent a trusted event");
+  is(evt.origin, prepath, "wrong origin for chrome: URL");
+  is(evt.source, null, "chrome posters get a null source, for security");
+
+  window.frames.contentDomain.postMessage(prepath, "*");
+}
+
+
+function chromePathIsSet(evt)
+{
+  window.frames.contentDomain.postMessage("post-to-content",
+                                          "http://example.org");
+}
+
+/*************
+ * RECEIVERS *
+ *************/
+
+function receiveContent(evt)
+{
+  is(evt.isTrusted, true, "should have sent a trusted event");
+  finish();
+}
+
+
+/**************
+ * TEST SETUP *
+ **************/
+
+function run()
+{
+  window.addEventListener("message", messageReceiver);
+  window.postMessage("post-to-self", "*");
+}
+
+window.addEventListener("load", run);
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_postMessage_closed.html b/dom/tests/mochitest/whatwg/test_postMessage_closed.html
new file mode 100644
index 0000000000..01fc1294a3
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_postMessage_closed.html
@@ -0,0 +1,77 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>postMessage's interaction with closed windows</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<p><a href="https://bugzilla.mozilla.org/show_bug.cgi?id=417075">Bug 417075</a></p>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+
+<div id="holder"></div>
+
+<pre id="test">
+<script class="testbody" type="application/javascript">
+
+SimpleTest.waitForExplicitFinish();
+
+function receiveMessage(evt)
+{
+  is(evt.origin, "http://mochi.test:8888", "wrong origin");
+  ok(evt.source === openedWindow, "wrong source");
+  is(evt.lastEventId, "", "postMessage creates events with empty lastEventId");
+
+  is(evt.data, "message", "wrong data");
+  if (evt.data !== "message")
+    return; // prevent recursion if bugs
+
+  evt.source.close();
+
+  function afterClose()
+  {
+    document.removeEventListener("message", receiveMessage);
+    evt.source.postMessage("NOT-RECEIVED", "*");
+
+    var iframe = document.createElement("iframe");
+    iframe.id = "insertedIframe";
+    $("holder").appendChild(iframe);
+    iframe.addEventListener("load", iframeLoaded);
+    iframe.src = "postMessage_closed_helper.html?parent";
+  }
+
+  setTimeout(afterClose, 0);
+}
+
+window.addEventListener("message", receiveMessage);
+
+function iframeLoaded(evt)
+{
+  var iframe = $("insertedIframe");
+  iframe.removeEventListener("load", iframeLoaded);
+
+  var iframeWindow = iframe.contentWindow;
+  $("holder").removeChild($("insertedIframe"));
+  iframeWindow.postMessage("NOT-RECEIVED", "*");
+
+  SimpleTest.finish();
+}
+
+var openedWindow;
+
+function run()
+{
+  openedWindow = window.open("postMessage_closed_helper.html?opener", "foobar");
+  if (!openedWindow)
+  {
+    ok(false, "this test must be run with popup blocking disabled");
+    SimpleTest.finish();
+  }
+}
+
+window.addEventListener("load", run);
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_postMessage_hash.html b/dom/tests/mochitest/whatwg/test_postMessage_hash.html
new file mode 100644
index 0000000000..5942a200ca
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_postMessage_hash.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>postMessage's interaction with hash URIs</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+  <base href="http://example.com/" />
+</head>
+<body>
+<p>(no bug; this is a preemptive test)</p>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+
+<iframe src="http://mochi.test:8888/tests/dom/tests/mochitest/whatwg/postMessage_hash.html#hash"
+        name="kid"></iframe>
+
+<pre id="test">
+<script class="testbody" type="application/javascript">
+
+SimpleTest.waitForExplicitFinish();
+
+function receiveMessage(evt)
+{
+  is(evt.origin, "http://mochi.test:8888", "wrong origin");
+  ok(evt.source === window.frames.kid, "wrong source");
+  is(evt.lastEventId, "", "postMessage creates events with empty lastEventId");
+
+  is(evt.data, "response-message", "wrong data");
+
+  SimpleTest.finish();
+}
+
+window.addEventListener("message", receiveMessage);
+
+function run()
+{
+  window.frames.kid.postMessage("from-parent", "http://mochi.test:8888");
+}
+
+window.addEventListener("load", run);
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_postMessage_idn.xhtml b/dom/tests/mochitest/whatwg/test_postMessage_idn.xhtml
new file mode 100644
index 0000000000..79a6ede714
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_postMessage_idn.xhtml
@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml">
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage
+-->
+<head>
+  <title>postMessage uri/domain values and IDN encoding</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage">Mozilla Bug 387706</a>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+
+<iframe src="http://sub1.ält.example.org:8000/tests/dom/tests/mochitest/whatwg/postMessage_idn_helper.html"></iframe>
+
+<pre id="test">
+<script class="testbody" type="application/javascript">
+/** Test for Bug 387706 **/
+
+SimpleTest.waitForExplicitFinish();
+
+var responseReceived = false;
+var idnWindow = null;
+
+function receiveMessage(evt)
+{
+  ok(evt instanceof MessageEvent, "umm, how did we get this?");
+  is(evt.type, "message", "expected events of type 'message'");
+  ok(evt.isTrusted === true, "should have been a trusted event");
+
+  is(evt.origin, "http://sub1.xn--lt-uia.example.org:8000",
+     "wrong origin -- IDN issue, perhaps?");
+
+  is(evt.data, "idn-response", "unexpected test result");
+  is(evt.lastEventId, "", "postMessage creates events with empty lastEventId");
+  ok(evt.source === idnWindow, "wrong source");
+
+  SimpleTest.finish();
+}
+window.addEventListener("message", receiveMessage);
+
+var xhtmlns = "http://www.w3.org/1999/xhtml";
+
+function setup()
+{
+  var idnFrame = document.getElementsByTagNameNS(xhtmlns, "iframe")[0];
+  idnWindow = idnFrame.contentWindow;
+  try
+  {
+    idnWindow.postMessage("idn-message", "http://sub1.ält.example.org:8000");
+  }
+  catch (e)
+  {
+    ok(false, "failed to post message: " + e);
+    SimpleTest.finish();
+  }
+}
+
+addLoadEvent(setup);
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_postMessage_joined.html b/dom/tests/mochitest/whatwg/test_postMessage_joined.html
new file mode 100644
index 0000000000..560fbb2911
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_postMessage_joined.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage
+-->
+<head>
+  <title>postMessage with document.domain setting to join origins</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage">Mozilla Bug 387706</a>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+
+<iframe src="http://sub1.test1.example.org/tests/dom/tests/mochitest/whatwg/postMessage_joined_helper.html"
+        name="container"></iframe>
+
+
+<pre id="test">
+<script class="testbody" type="application/javascript">
+/** Test for Bug 387706 **/
+
+SimpleTest.waitForExplicitFinish();
+
+function receiveTestResult(evt)
+{
+  ok(evt instanceof MessageEvent, "umm, how did we get this?");
+  is(evt.type, "message", "expected events of type 'message'");
+  ok(evt.isTrusted === true, "should have been a trusted event");
+
+  is(evt.lastEventId, "", "postMessage creates events with empty lastEventId");
+
+  // Either we passed the test or we failed it.  The message's
+  // contents should help to diagnose the failure.  Either way,
+  // consider this the end of the test.
