Use the VTTCue constructor instead of TextTrackCue in test

LayoutTests/media/track/text-track-cue-exceptions.html

Index: LayoutTests/media/track/text-track-cue-exceptions.html
diff --git a/LayoutTests/media/track/text-track-cue-exceptions.html b/LayoutTests/media/track/text-track-cue-exceptions.html
index 66cf92aa00efe1e6239760a491aa67a7ff55f85b..37546c0249ef7c34e3e89631e2c3c76ba9f50e43 100644
--- a/LayoutTests/media/track/text-track-cue-exceptions.html
+++ b/LayoutTests/media/track/text-track-cue-exceptions.html
@@ -7,7 +7,7 @@
     <script>
         description("Verify that TextTrackCue exceptions are properly messaged to developers.");
 
-        var cue = new TextTrackCue(0, 0, "Test.");
+        var cue = new VTTCue(0, 0, "Test.");
 
         function testInfinityAndNaN(property) {
             shouldThrow("cue." + property + " = Number.NaN;");