diff -r 000000000000 -r 6474c204b198 browser/base/content/test/plugins/browser_CTP_hide_overlay.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/test/plugins/browser_CTP_hide_overlay.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,76 @@
+var rootDir = getRootDirectory(gTestPath);
+const gTestRoot = rootDir;
+const gHttpTestRoot = rootDir.replace("chrome://mochitests/content/", "http://127.0.0.1:8888/");
+
+var gTestBrowser = null;
+var gNextTest = null;
+var gPluginHost = Components.classes["@mozilla.org/plugin/host;1"].getService(Components.interfaces.nsIPluginHost);
+
+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_DISABLED);
+
+  prepareTest(runAfterPluginBindingAttached(test1), gHttpTestRoot + "plugin_test.html");
+}
+
+function finishTest() {
+  clearAllPluginPermissions();
+  gTestBrowser.removeEventListener("load", pageLoad, true);
+  gBrowser.removeCurrentTab();
+  window.focus();
+  finish();
+}
+
+function pageLoad() {
+  // The plugin events are async dispatched and can come after the load event
+  // This just allows the events to fire before we then go on to test the states
+  executeSoon(gNextTest);
+}
+
+function prepareTest(nextTest, url) {
+  gNextTest = nextTest;
+  gTestBrowser.contentWindow.location = url;
+}
+
+// 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 function() {
+    let doc = gTestBrowser.contentDocument;
+    let elems = doc.getElementsByTagName('embed');
+    if (elems.length < 1) {
+      elems = doc.getElementsByTagName('object');
+    }
+    elems[0].clientTop;
+    executeSoon(func);
+  };
+}
+
+// Tests that the overlay can be hidded for disabled plugins using the close icon.
+function test1() {
+  var doc = gTestBrowser.contentDocument;
+  var plugin = doc.getElementById("test");
+  ok(plugin, "Test 1, Found plugin in page");
+  var overlay = doc.getAnonymousElementByAttribute(plugin, "anonid", "main");
+  ok(overlay.classList.contains("visible"), "Test 1, Plugin overlay should exist, not be hidden");
+  var closeIcon = doc.getAnonymousElementByAttribute(plugin, "anonid", "closeIcon")
+  EventUtils.synthesizeMouseAtCenter(closeIcon, {}, gTestBrowser.contentWindow);
+  var condition = function() !overlay.classList.contains("visible");
+  waitForCondition(condition, finishTest, "Test 1, Waited too long for the overlay to become invisible.");
+}