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diff --git a/WebCore/loader/DocumentWriter.h b/WebCore/loader/DocumentWriter.h
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+/*
+ * Copyright (C) 2010. Adam Barth. 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 Adam Barth. ("Adam Barth") 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 DocumentWriter_h
+#define DocumentWriter_h
+
+#include "KURL.h"
+#include "PlatformString.h"
+
+namespace WebCore {
+
+class Document;
+class Frame;
+class SecurityOrigin;
+class TextResourceDecoder;
+
+class DocumentWriter : public Noncopyable {
+public:
+    DocumentWriter(Frame*);
+
+    void replaceDocument(const String&);
+
+    void begin();
+    void begin(const KURL&, bool dispatchWindowObjectAvailable = true, SecurityOrigin* forcedSecurityOrigin = 0);
+    void addData(const char* string, int length = -1, bool flush = false);
+    void addData(const String&);
+    void end();
+    void endIfNotLoadingMainResource();
+    void clear();
+
+    String encoding() const;
+    void setEncoding(const String& encoding, bool userChosen);
+
+    // FIXME: It's really unforunate to need to expose this piece of state.
+    // I suspect a better design is to disentangle user-provided encodings,
+    // default encodings, and the decoding we're currently using.
+    String deprecatedFrameEncoding() const;
+
+    const String& mimeType() const { return m_mimeType; }
+    void setMIMEType(const String& type) { m_mimeType = type; }
+
+    void setDecoder(TextResourceDecoder*);
+
+private:
+    PassRefPtr<Document> createDocument();
+
+    Frame* m_frame;
+
+    bool m_receivedData;
+    String m_mimeType;
+
+    bool m_encodingWasChosenByUser;
+    String m_encoding;
+    RefPtr<TextResourceDecoder> m_decoder;
+};
+
+} // namespace WebCore
+
+#endif // DocumentWriter_h