Remove dynamic cast from DocumentPaser interface

sky/engine/core/dom/DocumentParser.h

 /*
  * Copyright (C) 2000 Peter Kelly (pmk@post.com)
  * Copyright (C) 2005, 2006 Apple Computer, Inc.
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  * Copyright (C) 2010 Google, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 10 matching lines @@
  *
  */
 
 #ifndef DocumentParser_h
 #define DocumentParser_h
 
 #include "mojo/public/cpp/system/core.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
+#include "wtf/text/TextPosition.h"
 
 namespace blink {
 
 class Document;
 class SegmentedString;
 class HTMLDocumentParser;
 class TextResourceDecoder;
 
 class DocumentParser : public RefCounted<DocumentParser> {
 public:
     virtual ~DocumentParser();
 
-    virtual HTMLDocumentParser* asHTMLDocumentParser() { return 0; }
+    virtual void parse(mojo::ScopedDataPipeConsumerHandle) = 0;
 
-    virtual void parse(mojo::ScopedDataPipeConsumerHandle) = 0;
-    virtual bool processingData() const { return false; }
-
-    // document() will return 0 after detach() is called.
-    Document* document() const { ASSERT(m_document); return m_document; }
+    virtual TextPosition textPosition() const = 0;
+    virtual void executeScriptsWaitingForResources() = 0;
+    virtual bool isWaitingForScripts() const = 0;
+    virtual bool isExecutingScript() const = 0;
 
     bool isParsing() const { return m_state == ParsingState; }
-    bool isStopping() const { return m_state == StoppingState; }
-    bool isStopped() const { return m_state >= StoppedState; }
-    bool isDetached() const { return m_state == DetachedState; }
-
-    // prepareToStop() is used when the EOF token is encountered and parsing is to be
-    // stopped normally.
-    virtual void prepareToStopParsing();
 
     // stopParsing() is used when a load is canceled/stopped.
     // stopParsing() is currently different from detach(), but shouldn't be.
     // It should NOT be ok to call any methods on DocumentParser after either
     // detach() or stopParsing() but right now only detach() will ASSERT.
     virtual void stopParsing();
 
     // Document is expected to detach the parser before releasing its ref.
     // After detach, m_document is cleared.  The parser will unwind its
     // callstacks, but not produce any more nodes.
     // It is impossible for the parser to touch the rest of WebCore after
     // detach is called.
     // Oilpan: We don't need to call detach when a Document is destructed.
     virtual void detach();
 
 protected:
     explicit DocumentParser(Document*);
 
+    // document() will return 0 after detach() is called.
+    Document* document() const { ASSERT(m_document); return m_document; }
+
+    virtual void prepareToStopParsing();
+
+    bool isStopping() const { return m_state == StoppingState; }
+    bool isStopped() const { return m_state >= StoppedState; }
+    bool isDetached() const { return m_state == DetachedState; }
+
 private:
     enum ParserState {
         ParsingState,
         StoppingState,
         StoppedState,
         DetachedState
     };
     ParserState m_state;
 
     // Every DocumentParser needs a pointer back to the document.
     // m_document will be 0 after the parser is stopped.
     Document* m_document;
 };
 
 } // namespace blink
 
 #endif // DocumentParser_h