Remove dynamic cast from DocumentPaser interface

sky/engine/core/html/parser/HTMLDocumentParser.cpp

 /*
  * Copyright (C) 2010 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:
  * 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 125 matching lines @@
     ASSERT(isStopping());
     ASSERT(!hasInsertionPoint() || m_haveBackgroundParser);
     end();
 }
 
 bool HTMLDocumentParser::isParsingFragment() const
 {
     return m_treeBuilder->isParsingFragment();
 }
 
-bool HTMLDocumentParser::processingData() const
-{
-    return isScheduledForResume() || inPumpSession() || m_haveBackgroundParser;
-}
-
 bool HTMLDocumentParser::isScheduledForResume() const
 {
     return m_parserScheduler && m_parserScheduler->isScheduledForResume();
 }
 
 // Used by HTMLParserScheduler
 void HTMLDocumentParser::resumeParsingAfterYield()
 {
     // pumpTokenizer can cause this parser to be detached from the Document,
     // but we need to ensure it isn't deleted yet.
@@ skipping 265 matching lines @@
 {
     if (!m_scriptRunner.hasPendingScripts())
         return;
     RefPtr<HTMLDocumentParser> protect(this);
     m_scriptRunner.executePendingScripts();
     if (!isWaitingForScripts())
         resumeParsingAfterScriptExecution();
 }
 
 }