Update TextTrackCue tests to use VTTCue where appropriate

LayoutTests/media/track/opera/interfaces/TextTrack/addCue.html

Index: LayoutTests/media/track/opera/interfaces/TextTrack/addCue.html
diff --git a/LayoutTests/media/track/opera/interfaces/TextTrack/addCue.html b/LayoutTests/media/track/opera/interfaces/TextTrack/addCue.html
index b0bb455bf70a4b59800f4b3ac46a17843241dc58..e6eb37ae0b760c05384c2a8835401bbb801bb8ec 100644
--- a/LayoutTests/media/track/opera/interfaces/TextTrack/addCue.html
+++ b/LayoutTests/media/track/opera/interfaces/TextTrack/addCue.html
@@ -11,14 +11,14 @@ setup(function(){
 test(function() {
     var t1 = video.addTextTrack('subtitles');
     var t2 = video.addTextTrack('subtitles');
-    var c1 = new TextTrackCue(0, 1, 'text1');
+    var c1 = new VTTCue(0, 1, 'text1');
     t1.addCue(c1);
     t2.addCue(c1);
     assert_equals(c1.track, t2);
 }, document.title+', adding a cue to two different tracks');
 test(function() {
     var t1 = video.addTextTrack('subtitles');
-    var c1 = new TextTrackCue(0, 1, 'text1');
+    var c1 = new VTTCue(0, 1, 'text1');
     t1.addCue(c1);
     assert_equals(c1.track, t1);
     t1.addCue(c1);
@@ -27,7 +27,7 @@ test(function() {
 test(function() {
     var t1 = video.addTextTrack('subtitles');
     var t2 = video.addTextTrack('subtitles');
-    var c1 = new TextTrackCue(0, 1, 'text1');
+    var c1 = new VTTCue(0, 1, 'text1');
     t1.addCue(c1);
     assert_equals(c1.track, t1);
     t1.removeCue(c1);
@@ -37,7 +37,7 @@ test(function() {
 }, document.title+', adding a removed cue to a different track');
 test(function() {
     var t1 = video.addTextTrack('subtitles');
-    var c1 = new TextTrackCue(0, 1, 'text1');
+    var c1 = new VTTCue(0, 1, 'text1');
     t1.addCue(c1);
     assert_equals(t1.cues.length, 1, 't1.cues.length after first addition');
     t1.removeCue(c1);