Fix BiDi paragraph embedding level resolution for VTTCue

Source/core/html/track/vtt/VTTCue.h

 /*
  * Copyright (c) 2013, Opera Software ASA. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 137 matching lines @@
     PassRefPtr<VTTCueBox> displayTreeInternal();
     PassRefPtr<TextTrackCueBox> getDisplayTree(const IntSize& videoSize);
 
     virtual void cueDidChange() OVERRIDE;
 
     void createVTTNodeTree();
     void copyVTTNodeToDOMTree(ContainerNode* vttNode, ContainerNode* root);
 
     std::pair<double, double> getPositionCoordinates() const;
 
-    void determineTextDirection();
     void calculateDisplayParameters();
 
     enum CueSetting {
         None,
         Vertical,
         Line,
         Position,
         Size,
         Align,
         RegionId
@@ skipping 28 matching lines @@
 
 inline VTTCue* toVTTCue(TextTrackCue* cue)
 {
     // VTTCue is currently the only TextTrackCue subclass.
     return static_cast<VTTCue*>(cue);
 }
 
 } // namespace WebCore
 
 #endif