+  is(evt.data, "test-passed", "unexpected test result");
+  SimpleTest.finish();
+}
+
+function setup()
+{
+  window.addEventListener("message", receiveTestResult);
+  window.frames.container.postMessage("start-test",
+                                      "http://sub1.test1.example.org");
+}
+
+addLoadEvent(setup);
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_postMessage_onOther.html b/dom/tests/mochitest/whatwg/test_postMessage_onOther.html
new file mode 100644
index 0000000000..502ebca36c
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_postMessage_onOther.html
@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage
+-->
+<head>
+  <title>postMessage called through a different same-origin page</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage">Mozilla Bug 387706</a>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+
+<iframe src="http://example.com/tests/dom/tests/mochitest/whatwg/postMessage_onOther.html"
+        name="topDomainFrame"></iframe>
+<iframe src="http://test1.example.com/tests/dom/tests/mochitest/whatwg/postMessage_onOther.html"
+        name="subDomainFrame"></iframe>
+
+
+<pre id="test">
+<script class="testbody" type="application/javascript">
+/** Test for Bug 387706 **/
+
+SimpleTest.waitForExplicitFinish();
+
+/** Receives MessageEvents to this window. */
+function messageReceiver(evt)
+{
+  ok(evt instanceof MessageEvent, "wrong event type");
+  is(evt.origin, "http://test1.example.com", "unexpected origin");
+  is(evt.lastEventId, "", "postMessage creates events with empty lastEventId");
+  is(evt.data, "test-finished",
+     "unexpected data in message");
+
+  SimpleTest.finish();
+}
+
+function run()
+{
+  window.frames.subDomainFrame.postMessage("start-test",
+                                           "http://test1.example.com");
+}
+
+window.addEventListener("message", messageReceiver);
+window.addEventListener("load", run);
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_postMessage_origin.xhtml b/dom/tests/mochitest/whatwg/test_postMessage_origin.xhtml
new file mode 100644
index 0000000000..dd027c09ff
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_postMessage_origin.xhtml
@@ -0,0 +1,465 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml">
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=417075
+-->
+<head>
+  <title>postMessage from about:blank, data URLs</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=417075">Mozilla Bug 417075</a>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+
+<iframe src="http://mochi.test:8888/tests/dom/tests/mochitest/whatwg/postMessage_origin_helper.xhtml"
+        id="sameDomain"></iframe>
+<iframe src="http://example.com/tests/dom/tests/mochitest/whatwg/postMessage_origin_helper.xhtml"
+        id="otherDomain"></iframe>
+<iframe src="http://example.org:8000/tests/dom/tests/mochitest/whatwg/postMessage_origin_helper.xhtml"
+        id="otherDomainPort"></iframe>
+<iframe src="ftp://mochi.test:27534/tests/dom/tests/mochitest/whatwg/postMessage_origin_helper.xhtml"
+        id="localNoExist"></iframe>
+
+<iframe src="http://sub1.παράδειγμα.δοκιμή/tests/dom/tests/mochitest/whatwg/postMessage_origin_helper.xhtml"
+        id="idnKidWhitelist"></iframe>
+
+<iframe src="http://sub1.exaмple.test/tests/dom/tests/mochitest/whatwg/postMessage_origin_helper.xhtml"
+        id="idnKidNoWhitelist"></iframe>
+
+
+<pre id="test">
+<script class="testbody" type="application/javascript"><![CDATA[
+/** Test for Bug 417075 **/
+
+SimpleTest.waitForExplicitFinish();
+
+function errorCheck(i, called, error, actual) {
+  ok(!called, "receiver should not have been called for test #" + i);
+  is(actual, error, "wrong error thrown in test #" + i);
+}
+
+// Sends a "PING" message to the given child frame content window and returns
+// a promise which resolves when we receive a corresponding "PONG" message back.
+function ping(win) {
+  if (win.parent !== window) {
+    throw new Error("Can only ping windows which are child frames of this window");
+  }
+  return new Promise(resolve => {
+    window.addEventListener("message", function callback(event) {
+      if (event.source === win && event.data === "PONG") {
+        window.removeEventListener("message", callback);
+        resolve();
+      }
+    });
+    win.postMessage("PING", "*");
+  });
+}
+
+var tests =
+  [
+   // 0
+   {
+     args: ["NOT-RECEIVED", ""],
+     source: "sameDomain",
+     name: "SyntaxError",
+     code: DOMException.SYNTAX_ERR
+   },
+   {
+     args: ["NOT-RECEIVED", "null"],
+     source: "sameDomain",
+     name: "SyntaxError",
+     code: DOMException.SYNTAX_ERR
+   },
+   {
+     args: ["NOT-RECEIVED", "a"],
+     source: "sameDomain",
+     name: "SyntaxError",
+     code: DOMException.SYNTAX_ERR
+   },
+   {
+     args: ["NOT-RECEIVED", "http :"],
+     source: "sameDomain",
+     name: "SyntaxError",
+     code: DOMException.SYNTAX_ERR
+   },
+   {
+     args: ["NOT-RECEIVED", "http: //"],
+     source: "sameDomain",
+     name: "SyntaxError",
+     code: DOMException.SYNTAX_ERR,
+
+     hasThrowsNoExceptionBug: true
+   },
+   // 5
+   {
+     args: ["NOT-RECEIVED", "http ://"],
+     source: "sameDomain",
+     name: "SyntaxError",
+     code: DOMException.SYNTAX_ERR
+   },
+   {
+     args: ["TODO", " http://localhost:8888"],
+     source: "sameDomain",
+     name: "SyntaxError",
+     code: DOMException.SYNTAX_ERR,
+
+     returnOrigin: "http://mochi.test:8888",
+     hasThrowsNoExceptionBug: true
+   },
+   {
+     args: ["NOT-RECEIVED", "hä"],
+     source: "sameDomain",
+     name: "SyntaxError",
+     code: DOMException.SYNTAX_ERR
+   },
+   {
+     args: ["NOT-RECEIVED", "http://lo\0k.com"],
+     source: "sameDomain",
+     name: "SyntaxError",
+     code: DOMException.SYNTAX_ERR
+   },
+   {
+     args: ["NOT-RECEIVED", "http: //localhost:8888"],
+     source: "sameDomain",
+     name: "SyntaxError",
+     code: DOMException.SYNTAX_ERR,
+
+     hasThrowsNoExceptionBug: true
