Remove state-specific appendTo*/begin* methods from VTTToken

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

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 47 matching lines @@
     explicit VTTTokenizer(const String& input);
 
     typedef VTTTokenizerState State;
 
     void reset();
 
     bool nextToken(VTTToken&);
 
     inline bool haveBufferedCharacterToken() { return false; }
 
-    inline void bufferCharacter(UChar character)
-    {
-        ASSERT(character != kEndOfFileMarker);
-        m_token->appendToCharacter(character);
-    }
-
     inline bool advanceAndEmitToken(SegmentedString& source, VTTTokenTypes::Type type)
     {
         source.advanceAndUpdateLineNumber();
         return emitToken(type);
     }
 
     inline bool emitToken(VTTTokenTypes::Type type)
     {
         m_token->setType(type);
         return true;
@@ skipping 13 matching lines @@
     StringBuilder m_buffer;
     SegmentedString m_input;
 
     // ://www.whatwg.org/specs/web-apps/current-work/#preprocessing-the-input-stream
     InputStreamPreprocessor<VTTTokenizer> m_inputStreamPreprocessor;
 };
 
 }
 
 #endif