Bug 1291946 - Call mozCapturedStreamXXX in onloadedmetadata callback. r=pehrsons

MozReview-Commit-ID: 6gLa4OYT9v2

--HG--
extra : rebase_source : 11d367a49f7e2151253000f2f7519a7e2dd9a11e

dom/media/test/test_streams_element_capture_createObjectURL.html

@@ -34,11 +34,10 @@ function startTest(test, token) {
   vout.token = token;
 
   v.src = test.name;
-  var stream = v.mozCaptureStreamUntilEnded();
-  is(stream.currentTime, 0, test.name + " stream initial currentTime");
-  vout.src = URL.createObjectURL(stream);
+  v.preload = "metadata"
+  var stream;
 
-  var checkEnded = function(test, vout, stream) { return function() {
+  var checkEnded = function() {
     is(stream.currentTime, vout.currentTime, test.name + " stream final currentTime");
     if (test.duration) {
       isGreaterThanOrEqualEps(vout.currentTime, test.duration,
@@ -52,12 +51,17 @@ function startTest(test, token) {
     vout.parentNode.removeChild(vout);
     URL.revokeObjectURL(vout.src);
     manager.finished(vout.token);
-  }}(test, vout, stream);
+  };
   vout.addEventListener("ended", checkEnded, false);
 
   document.body.appendChild(vout);
-  v.play();
-  vout.play();
+  v.onloadedmetadata = function () {
+    stream = v.mozCaptureStreamUntilEnded();
+    is(stream.currentTime, 0, test.name + " stream initial currentTime");
+    vout.src = URL.createObjectURL(stream);
+    v.play();
+    vout.play();
+  };
 }
 
 manager.runTests([getPlayableVideo(gSmallTests)], startTest);