Bug 680275 - Ensure that the video load begins before adding the video to a new document. r=roc

content/media/test/test_delay_load.html

@@ -96,14 +96,16 @@ v.load();
 // Load and move to another document.
 netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
 v = createVideo(test.name, test.type, "4");
+v.onloadstart = function(e) {
+  // Opening a new window to do this is a bit annoying, but if we use an iframe here,
+  // delaying of the iframe's load event might interfere with the firing of our load event
+  // in some confusing way. So it's simpler just to open another window.
+  var w = window.open("", "testWindow", "width=400,height=400");
+  w.document.body.appendChild(v);
+  testWindows.push(w);
+};
 v.load(); // load started while in this document, this doc's load will block until
-            // the video's finished loading (in the other document).
+          // the video's finished loading (in the other document).
-// Opening a new window to do this is a bit annoying, but if we use an iframe here,
-// delaying of the iframe's load event might interfere with the firing of our load event
-// in some confusing way. So it's simpler just to open another window.
-var w = window.open("", "testWindow", "width=400,height=400");
-w.document.body.appendChild(v);
-testWindows.push(w);
 
 if (gRegisteredElements.length > 0) {
   SimpleTest.waitForExplicitFinish();