Add MediaStream.active attribute

LayoutTests/fast/mediastream/MediaStreamConstructor.html

Index: LayoutTests/fast/mediastream/MediaStreamConstructor.html
diff --git a/LayoutTests/fast/mediastream/MediaStreamConstructor.html b/LayoutTests/fast/mediastream/MediaStreamConstructor.html
index 98ebca9cd6fbb85169e815253f62e52183995287..324c389253cb938cf1e131bd89a62b1f5f5197c8 100644
--- a/LayoutTests/fast/mediastream/MediaStreamConstructor.html
+++ b/LayoutTests/fast/mediastream/MediaStreamConstructor.html
@@ -85,7 +85,7 @@ function testConstructor(s) {
     verifyStream(new webkitMediaStream([s.getAudioTracks()[0], s.getVideoTracks()[0]]), 1, 1);
     verifyStream(new webkitMediaStream([s.getVideoTracks()[0], s.getAudioTracks()[0], s.getVideoTracks()[0]]), 1, 1);
 
-    s.onended = function () {
+    s.oninactive = function () {
         verifyStream(new webkitMediaStream([s.getAudioTracks()[0]]), 0, 0);
         verifyStream(new webkitMediaStream([s.getVideoTracks()[0]]), 0, 0);
         verifyStream(new webkitMediaStream([s.getAudioTracks()[0], s.getVideoTracks()[0]]), 0, 0);
@@ -109,6 +109,11 @@ function verifyStream(s, numAudioTracks, numVideoTracks) {
     shouldBe('newStream.getAudioTracks().length', 'nAudio');
     shouldBe('newStream.getVideoTracks().length', 'nVideo');
 
+    if (!nAudio && !nVideo)
+        shouldBe('newStream.active', 'false');
+    else
+        shouldBe('newStream.active', 'true');
+
     shouldBeTrue('checkIdAttribute(newStream.id)');
 }