Remove the logic for de-duplicating in-band text track cues

Source/core/html/track/InbandTextTrack.cpp

Index: Source/core/html/track/InbandTextTrack.cpp
diff --git a/Source/core/html/track/InbandTextTrack.cpp b/Source/core/html/track/InbandTextTrack.cpp
index b94ffb82468e4e4204ddfc38525d7850c6dd1b03..bd03d6415af580cd9ca10d65175749c11dbefc4e 100644
--- a/Source/core/html/track/InbandTextTrack.cpp
+++ b/Source/core/html/track/InbandTextTrack.cpp
@@ -97,11 +97,7 @@ void InbandTextTrack::addWebVTTCue(double start, double end, const WebString& id
 {
     RefPtr<VTTCue> cue = VTTCue::create(document(), start, end, content);
     cue->setId(id);
-    cue->setCueSettings(settings);
-
-    if (hasCue(cue.get()))
-        return;
-
+    cue->parseSettings(settings);
     addCue(cue);
 }