Defer setting type in the WebVTT tokenizer until emitting the token

Source/core/html/track/vtt/VTTParser.cpp

 /*
  * 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 367 matching lines @@
 
     RefPtr<DocumentFragment> fragment = DocumentFragment::create(m_document);
 
     if (cueText.isEmpty()) {
         fragment->parserAppendChild(Text::create(m_document, ""));
         return fragment;
     }
 
     m_currentNode = fragment;
 
-    OwnPtr<VTTTokenizer> tokenizer(VTTTokenizer::create());
+    VTTTokenizer tokenizer(cueText);
     m_token.clear();
     m_languageStack.clear();
 
-    SegmentedString content(cueText);
-    while (tokenizer->nextToken(content, m_token))
+    while (tokenizer.nextToken(m_token))
         constructTreeFromToken(m_document);
 
     return fragment.release();
 }
 
 PassRefPtr<DocumentFragment> VTTParser::createDocumentFragmentFromCueText(Document& document, const String& cueText)
 {
     VTTTreeBuilder treeBuilder(document);
     return treeBuilder.buildFromString(cueText);
 }
@@ skipping 187 matching lines @@
 }
 
 void VTTParser::skipWhiteSpace(const String& line, unsigned* position)
 {
     while (*position < line.length() && isASpace(line[*position]))
         (*position)++;
 }
 
 }