diff -r 000000000000 -r 6474c204b198 browser/base/content/test/plugins/browser_CTP_iframe.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/test/plugins/browser_CTP_iframe.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,102 @@
+let rootDir = getRootDirectory(gTestPath);
+const gTestRoot = rootDir;
+const gHttpTestRoot = rootDir.replace("chrome://mochitests/content/", "http://127.0.0.1:8888/");
+
+let gTestBrowser = null;
+let gNextTest = null;
+
+Components.utils.import("resource://gre/modules/Services.jsm");
+
+function test() {
+  waitForExplicitFinish();
+  registerCleanupFunction(function() {
+    clearAllPluginPermissions();
+    Services.prefs.clearUserPref("extensions.blocklist.suppressUI");
+  });
+  Services.prefs.setBoolPref("extensions.blocklist.suppressUI", true);
+
+  let newTab = gBrowser.addTab();
+  gBrowser.selectedTab = newTab;
+  gTestBrowser = gBrowser.selectedBrowser;
+  gTestBrowser.addEventListener("load", pageLoad, true);
+
+  Services.prefs.setBoolPref("plugins.click_to_play", true);
+  setTestPluginEnabledState(Ci.nsIPluginTag.STATE_CLICKTOPLAY);
+
+  prepareTest(delayTest(runAfterPluginBindingAttached(test1)), gHttpTestRoot + "plugin_iframe.html");
+}
+
+function finishTest() {
+  clearAllPluginPermissions();
+  gTestBrowser.removeEventListener("load", pageLoad, true);
+  gBrowser.removeCurrentTab();
+  window.focus();
+  finish();
+}
+
+function pageLoad() {
+  gNextTest();
+}
+
+function prepareTest(nextTest, url) {
+  gNextTest = nextTest;
+  gTestBrowser.contentWindow.location = url;
+}
+
+// Delay executing a test for one load event to wait for frame loads.
+function delayTest(nextTest) {
+  return () => {
+    gNextTest = nextTest;
+  }
+}
+
+// Due to layout being async, "PluginBindAttached" may trigger later.
+// This wraps a function to force a layout flush, thus triggering it,
+// and schedules the function execution so they're definitely executed
+// afterwards.
+function runAfterPluginBindingAttached(func) {
+  return () => {
+    let frame = gTestBrowser.contentDocument.getElementById("frame");
+    let doc = frame.contentDocument;
+    let elems = doc.getElementsByTagName('embed');
+    if (elems.length < 1) {
+      elems = doc.getElementsByTagName('object');
+    }
+    elems[0].clientTop;
+    executeSoon(func);
+  };
+}
+
+// Tests that the overlays are visible and actionable if the plugin is in an iframe.
+function test1() {
+  let frame = gTestBrowser.contentDocument.getElementById("frame");
+  let doc = frame.contentDocument;
+  let plugin = doc.getElementById("test");
+  ok(plugin, "Test 1, Found plugin in page");
+
+  let overlay = doc.getAnonymousElementByAttribute(plugin, "anonid", "main");
+  ok(overlay.classList.contains("visible"), "Test 1, Plugin overlay should exist, not be hidden");
+  let closeIcon = doc.getAnonymousElementByAttribute(plugin, "anonid", "closeIcon")
+
+  EventUtils.synthesizeMouseAtCenter(closeIcon, {}, frame.contentWindow);
+  let condition = () => !overlay.classList.contains("visible");
+  waitForCondition(condition, test2, "Test 1, Waited too long for the overlay to become invisible.");
+}
+
+function test2() {
+  prepareTest(delayTest(runAfterPluginBindingAttached(test3)), gHttpTestRoot + "plugin_iframe.html");
+}
+
+function test3() {
+  let frame = gTestBrowser.contentDocument.getElementById("frame");
+  let doc = frame.contentDocument;
+  let plugin = doc.getElementById("test");
+  ok(plugin, "Test 3, Found plugin in page");
+
+  let overlay = doc.getAnonymousElementByAttribute(plugin, "anonid", "main");
+  ok(overlay.classList.contains("visible"), "Test 3, Plugin overlay should exist, not be hidden");
+
+  EventUtils.synthesizeMouseAtCenter(plugin, {}, frame.contentWindow);
+  let condition = () => PopupNotifications.getNotification("click-to-play-plugins", gTestBrowser);
+  waitForCondition(condition, finishTest, "Test 3, Waited too long for the doorhanger to pop up.");
+}