Remove the TextTrackCue constructor

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

Index: LayoutTests/media/track/text-track-cue-constructor.html
diff --git a/LayoutTests/media/track/text-track-cue-constructor.html b/LayoutTests/media/track/text-track-cue-constructor.html
index 87f9408ebcccdb660be73e3de9f9cfc498360f10..79ef414880b5f6f1ed0389b67b03e445d94f8ed2 100644
--- a/LayoutTests/media/track/text-track-cue-constructor.html
+++ b/LayoutTests/media/track/text-track-cue-constructor.html
@@ -14,20 +14,11 @@
             }, "TextTrackCue and VTTCue are separate interfaces");
             test(function()
             {
-	        var cue = new TextTrackCue(0, 0, "");
-                assert_true(cue instanceof TextTrackCue);
-                assert_true(cue instanceof VTTCue);
-            }, "TextTrackCue constructor returns a VTTCue");
-            test(function()
-            {
-                try { 
-                    new TextTrackCue(0);
-                    assert_unreached("Expected a TypeError");
-                } catch (e) {
-                    assert_true(e instanceof TypeError);
-                    assert_equals(e.message, "Failed to construct 'TextTrackCue': 3 arguments required, but only 1 present.");
-                }
-            }, "When not fully applied, TextTrackCue constructor throws a TypeError");
+                assert_throws(new TypeError(), function()
+                {
+                    new TextTrackCue(0, 0, "");
+                });
+            }, "TextTrackCue constructor should not be supported");
         </script>
     </body>
 </html>