+   },
+   // 10
+   {
+     args: ["NOT-RECEIVED", "http://localhost :8888"],
+     source: "sameDomain",
+     name: "SyntaxError",
+     code: DOMException.SYNTAX_ERR
+   },
+   {
+     args: ["NOT-RECEIVED", "http:// localhost:8888"],
+     source: "sameDomain",
+     name: "SyntaxError",
+     code: DOMException.SYNTAX_ERR,
+
+     hasThrowsNoExceptionBug: true
+   },
+   {
+     args: ["TODO", "http://\nlocalhost:8888"],
+     source: "sameDomain",
+     name: "SyntaxError",
+     code: DOMException.SYNTAX_ERR,
+
+     returnOrigin: "http://mochi.test:8888",
+     hasThrowsNoExceptionBug: true
+   },
+   {
+     args: ["TODO", "http://localhost:8888\0"],
+     source: "sameDomain",
+     name: "SyntaxError",
+     code: DOMException.SYNTAX_ERR,
+
+     returnOrigin: "http://mochi.test:8888",
+     hasThrowsNoExceptionBug: true
+   },
+   {
+     args: ["TODO", "http://localhost:8888\n"],
+     source: "sameDomain",
+     name: "SyntaxError",
+     code: DOMException.SYNTAX_ERR,
+
+     returnOrigin: "http://mochi.test:8888",
+     hasThrowsNoExceptionBug: true
+   },
+   // 15
+   {
+     args: ["PASS", "*"],
+     source: "sameDomain",
+     returnOrigin: "http://mochi.test:8888"
+   },
+   {
+     args: ["PASS", "http://mochi.test:8888"],
+     source: "sameDomain",
+     returnOrigin: "http://mochi.test:8888"
+   },
+   {
+     args: ["PASS", "http://example.com"],
+     source: "otherDomain",
+     returnOrigin: "http://example.com"
+   },
+   {
+     args: ["PASS", "http://example.com/"],
+     source: "otherDomain",
+     returnOrigin: "http://example.com"
+   },
+   {
+     args: ["PASS", "http://example.com:80"],
+     source: "otherDomain",
+     returnOrigin: "http://example.com"
+   },
+   // 20
+   {
+     args: ["PASS", "http://example.com:80/"],
+     source: "otherDomain",
+     returnOrigin: "http://example.com"
+   },
+   {
+     args: ["PASS", "http://example.com:80/foobar"],
+     source: "otherDomain",
+     returnOrigin: "http://example.com"
+   },
+   {
+     args: ["PASS", "http://example.com/foobar"],
+     source: "otherDomain",
+     returnOrigin: "http://example.com"
+   },
+   {
+     args: ["PASS", "http://example.com:8000"],
+     source: "otherDomain",
+     expectNoCallback: true
+   },
+   {
+     args: ["PASS", "http://example.com:8000/"],
+     source: "otherDomain",
+     expectNoCallback: true
+   },
+   // 25
+   {
+     args: ["PASS", "http://example.org:8000"],
+     source: "otherDomainPort",
+     returnOrigin: "http://example.org:8000"
+   },
+   {
+     args: ["PASS", "http://example.org:8000/"],
+     source: "otherDomainPort",
+     returnOrigin: "http://example.org:8000"
+   },
+   {
+     args: ["PASS", "http://example.org:8000/tests/dom/test/mochitest/whatwg/postMessage_origin_helper.xhtml"],
+     source: "otherDomainPort",
+     returnOrigin: "http://example.org:8000"
+   },
+   {
+     args: ["PASS", "http://example.org:8000/tests/dom/test/mochitest/whatwg/this_file_does_not_exist.xhtml"],
+     source: "otherDomainPort",
+     returnOrigin: "http://example.org:8000"
+   },
+   {
+     args: ["PASS", "http://example.org"],
+     source: "otherDomainPort",
+     expectNoCallback: true
+   },
+   // 30
+   {
+     args: ["PASS", "http://example.org:80"],
+     source: "otherDomainPort",
+     expectNoCallback: true
+   },
+   {
+     args: ["PASS", "http://example.org/"],
+     source: "otherDomainPort",
+     expectNoCallback: true
+   },
+   {
+     args: ["PASS", "http://example.org"],
+     source: "otherDomain",
+     expectNoCallback: true
+   },
+   {
+     args: ["PASS", "ftp://mochi.test:8888"],
+     source: "sameDomain",
+     expectNoCallback: true
+   },
+   {
+     args: ["PASS", "http://mochi.test:8888"],
+     source: "sameDomain",
+     returnOrigin: "http://mochi.test:8888"
+   },
+   // 35
+   {
+     args: ["PASS", "http://mochi.test:27534"],
+     source: "sameDomain",
+     expectNoCallback: true
+   },
+   {
+     args: ["PASS", "http://sub1.παράδειγμα.δοκιμή"],
+     source: "idnKidWhitelist",
+     returnOrigin: "http://sub1.xn--hxajbheg2az3al.xn--jxalpdlp"
+   },
+   {
+     args: ["PASS", "http://sub1.παράδειγμα.δοκιμή:80"],
+     source: "idnKidWhitelist",
+     returnOrigin: "http://sub1.xn--hxajbheg2az3al.xn--jxalpdlp"
+   },
+   {
+     args: ["PASS", "http://sub1.παράδειγμα.δοκιμή:80/"],
+     source: "idnKidWhitelist",
+     returnOrigin: "http://sub1.xn--hxajbheg2az3al.xn--jxalpdlp"
+   },
+   {
+     args: ["PASS", "http://sub1.παράδειγμα.δοκιμή:80/foobar"],
+     source: "idnKidWhitelist",
+     returnOrigin: "http://sub1.xn--hxajbheg2az3al.xn--jxalpdlp"
+   },
+   // 40
+   {
+     args: ["PASS", "http://sub1.παράδειγμα.δοκιμή/foobar"],
+     source: "idnKidWhitelist",
+     returnOrigin: "http://sub1.xn--hxajbheg2az3al.xn--jxalpdlp"
+   },
+   {
+     args: ["PASS", "http://sub1.xn--hxajbheg2az3al.xn--jxalpdlp"],
+     source: "idnKidWhitelist",
+     returnOrigin: "http://sub1.xn--hxajbheg2az3al.xn--jxalpdlp"
+   },
+   {
+     args: ["PASS", "http://sub1.xn--hxajbheg2az3al.xn--jxalpdlp:80"],
+     source: "idnKidWhitelist",
+     returnOrigin: "http://sub1.xn--hxajbheg2az3al.xn--jxalpdlp"
+   },
+   {
+     args: ["PASS", "http://sub1.xn--hxajbheg2az3al.xn--jxalpdlp:80/"],
+     source: "idnKidWhitelist",
+     returnOrigin: "http://sub1.xn--hxajbheg2az3al.xn--jxalpdlp"
+   },
+   {
+     args: ["PASS", "http://sub1.xn--hxajbheg2az3al.xn--jxalpdlp:80/foo"],
+     source: "idnKidWhitelist",
+     returnOrigin: "http://sub1.xn--hxajbheg2az3al.xn--jxalpdlp"
+   },
+   // 45
+   {
+     args: ["PASS", "http://sub1.exaмple.test"],
+     source: "idnKidNoWhitelist",
+     returnOrigin: "http://sub1.xn--exaple-kqf.test",
+   },
+   {
+     args: ["PASS", "http://sub1.exaмple.test:80"],
+     source: "idnKidNoWhitelist",
+     returnOrigin: "http://sub1.xn--exaple-kqf.test",
+   },
+   {
+     args: ["PASS", "http://sub1.exaмple.test:80/"],
+     source: "idnKidNoWhitelist",
