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diff --git a/WebCore/dom/DocumentParser.h b/WebCore/dom/DocumentParser.h
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+++ b/WebCore/dom/DocumentParser.h
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+/*
+ * Copyright (C) 2000 Peter Kelly (pmk@post.com)
+ * Copyright (C) 2005, 2006 Apple Computer, Inc.
+ * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
+ *
+ * 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.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef DocumentParser_h
+#define DocumentParser_h
+
+namespace WebCore {
+
+    class LegacyHTMLTreeConstructor;
+    class HTMLDocumentParser;
+    class SegmentedString;
+    class XSSAuditor;
+
+    class DocumentParser : public Noncopyable {
+    public:
+        virtual ~DocumentParser() { }
+
+        // Script output must be prepended, while new data
+        // received during executing a script must be appended, hence the
+        // extra bool to be able to distinguish between both cases.
+        // document.write() always uses false, while the loader uses true.
+        virtual void write(const SegmentedString&, bool appendData) = 0;
+        virtual void finish() = 0;
+        virtual bool isWaitingForScripts() const = 0;
+        virtual void stopParsing() { m_parserStopped = true; }
+        virtual bool processingData() const { return false; }
+        virtual int executingScript() const { return 0; }
+
+        virtual bool wantsRawData() const { return false; }
+        virtual bool writeRawData(const char* /*data*/, int /*length*/) { return false; }
+
+        bool inViewSourceMode() const { return m_inViewSourceMode; }
+        void setInViewSourceMode(bool mode) { m_inViewSourceMode = mode; }
+
+        virtual bool wellFormed() const { return true; }
+
+        virtual int lineNumber() const { return -1; }
+        virtual int columnNumber() const { return -1; }
+
+        virtual void executeScriptsWaitingForStylesheets() {}
+
+        virtual LegacyHTMLTreeConstructor* htmlTreeConstructor() const { return 0; }
+        virtual HTMLDocumentParser* asHTMLDocumentParser() { return 0; }
+
+        XSSAuditor* xssAuditor() const { return m_XSSAuditor; }
+        void setXSSAuditor(XSSAuditor* auditor) { m_XSSAuditor = auditor; }
+
+    protected:
+        DocumentParser(bool viewSourceMode = false)
+            : m_parserStopped(false)
+            , m_inViewSourceMode(viewSourceMode)
+            , m_XSSAuditor(0)
+        {
+        }
+
+        // The parser has buffers, so parsing may continue even after
+        // it stops receiving data. We use m_parserStopped to stop the parser
+        // even when it has buffered data.
+        bool m_parserStopped;
+        bool m_inViewSourceMode;
+
+        // The XSSAuditor associated with this document parser.
+        XSSAuditor* m_XSSAuditor;
+    };
+
+} // namespace WebCore
+
+#endif // DocumentParser_h