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diff --git a/chromium/third_party/WebKit/Source/web/AsyncFileWriterChromium.h b/chromium/third_party/WebKit/Source/web/AsyncFileWriterChromium.h
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+/*
+ * Copyright (C) 2010 Google 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER OR 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 AsyncFileWriterChromium_h
+#define AsyncFileWriterChromium_h
+
+#include "WebFileWriterClient.h"
+#include "modules/filesystem/AsyncFileWriter.h"
+#include "public/platform/WebFileError.h"
+#include "wtf/PassOwnPtr.h"
+
+namespace WebKit {
+class WebFileWriter;
+}
+
+namespace WebCore {
+
+class Blob;
+class AsyncFileWriterClient;
+
+class AsyncFileWriterChromium : public AsyncFileWriter, public WebKit::WebFileWriterClient {
+public:
+    static PassOwnPtr<AsyncFileWriterChromium> create(AsyncFileWriterClient*);
+    virtual ~AsyncFileWriterChromium();
+
+    void setWebFileWriter(PassOwnPtr<WebKit::WebFileWriter> writer);
+
+    // FileWriter
+    virtual void write(long long position, Blob* data);
+    virtual void truncate(long long length);
+    virtual void abort();
+
+    // WebFileWriterClient
+    virtual void didWrite(long long bytes, bool complete);
+    virtual void didTruncate();
+    virtual void didFail(WebKit::WebFileError);
+
+private:
+    explicit AsyncFileWriterChromium(AsyncFileWriterClient*);
+
+    OwnPtr<WebKit::WebFileWriter> m_writer;
+    AsyncFileWriterClient* m_client;
+};
+
+} // namespace
+
+#endif // AsyncFileWriterChromium_h