+     returnOrigin: "http://sub1.xn--exaple-kqf.test",
+   },
+   {
+     args: ["PASS", "http://sub1.exaмple.test/"],
+     source: "idnKidNoWhitelist",
+     returnOrigin: "http://sub1.xn--exaple-kqf.test",
+   },
+   {
+     args: ["PASS", "http://sub1.exaмple.test/foobar"],
+     source: "idnKidNoWhitelist",
+     returnOrigin: "http://sub1.xn--exaple-kqf.test",
+   },
+   // 50
+   {
+     args: ["PASS", "http://sub1.xn--exaple-kqf.test"],
+     source: "idnKidNoWhitelist",
+     returnOrigin: "http://sub1.xn--exaple-kqf.test",
+   },
+   {
+     args: ["PASS", "http://sub1.xn--exaple-kqf.test:80"],
+     source: "idnKidNoWhitelist",
+     returnOrigin: "http://sub1.xn--exaple-kqf.test",
+   },
+   {
+     args: ["PASS", "http://sub1.xn--exaple-kqf.test:80/"],
+     source: "idnKidNoWhitelist",
+     returnOrigin: "http://sub1.xn--exaple-kqf.test",
+   },
+   {
+     args: ["PASS", "http://sub1.xn--exaple-kqf.test/"],
+     source: "idnKidNoWhitelist",
+     returnOrigin: "http://sub1.xn--exaple-kqf.test",
+   },
+   {
+     args: ["PASS", "http://sub1.xn--exaple-kqf.test/foobar"],
+     source: "idnKidNoWhitelist",
+     returnOrigin: "http://sub1.xn--exaple-kqf.test",
+   },
+  ];
+
+async function allTests() {
+  let target, called, test, i;
+
+  let listener = evt => {
+    // Ignore "PONG" messages, which are used to ensure synchronization
+    // between scripts in parent and child frames.
+    if (evt.data === "PONG") {
+      return;
+    }
+
+    is(test, tests[i],
+       "i and test are out of sync!  async is hard, let's go shopping");
+
+    var originCheck = test.hasWrongReturnOriginBug ? todo_is : is;
+    originCheck(evt.origin, test.returnOrigin, "wrong origin for #" + i);
+    if (test.args[0] == "TODO")
+      todo_is(evt.data, "PASS", "wrong data");
+    else
+      is(evt.data, "PASS", "wrong data");
+    is(evt.lastEventId, "",
+       "postMessage creates events with empty lastEventId");
+    ok(evt.source === target, "wrong source");
+    called = true;
+  };
+  window.addEventListener("message", listener);
+
+  for ([i, test] of tests.entries()) {
+    called = false;
+    target = $(test.source).contentWindow;
+    try {
+      target.postMessage.apply(target, test.args);
+    } catch (e) {
+      // Since an exception was thrown, we know at this point that we're not
+      // waiting on anything else in the queue of script to run, and we can just
+      // continue immediately.
+      errorCheck(i, called, e.name, test.name);
+      errorCheck(i, called, e.code, test.code);
+      continue;
+    }
+
+    // Perform a postMessage round-trip to ensure the target frame has
+    // processed our message and we've had time to receive its reply.
+    await ping(target);
+
+    if (test.hasThrowsNoExceptionBug) {
+      todo(false, `should throw on test #${i}`);
+    } else {
+      is(!test.expectNoCallback, called, `should have been called #${i}`);
+    }
+  }
+
+  window.removeEventListener("message", listener);
+}
+
+async function oddballTests() {
+  for (let i = 0; i < 2; i++) {
+    let evt = await new Promise(resolve => {
+      window.addEventListener("message", function listener(evt) {
+        resolve(evt);
+        window.removeEventListener("message", listener);
+      });
+      window.postMessage("PASS", "http://mochi.test:8888");
+    });
+
+    is(evt.origin, "http://mochi.test:8888", "wrong sender");
+    is(evt.data, "PASS", "wrong data");
+    is(evt.lastEventId, "",
+       "postMessage creates events with empty lastEventId");
+    ok(evt.source === window, "wrong source");
+  }
+}
+
+async function run() {
+  await oddballTests();
+  await allTests();
+  SimpleTest.finish();
+}
+
+window.addEventListener("load", run);
+]]></script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_postMessage_override.html b/dom/tests/mochitest/whatwg/test_postMessage_override.html
new file mode 100644
index 0000000000..8414344f8d
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_postMessage_override.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage
+-->
+<head>
+  <title>postMessage override test</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage">Mozilla Bug 387706</a>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+
+<iframe src="http://example.org:8000/tests/dom/tests/mochitest/whatwg/postMessage_override_helper.html"></iframe>
+
+
+<pre id="test">
+<script class="testbody" type="application/javascript">
+/** Test for Bug 387706 **/
+
+SimpleTest.waitForExplicitFinish();
+
+async function run() {
+  function ping(win, msg) {
+    return new Promise(resolve => {
+      window.addEventListener("message", evt => {
+        is(evt.source, win, "Response should come from the correct window");
+        is(evt.data, msg, "Should get the correct response");
+        resolve();
+      }, { once: true });
+
+      win.postMessage(msg, "http://example.org:8000");
+    });
+  }
+
+  await ping(frames[0], "PASS 1");
+  await ping(frames[0], "PASS 2");
+  SimpleTest.finish();
+}
+
+window.addEventListener("load", run);
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_postMessage_special.xhtml b/dom/tests/mochitest/whatwg/test_postMessage_special.xhtml
new file mode 100644
index 0000000000..deb3930550
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_postMessage_special.xhtml
@@ -0,0 +1,304 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml">
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage
+-->
+<head>
+  <title>postMessage from about:blank, data URLs</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage">Mozilla Bug 387706</a>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+
+<pre id="test">
+<script class="testbody" type="application/javascript"><![CDATA[
+/** Test for Bug 387706 **/
+
+SimpleTest.waitForExplicitFinish();
+
+var B64_CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+/**
+ * Encodes an array of bytes into a string using the base 64 encoding scheme.
