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diff --git a/chromium/third_party/WebKit/Source/web/WorkerAsyncFileWriterChromium.h b/chromium/third_party/WebKit/Source/web/WorkerAsyncFileWriterChromium.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 WorkerAsyncFileWriterChromium_h
+#define WorkerAsyncFileWriterChromium_h
+
+#include "modules/filesystem/AsyncFileWriter.h"
+#include "wtf/PassOwnPtr.h"
+
+namespace WebKit {
+    class WebFileSystem;
+    class WebFileWriter;
+    class WebURL;
+    class WorkerFileWriterCallbacksBridge;
+}
+
+namespace WTF {
+    class String;
+}
+using WTF::String;
+
+namespace WebCore {
+
+class AsyncFileSystem;
+class AsyncFileWriterClient;
+class Blob;
+class WorkerGlobalScope;
+
+class WorkerAsyncFileWriterChromium : public AsyncFileWriter {
+public:
+    enum WriterType {
+        Asynchronous,
+        Synchronous,
+    };
+
+    static PassOwnPtr<WorkerAsyncFileWriterChromium> create(WebKit::WebFileSystem* webFileSystem, const WebKit::WebURL& path, WorkerGlobalScope* workerGlobalScope, AsyncFileWriterClient* client, WriterType type)
+    {
+        return adoptPtr(new WorkerAsyncFileWriterChromium(webFileSystem, path, workerGlobalScope, client, type));
+    }
+    ~WorkerAsyncFileWriterChromium();
+
+    bool waitForOperationToComplete();
+
+    // FileWriter
+    virtual void write(long long position, Blob* data);
+    virtual void truncate(long long length);
+    virtual void abort();
+
+private:
+
+    WorkerAsyncFileWriterChromium(WebKit::WebFileSystem*, const WebKit::WebURL& path, WorkerGlobalScope*, AsyncFileWriterClient*, WriterType);
+    RefPtr<WebKit::WorkerFileWriterCallbacksBridge> m_bridge;
+};
+
+} // namespace
+
+#endif // AsyncFileWriterChromium_h