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diff --git a/Source/WebCore/webaudio/OfflineAudioDestinationNode.h b/Source/WebCore/webaudio/OfflineAudioDestinationNode.h
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+/*
+ * Copyright (C) 2011, 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:
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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 OfflineAudioDestinationNode_h
+#define OfflineAudioDestinationNode_h
+
+#include "AudioBuffer.h"
+#include "AudioDestinationNode.h"
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefPtr.h>
+#include <wtf/Threading.h>
+
+namespace WebCore {
+
+class AudioBus;
+class AudioContext;
+    
+class OfflineAudioDestinationNode : public AudioDestinationNode {
+public:
+    static PassRefPtr<OfflineAudioDestinationNode> create(AudioContext* context, AudioBuffer* renderTarget)
+    {
+        return adoptRef(new OfflineAudioDestinationNode(context, renderTarget));     
+    }
+
+    virtual ~OfflineAudioDestinationNode();
+    
+    // AudioNode   
+    virtual void initialize();
+    virtual void uninitialize();
+    
+    double sampleRate() const { return m_renderTarget->sampleRate(); }
+
+    void startRendering();
+    
+private:
+    OfflineAudioDestinationNode(AudioContext*, AudioBuffer* renderTarget);
+
+    // This AudioNode renders into this AudioBuffer.
+    RefPtr<AudioBuffer> m_renderTarget;
+    
+    // Temporary AudioBus for each render quantum.
+    OwnPtr<AudioBus> m_renderBus;
+    
+    // Rendering thread.
+    volatile ThreadIdentifier m_renderThread;
+    bool m_startedRendering;
+    static void* renderEntry(void* threadData);
+    void render();
+    
+    // For completion callback on main thread.
+    static void notifyCompleteDispatch(void* userData);
+    void notifyComplete();
+};
+
+} // namespace WebCore
+
+#endif // OfflineAudioDestinationNode_h