+ *
+ * @param bytes
+ *   An array of bytes to encode.
+ */
+function b64(str)
+{
+  var byteArray = new Array(str.length);
+  for (var i = 0, sz = str.length; i < sz; i++)
+    byteArray[i] = str.charCodeAt(i);
+
+  var index = 0;
+  function get3Bytes()
+  {
+    if (byteArray.length - index < 3)
+      return null; // Less than three bytes remaining
+
+    // Return the next three bytes in the array, and increment index for our
+    // next invocation
+    return byteArray.slice(index, index += 3);
+  }
+
+  var out = "";
+  var bytes = null;
+  while ((bytes = get3Bytes()))
+  {
+    var bits = 0;
+    for (var i = 0; i < 3; i++)
+      bits = (bits << 8) | bytes[i];
+    for (var j = 18; j >= 0; j -= 6)
+      out += B64_CHARS[(bits>>j) & 0x3F];
+  }
+
+  // Get the remaining bytes
+  bytes = byteArray.slice(index);
+
+  switch (bytes.length)
+  {
+    case 2:
+      out += B64_CHARS[(bytes[0]>>2) & 0x3F] +
+             B64_CHARS[((bytes[0] & 0x03) << 4) | ((bytes[1] >> 4) & 0x0F)] +
+             B64_CHARS[((bytes[1] & 0x0F) << 2)] +
+             "=";
+      break;
+    case 1:
+      out += B64_CHARS[(bytes[0]>>2) & 0x3F] +
+             B64_CHARS[(bytes[0] & 0x03) << 4] +
+             "==";
+      break;
+  }
+
+  return out;
+}
+
+
+var aboutBlankWindow = null;
+var aboutBlank2Window = null;
+var dataWindow = null;
+
+/** Convert a nullable string to a pretty representation */
+function sourceify(v)
+{
+  if (typeof v == "string")
+    return "'" + v + "'";
+  return String(v);
+}
+
+/** Receives MessageEvents to this window. */
+function messageReceiver(evt)
+{
+  // It's not clear what the security model is for data: URLs and whether they
+  // can access their parents; WebKit denies access, while Gecko currently
+  // allows it.  We work around this problem by using postMessage (surprise!)
+  // to start the round of tests when each iframe loads.
+  if (evt.data === "next-test")
+  {
+    setTimeout(nextTest, 0);
+    return;
+  }
+
+
+  try
+  {
+    ok(evt instanceof MessageEvent, "umm, how did we get this?");
+    is(evt.type, "message", "expected events of type 'message'");
+    ok(evt.isTrusted === true, "should have been a trusted event");
+  
+    if (evt.data === "about:blank-response")
+    {
+      // This isn't clarified in HTML5 yet, but the origin for a document which
+      // has been open()ed is the origin of the calling code, somewhat loosely
+      // speaking.  For the specific case of about:blank it's also possible
+      // that the origin is determined by the code that opens the window.  It's
+      // not codified yet which of these two causes the identifier tokens on
+      // the event generated by the new window to be those of this window, but
+      // in either case this is what they should be.
+      is(evt.origin, "http://mochi.test:8888",
+         "wrong origin for event from about:blank");
+      is(evt.source, aboutBlankWindow, "wrong source");
+
+      // ...and onto the next test
+      setupBlank2();
+    }
+    else if (evt.data === "about:blank2-response")
+    {
+      is(evt.origin, "http://mochi.test:8888",
+         "wrong origin for event from about:blank #2");
+      is(evt.source, aboutBlank2Window, "wrong source");
+
+      setupData();
+    }
+    else if (evt.data === "data-response")
+    {
+      is(evt.origin, "null",
+         "wrong origin for event from data URL (should be the origin of the " +
+         "window/script that opened the URL, in this case the origin of this " +
+         "file)");
+      is(evt.source, dataWindow, "wrong source");
+
+      finish();
+    }
+    else
+    {
+      ok(false, "unexpected message: " + evt.data);
+    }
+  }
+  catch (e)
+  {
+    ok(false, "error processing event with data '" + evt.data + "': " + e);
+  }
+}
+
+function getContents(description, responseText)
+{
+  var contents =
+    "<!DOCTYPE html>\n" +
+    "<html>\n" +
+    "<head>\n" + 
+    "  <title>about:blank</title>\n" +
+    "  <script type='application/javascript'>\n" +
+    "function receive(evt)\n" +
+    "{\n" +
+    "  var response = '" + responseText + "';\n" +
+    "\n" +
+    "  if (evt.source !== window.parent)\n" +
+    "    response += ' wrong-source';\n" +
+    "  if (evt.origin !== 'http://mochi.test:8888')\n" +
+    "    response += ' wrong-origin(' + evt.origin + ')';\n" +
+    "  if (evt.data !== 'from-opener')\n" +
+    "    response += ' wrong-data(' + evt.data + ')';\n" +
+    "\n" +
+    "  window.parent.postMessage(response, 'http://mochi.test:8888');\n" +
+    "}\n" +
+    "\n" +
+    "function ready()\n" +
+    "{\n" +
+    "  window.parent.postMessage('next-test', 'http://mochi.test:8888');\n" +
+    "}\n" +
+    "\n" +
+    "window.addEventListener('load', ready, false);\n" +
+    "window.addEventListener('message', receive, false);\n" +
+    "  </script>\n" +
+    "</head>\n" +
+    "<body><p>" + description + "</p></body>\n" +
+    "</html>";
+
+  return contents;
+}
+
+function finish()
+{
+  SimpleTest.finish();
+}
+
+var xhtmlns = "http://www.w3.org/1999/xhtml";
+
+function insert(el)
+{
+  var content = $("content");
+  content.parentNode.insertBefore(el, content);
+}
+
+function setupBlank()
+{
+  var aboutBlankFrame = document.createElementNS(xhtmlns, "iframe");
+  aboutBlankFrame.setAttribute("src", "about:blank");
+  insert(aboutBlankFrame);
+
+  aboutBlankWindow = aboutBlankFrame.contentWindow;
+  var doc = aboutBlankWindow.document;
+  doc.open();
+  doc.write(getContents("This was about:blank #1", "about:blank-response"));
+  doc.close();
+
+  // I don't believe anything guarantees sync parsing, so we have to wait for
+  // the new window to poke us to actually do the test.  :-\
+}
+
+function setupBlank2()
+{
+  var aboutBlank2Frame = document.createElementNS(xhtmlns, "iframe");
+  aboutBlank2Frame.addEventListener("load", nextTest);
+  aboutBlank2Frame.setAttribute("src", "about:blank");
+
+  insert(aboutBlank2Frame);
+}
+
+// Could use window.btoa here, but that's not standardized, and we want to be
+// able to run these tests against browsers that don't support it.
