Change checkComplete in test_referer.html to check whether all tests are complete, rather than just the last. (Bug 600458) r=doublec a=test-fix

content/media/test/test_referer.html

@@ -21,15 +21,14 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=584480
 var media = [];
 
 function checkComplete() {
-  complete = true;
   for (var i=0; i<media.length; ++i) {
-    complete = media[i]._complete;
+    if (!media[i]._complete) {
+      return;
+    }
   }
 
-  if (complete) {
   SimpleTest.finish();
 }
-}
  
 function loadError(evt) {
   // Prevent mochitest's onerror handler catching the 'error' event on bubble.