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diff --git a/WebCore/html/PreloadScanner.h b/WebCore/html/PreloadScanner.h
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+++ b/WebCore/html/PreloadScanner.h
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+/*
+ * Copyright (C) 2008 Apple 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
+ *     documentation and/or other materials provided with the distribution.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#ifndef PreloadScanner_h
+#define PreloadScanner_h
+
+#include "AtomicString.h"
+#include "SegmentedString.h"
+#include <wtf/Noncopyable.h>
+#include <wtf/Vector.h>
+
+namespace WebCore {
+    
+    class CachedResource;
+    class CachedResourceClient;
+    class Document;
+    
+    class PreloadScanner : Noncopyable {
+    public:
+        PreloadScanner(Document*);
+        ~PreloadScanner();
+        void begin();
+        void write(const SegmentedString&);
+        void end();
+        bool inProgress() const { return m_inProgress; }
+        
+        bool inBody() const;
+        
+        static unsigned consumeEntity(SegmentedString&, bool& notEnoughCharacters);
+        
+    private:
+        void tokenize(const SegmentedString&);
+        void reset();
+        
+        void emitTag();
+        void emitCharacter(UChar);
+        
+        void tokenizeCSS(UChar);
+        void emitCSSRule();
+        
+        void processAttribute();
+
+        
+        void clearLastCharacters();
+        void rememberCharacter(UChar);
+        bool lastCharactersMatch(const char*, unsigned count) const;
+        
+        bool m_inProgress;
+        SegmentedString m_source;
+        
+        enum State {
+            Data,
+            EntityData,
+            TagOpen,
+            CloseTagOpen,
+            TagName,
+            BeforeAttributeName,
+            AttributeName,
+            AfterAttributeName,
+            BeforeAttributeValue,
+            AttributeValueDoubleQuoted,
+            AttributeValueSingleQuoted,
+            AttributeValueUnquoted,
+            EntityInAttributeValue,
+            BogusComment,
+            MarkupDeclarationOpen,
+            CommentStart,
+            CommentStartDash,
+            Comment,
+            CommentEndDash,
+            CommentEnd
+        };
+        State m_state;
+        bool m_escape;
+        enum ContentModel {
+            PCDATA,
+            RCDATA,
+            CDATA,
+            PLAINTEXT
+        };
+        ContentModel m_contentModel;
+        unsigned m_commentPos;
+        State m_stateBeforeEntityInAttributeValue;
+        
+        static const unsigned lastCharactersBufferSize = 8;
+        UChar m_lastCharacters[lastCharactersBufferSize];
+        unsigned m_lastCharacterIndex;
+        
+        bool m_closeTag;
+        Vector<UChar, 32> m_tagName;
+        Vector<UChar, 32> m_attributeName;
+        Vector<UChar> m_attributeValue;
+        AtomicString m_lastStartTag;
+        
+        String m_urlToLoad;
+        String m_charset;
+        bool m_linkIsStyleSheet;
+        
+        enum CSSState {
+            CSSInitial,
+            CSSMaybeComment,
+            CSSComment,
+            CSSMaybeCommentEnd,
+            CSSRuleStart,
+            CSSRule,
+            CSSAfterRule,
+            CSSRuleValue,
+            CSSAferRuleValue
+        };
+        CSSState m_cssState;
+        Vector<UChar, 16> m_cssRule;
+        Vector<UChar> m_cssRuleValue;
+        
+        double m_timeUsed;
+        
+        bool m_bodySeen;
+        Document* m_document;
+    };
+
+}
+
+#endif