+var dataURI = "data:text/html;base64," +
+              b64(getContents("A data: URL", "data-response"));
+
+function setupData()
+{
+  var dataFrame = document.createElementNS(xhtmlns, "iframe");
+  dataFrame.setAttribute("src", dataURI);
+  insert(dataFrame);
+
+  dataWindow = dataFrame.contentWindow;
+
+  // ...and wait again for the window to load...
+}
+
+var count = 0;
+function nextTest()
+{
+  switch (count++)
+  {
+    case 0:
+      testBlank();
+      break;
+
+    case 1:
+      testBlank2();
+      break;
+
+    case 2:
+      testData();
+      break;
+
+    default:
+      ok(false, "unreached");
+      break;
+  }
+}
+
+function testBlank()
+{
+  aboutBlankWindow.postMessage("from-opener", "http://mochi.test:8888");
+}
+
+function testBlank2()
+{
+  // For some reason we can't access this across browsers prior to the iframe
+  // loading, so set its value here.
+  aboutBlank2Window = window.frames[1];
+
+  var doc = aboutBlank2Window.document;
+
+  doc.body.textContent = "This was about:blank #2";
+
+  var script = doc.createElement("script");
+  script.textContent =
+    "window.parent.postMessage('about:blank2-response', " +
+    "                          'http://mochi.test:8888');";
+  doc.body.appendChild(script);
+}
+
+function testData()
+{
+  dataWindow.postMessage("from-opener", "*");
+}
+
+window.addEventListener("message", messageReceiver);
+
+addLoadEvent(setupBlank);
+]]></script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_postMessage_structured_clone.html b/dom/tests/mochitest/whatwg/test_postMessage_structured_clone.html
new file mode 100644
index 0000000000..9574dcacd4
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_postMessage_structured_clone.html
@@ -0,0 +1,70 @@
+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=553125
+-->
+<head>
+  <title>postMessage uses structured clone</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>  
+  <script type="application/javascript"
+          src="postMessage_structured_clone_helper.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=553125">Mozilla Bug 553125</a>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+
+<iframe src="http://mochi.test:8888/tests/dom/tests/mochitest/whatwg/postMessage_structured_clone_helper.html"
+        name="sameDomain"></iframe>
+<iframe src="http://example.org:8000/tests/dom/tests/mochitest/whatwg/postMessage_structured_clone_helper.html"
+        name="crossDomain"></iframe>
+
+
+<pre id="test">
+<script class="testbody" type="application/javascript">
+/** Test for Bug 553125 **/
+
+SimpleTest.waitForExplicitFinish();
+
+var lastMessage = null;
+var crossOrigin = false;
+var generator = getTestContent();
+
+function runNextSameOrigin() {
+  let {done, value} = generator.next();
+  if (done) {
+    generator = getTestContent();
+    crossOrigin = true;
+    runNextCrossOrigin();
+    return;
+  }
+  lastMessage = value;
+  window.frames.sameDomain.postMessage(lastMessage, "http://mochi.test:8888");
+}
+
+function runNextCrossOrigin() {
+  let {done, value} = generator.next();
+  if (done) {
+    SimpleTest.finish();
+    return;
+  }
+  lastMessage = value;
+  window.frames.crossDomain.postMessage(lastMessage, "http://example.org:8000");
+}
+
+function receiveMessage(evt) {
+  if (evt.data == "TEST-PASS")
+    SimpleTest.ok(true, "structured clone of | " + lastMessage + " | succeeded");
+  else
+    SimpleTest.ok(false, "structured clone of | " + lastMessage + " | failed");
+  setTimeout(crossOrigin ? runNextCrossOrigin : runNextSameOrigin, 0);
+}
+
+window.addEventListener("message", receiveMessage);
+window.addEventListener("load", runNextSameOrigin);
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_postMessage_throw.html b/dom/tests/mochitest/whatwg/test_postMessage_throw.html
new file mode 100644
index 0000000000..8d71ea38cf
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_postMessage_throw.html
@@ -0,0 +1,74 @@
+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage
+-->
+<head>
+  <title>postMessage with a thrown exception</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=postMessage">Mozilla Bug 387706</a>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+
+<iframe src="http://mochi.test:8888/tests/dom/tests/mochitest/whatwg/postMessage_throw_helper.html"
+        name="sameDomain"></iframe>
+<iframe src="http://example.org:8000/tests/dom/tests/mochitest/whatwg/postMessage_throw_helper.html"
+        name="crossDomain"></iframe>
+
+
+<pre id="test">
+<script class="testbody" type="application/javascript">
+/** Test for Bug 387706 **/
+
+SimpleTest.waitForExplicitFinish();
+
+function atLoad()
+{
+  try
+  {
+    sameDomain.postMessage("foo", "http://mochi.test:8888");
+    ok(true, "should not have thrown for same-domain exception");
+  }
+  catch (e)
+  {
+    ok(false, "uh-oh, threw a same-domain exception: " + e);
+  }
+
+  setTimeout(next, 0);
+}
+
+function next()
+{
+  ok(true, "no pending-exception wackiness for same-domain");
+  setTimeout(next2, 0);
+}
+
+function next2()
+{
+  try
+  {
+    crossDomain.postMessage("foo", "http://example.org:8000");
+    ok(true, "should not have thrown for cross-domain exception");
+  }
