MediaStream should fire ended event when all tracks are ended

LayoutTests/fast/mediastream/MediaStream-onended.html

Index: LayoutTests/fast/mediastream/MediaStream-onended.html
diff --git a/LayoutTests/fast/mediastream/LocalMediaStream-onended.html b/LayoutTests/fast/mediastream/MediaStream-onended.html
similarity index 91%
copy from LayoutTests/fast/mediastream/LocalMediaStream-onended.html
copy to LayoutTests/fast/mediastream/MediaStream-onended.html
index cad10dc1cf14fc2136e5a4795f14ddcd090a3e5a..153f5b575f519773953e3a2be30a0495f44c6d04 100644
--- a/LayoutTests/fast/mediastream/LocalMediaStream-onended.html
+++ b/LayoutTests/fast/mediastream/MediaStream-onended.html
@@ -8,7 +8,7 @@
 <p id="description"></p>
 <div id="console"></div>
 <script>
-description("Tests LocalMediaStream::onended callback.");
+description("Tests MediaStream::onended callback.");
 
 function error() {
     testFailed('Stream generation failed.');
@@ -33,11 +33,11 @@ function streamEnded() {
 }
 
 function gotStream(s) {
-    stream = s;
+    stream = new webkitMediaStream(s);
     shouldBeFalse('stream.ended');
     try {
         stream.onended = streamEnded;
-        stream.stop();
+        s.stop();
     } catch (e) {
         testFailed('LocalMediaStream threw exception :' + e);
         finishJSTest();