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diff --git a/Source/WebCore/css/CSSStyleSheet.h b/Source/WebCore/css/CSSStyleSheet.h
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+/*
+ * (C) 1999-2003 Lars Knoll (knoll@kde.org)
+ * Copyright (C) 2004, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
+ *
+ * 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 CSSStyleSheet_h
+#define CSSStyleSheet_h
+
+#include "CSSRuleList.h"
+#include "StyleSheet.h"
+
+namespace WebCore {
+
+struct CSSNamespace;
+class CSSParser;
+class CSSRule;
+class CachedResourceLoader;
+class Document;
+
+typedef int ExceptionCode;
+
+class CSSStyleSheet : public StyleSheet {
+public:
+    static PassRefPtr<CSSStyleSheet> create()
+    {
+        return adoptRef(new CSSStyleSheet(static_cast<CSSStyleSheet*>(0), String(), KURL(), String()));
+    }
+    static PassRefPtr<CSSStyleSheet> create(Node* ownerNode)
+    {
+        return adoptRef(new CSSStyleSheet(ownerNode, String(), KURL(), String()));
+    }
+    static PassRefPtr<CSSStyleSheet> create(Node* ownerNode, const String& originalURL, const KURL& finalURL)
+    {
+        return adoptRef(new CSSStyleSheet(ownerNode, originalURL, finalURL, String()));
+    }
+    static PassRefPtr<CSSStyleSheet> create(Node* ownerNode, const String& originalURL, const KURL& finalURL, const String& charset)
+    {
+        return adoptRef(new CSSStyleSheet(ownerNode, originalURL, finalURL, charset));
+    }
+    static PassRefPtr<CSSStyleSheet> create(CSSRule* ownerRule, const String& originalURL, const KURL& finalURL, const String& charset)
+    {
+        return adoptRef(new CSSStyleSheet(ownerRule, originalURL, finalURL, charset));
+    }
+    static PassRefPtr<CSSStyleSheet> createInline(Node* ownerNode, const KURL& finalURL)
+    {
+        return adoptRef(new CSSStyleSheet(ownerNode, finalURL.string(), finalURL, String()));
+    }
+
+    virtual ~CSSStyleSheet();
+
+    CSSRule* ownerRule() const;
+    PassRefPtr<CSSRuleList> cssRules(bool omitCharsetRules = false);
+    unsigned insertRule(const String& rule, unsigned index, ExceptionCode&);
+    void deleteRule(unsigned index, ExceptionCode&);
+
+    // IE Extensions
+    PassRefPtr<CSSRuleList> rules() { return cssRules(true); }
+    int addRule(const String& selector, const String& style, int index, ExceptionCode&);
+    int addRule(const String& selector, const String& style, ExceptionCode&);
+    void removeRule(unsigned index, ExceptionCode& ec) { deleteRule(index, ec); }
+
+    void addNamespace(CSSParser*, const AtomicString& prefix, const AtomicString& uri);
+    const AtomicString& determineNamespace(const AtomicString& prefix);
+
+    virtual void styleSheetChanged();
+
+    virtual bool parseString(const String&, bool strict = true);
+
+    bool parseStringAtLine(const String&, bool strict, int startLineNumber);
+
+    virtual bool isLoading();
+
+    virtual void checkLoaded();
+
+    Document* document() { return m_document; }
+
+    const String& charset() const { return m_charset; }
+
+    bool loadCompleted() const { return m_loadCompleted; }
+
+    virtual KURL completeURL(const String& url) const;
+    virtual void addSubresourceStyleURLs(ListHashSet<KURL>&);
+
+    void setStrictParsing(bool b) { m_strictParsing = b; }
+    bool useStrictParsing() const { return m_strictParsing; }
+
+    void setIsUserStyleSheet(bool b) { m_isUserStyleSheet = b; }
+    bool isUserStyleSheet() const { return m_isUserStyleSheet; }
+    void setHasSyntacticallyValidCSSHeader(bool b) { m_hasSyntacticallyValidCSSHeader = b; }
+    bool hasSyntacticallyValidCSSHeader() const { return m_hasSyntacticallyValidCSSHeader; }
+
+private:
+    CSSStyleSheet(Node* ownerNode, const String& originalURL, const KURL& finalURL, const String& charset);
+    CSSStyleSheet(CSSStyleSheet* parentSheet, const String& originalURL, const KURL& finalURL, const String& charset);
+    CSSStyleSheet(CSSRule* ownerRule, const String& originalURL, const KURL& finalURL, const String& charset);
+
+    virtual bool isCSSStyleSheet() const { return true; }
+    virtual String type() const { return "text/css"; }
+
+    Document* m_document;
+    OwnPtr<CSSNamespace> m_namespaces;
+    String m_charset;
+    bool m_loadCompleted : 1;
+    bool m_strictParsing : 1;
+    bool m_isUserStyleSheet : 1;
+    bool m_hasSyntacticallyValidCSSHeader : 1;
+};
+
+} // namespace
+
+#endif