+  catch (e)
+  {
+    ok(false, "uh-oh, threw a cross-domain exception: " + e);
+  }
+
+  setTimeout(next3, 0);
+}
+
+function next3()
+{
+  ok(true, "no pending-exception wackiness for cross-domain");
+  SimpleTest.finish();
+}
+
+addLoadEvent(atLoad);
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_postMessage_transfer.html b/dom/tests/mochitest/whatwg/test_postMessage_transfer.html
new file mode 100644
index 0000000000..e7d8758bd6
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_postMessage_transfer.html
@@ -0,0 +1,61 @@
+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=822094
+-->
+<head><meta charset=utf-8>
+  <title>postMessage transferable tests</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=822094">Mozilla Bug 822094</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+<iframe src="postMessage_transfer_helper.html"
+        name="sameDomain"></iframe>
+<iframe src="http://example.org:8000/tests/dom/tests/mochitest/whatwg/postMessage_transfer_helper.html"
+        name="crossDomain"></iframe>
+
+</div>
+<pre id="test">
+<script class="testbody" type="application/javascript">
+
+SimpleTest.waitForExplicitFinish();
+
+var tests = [
+  function() { testFunc(window, "http://mochi.test:8888"); },
+  function() { testFunc(frames.sameDomain, "http://mochi.test:8888"); },
+  function() { testFunc(frames.crossDomain, "http://example.org:8000"); },
+  function() { SimpleTest.finish(); },
+];
+
+function testFunc(target, origin) {
+  var ab = new ArrayBuffer(1);
+  var cd = new ArrayBuffer(1);
+
+  target.postMessage([ab, cd], origin, [ab]);
+  is(ab.byteLength, 0, "ab should be detached");
+  is(cd.byteLength, 1, "cd should not be detached");
+
+  onmessage = function(e) {
+    is(e.data[0].byteLength, 1, "ab should be transfered");
+    is(e.data[1].byteLength, 1, "cd should be cloned");
+    nextTest();
+  };
+}
+
+function nextTest() {
+  var t = tests.shift();
+  t();
+};
+
+onload = function() {
+  nextTest();
+};
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_postMessage_userpass.html b/dom/tests/mochitest/whatwg/test_postMessage_userpass.html
new file mode 100644
index 0000000000..b47266fc45
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_postMessage_userpass.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=417075
+-->
+<head>
+  <title>postMessage from a page with username/password in its URI</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=417075">Mozilla Bug 417075</a>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+
+<iframe src="http://bobhope:password@example.org/tests/dom/tests/mochitest/whatwg/postMessage_userpass_helper.html"
+        name="userPassKid"></iframe>
+
+
+<pre id="test">
+<script class="testbody" type="application/javascript">
+/** Test for Bug 417075 **/
+
+SimpleTest.waitForExplicitFinish();
+
+function receiveMessage(evt)
+{
+  is(evt.origin, "http://example.org", "wrong origin");
+  is(evt.data, "child-message", "wrong data");
+  is(evt.lastEventId, "", "postMessage creates events with empty lastEventId");
+  ok(evt.source === window.frames.userPassKid, "wrong source");
+  SimpleTest.finish();
+}
+
+window.addEventListener("message", receiveMessage);
+
+function sendMessage(evt)
+{
+  window.frames.userPassKid.postMessage("parent-message", "http://example.org");
+}
+
+window.addEventListener("load", sendMessage);
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/tests/mochitest/whatwg/test_structuredCloneAndExposed.html b/dom/tests/mochitest/whatwg/test_structuredCloneAndExposed.html
new file mode 100644
index 0000000000..2bd15247af
--- /dev/null
+++ b/dom/tests/mochitest/whatwg/test_structuredCloneAndExposed.html
@@ -0,0 +1,307 @@
+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1828264
+-->
+<head>
+  <title>Basic structured clone tests</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1828264">Mozilla Bug 1828264</a>
+<p id="display">
+<iframe id="frame"></iframe>
+<image href="four-colors.png" height="320" width="240"/>
+</p>
+<div id="content" style="display: none"></div>
+
+
+<pre id="test">
+<script class="testbody" type="application/javascript">
+
+SimpleTest.waitForExplicitFinish();
+
+class WebIDLGlobal {
+  globalNames;
+  resolve;
+  #otherSide;
+
+  constructor(globalNames, initSides) {
+    this.globalNames = globalNames;
+    let global = this;
+    this.#otherSide = initSides().then(([ourSide, otherSide, cleanup]) => {
+      if (cleanup) {
+        SimpleTest.registerCleanupFunction(cleanup);
+      }
+      ourSide.addEventListener("message", ({ data }) => {
+        global.resultReceived(data);
+      });
+      return otherSide;
+    });
+  }
+
+  get otherSide() {
+    return this.#otherSide;
+  }
+
+  waitForResult() {
+    ok(!this.resolve, "Still waiting on previous message?");
+    return new Promise(resolve => {
+      this.resolve = resolve;
+    });
+  }
+  resultReceived(value) {
+    this.resolve(value);
+    this.resolve = undefined;
+  }
+}
+
+// Init functions return an array containing in order the object to use for
+// sending a messages to the other global, the object to use to listen for
+// messages from the other global and optioanlly a cleanup function.
+
+function waitForInitMessage(target) {
+  return new Promise(resolve => {
+    target.addEventListener("message", resolve, { once: true });
+  });
+}
+
+function getModuleURL(additionalScript = "") {
+  return new URL(
+    `file_structuredCloneAndExposed.sjs?additionalScript=${encodeURIComponent(
+      additionalScript
+    )}`,
+    location.href
+  );
+}
+
+function initFrame() {
+  let callInstallListeners = `
+    installListeners(globalThis, parent);
+    `;
+  frame.srcdoc =
+    `<script src="${getModuleURL(callInstallListeners)}" type="module"></` +
+    `script>`;
+  return waitForInitMessage(self).then(() => [self, frame.contentWindow]);
+}
+
+function initDedicatedWorker() {
+  let callInstallListeners = `
+    installListeners(globalThis, globalThis);
+    `;
+  const worker = new Worker(getModuleURL(callInstallListeners), {
+    type: "module",
+  });
+  return waitForInitMessage(worker).then(() => [worker, worker]);
+}
+
+function initSharedWorker() {
+  let callInstallListeners = `
+    self.addEventListener("connect", (e) => {
+      const port = e.ports[0];
+      port.start();
+      installListeners(port, port);
+    });
+    `;
+  const worker = new SharedWorker(getModuleURL(callInstallListeners), {
+    type: "module",
+  });
+  worker.port.start();
+  return waitForInitMessage(worker.port).then(() => [worker.port, worker.port]);
+}
+
+function initServiceWorker() {
+  let callInstallListeners = `
+    addEventListener("message", ({ source: client }) => {
+      installListeners(globalThis, client);
+    }, { once: true });
+    `;
+
+  return navigator.serviceWorker
+    .register(getModuleURL(callInstallListeners), { type: "module" })
+    .then(registration => {
+      let worker =
+        registration.installing || registration.waiting || registration.active;
+      worker.postMessage("installListeners");
+      return waitForInitMessage(navigator.serviceWorker).then(() => [
+        navigator.serviceWorker,
+        worker,
+        () => registration.unregister(),
+      ]);
+    });
+}
+
+function initAudioWorklet() {
+  const exporter = `
+    export { installListeners };
+  `;
+
+  const workletSource = `
+    import { installListeners } from "${getModuleURL(exporter)}";
+
+    class CustomAudioWorkletProcessor extends AudioWorkletProcessor {
+      constructor() {
+        super();
+        this.port.start();
+        installListeners(this.port, this.port, "AudioWorklet");
+      }
+
+      process(inputs, outputs, params) {
+        // Do nothing, output silence
+      }
+    }
+
+    registerProcessor("custom-audio-worklet-processor", CustomAudioWorkletProcessor);
+    `;
+  let workletURL = URL.createObjectURL(
+    new Blob([workletSource], { type: "text/javascript" })
+  );
+
+  // We need to keep the context alive while we're using the message ports.
+  globalThis.context = new OfflineAudioContext(1, 64, 8000);
+  return context.audioWorklet.addModule(workletURL).then(() => {
+    let node = new AudioWorkletNode(context, "custom-audio-worklet-processor");
+    node.port.start();
+    return waitForInitMessage(node.port).then(() => [
+      node.port,
+      node.port,
+      () => {
+        node.port.close();
+        delete globalThis.context;
+      },
+    ]);
+  });
+}
+
+const globals = [
+  ["Window", ["Window"], initFrame],
+  [
+    "DedicatedWorkerGlobalScope",
+    ["Worker", "DedicatedWorker"],
+    initDedicatedWorker,
+  ],
+  ["SharedWorkerGlobalScope", ["Worker", "SharedWorker"], initSharedWorker],
+  ["ServiceWorkerGlobalScope", ["Worker", "ServiceWorker"], initServiceWorker],
+  // WorkerDebuggerGlobalScope can only receive string messages.
+  ["AudioWorkletGlobalScope", ["Worklet", "AudioWorklet"], initAudioWorklet],
+  // PaintWorkletGlobalScope doesn't have a messaging mechanism
+].map(([global, globalNames, init]) => [
+  global,
+  new WebIDLGlobal(globalNames, init),
+]);
+
+
+function generateCertificate() {
+  return RTCPeerConnection.generateCertificate({
+    name: "ECDSA",
+    namedCurve: "P-256",
+  });
+}
+
+function makeCanvas() {
+  const width = 20;
+  const height = 20;
+  let canvas = new OffscreenCanvas(width, height);
+  let ctx = canvas.getContext("2d");
+  ctx.fillStyle = "rgba(50, 100, 150, 255)";
+  ctx.fillRect(0, 0, width, height);
+  return canvas;
+}
+
+function makeVideoFrame() {
+  return new VideoFrame(makeCanvas(), { timestamp: 1, alpha: "discard" });
+}
+
+function makeImageBitmap() {
+  return makeCanvas().transferToImageBitmap();
+}
+
+const serializable = [
+  ["DOMException", ["Window", "Worker"], () => new DOMException()],
+  ["DOMMatrixReadOnly", ["Window", "Worker"], () => new DOMMatrixReadOnly()],
+  ["ImageBitmap", ["Window", "Worker"], makeImageBitmap],
+  ["RTCCertificate", ["Window"], generateCertificate],
+  ["VideoFrame", ["Window", "DedicatedWorker"], makeVideoFrame],
+];
+
+const transferable = [
+  [
+    "MessagePort",
+    ["Window", "Worker", "AudioWorklet"],
+    () => new MessageChannel().port1,
+  ],
+  ["ImageBitmap", ["Window", "Worker"], makeImageBitmap],
+  ["ReadableStream", ["*"], () => new ReadableStream()],
+  ["VideoFrame", ["Window", "DedicatedWorker"], makeVideoFrame],
+];
+
+
+function isExposed(exposure, global) {
+  if (exposure.length === 1 && exposure[0] === "*") {
+    return true;
+  }
+  return !!global.globalNames.filter(v => exposure.includes(v)).length;
+}
+
+
+async function runTest() {
+  await SpecialPowers.pushPrefEnv({ set: [["dom.media.webcodecs.enabled", true]] });
+
+  async function testDOMClass(domClass, exposure, createObject, transferable) {
+    for ([globalName, webidlGlobal] of globals) {
+      info(
+        `Testing ${
+          transferable ? "transfer" : "serialization"
+        } of ${domClass} with ${globalName}`
+      );
+
+      let object = await createObject();
+      let otherSide = await webidlGlobal.otherSide;
+      let options = { targetOrigin: "*" };
+      let message;
+      if (transferable) {
+        options.transfer = [object];
+      } else {
+        message = object;
+      }
+      otherSide.postMessage(message, options);
+
+      let result = await webidlGlobal.waitForResult();
+      let expected = isExposed(exposure, webidlGlobal);
+
+      if (
+        domClass === "ImageBitmap" &&
+        globalName === "ServiceWorkerGlobalScope"
+      ) {
+        // Service workers don't support transferring shared memory objects
+        // (see ServiceWorker::PostMessage).
+        expected = false;
+      }
+
+      is(
+        result,
+        expected,
+        `Deserialization for ${domClass} in ${globalName} ${
+          expected ? "should" : "shouldn't"
+        } succeed`
+      );
+    }
+  }
+
+  for ([domClass, exposure, createObject] of serializable) {
+    await testDOMClass(domClass, exposure, createObject, false);
+  }
+  for ([domClass, exposure, createObject] of transferable) {
+    await testDOMClass(domClass, exposure, createObject, true);
+  }
+
+  SimpleTest.finish();
+}
+
+runTest();
+
+</script>
+</pre>
+</body>
+</html>
-- 
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