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diff --git a/Source/WebCore/html/track/LoadableTextTrack.h b/Source/WebCore/html/track/LoadableTextTrack.h
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+++ b/Source/WebCore/html/track/LoadableTextTrack.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 COMPUTER, INC. ``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 COMPUTER, INC. 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 LoadableTextTrack_h
+#define LoadableTextTrack_h
+
+#if ENABLE(VIDEO_TRACK)
+
+#include "TextTrack.h"
+#include "TextTrackLoader.h"
+#include <wtf/PassRefPtr.h>
+#include <wtf/Vector.h>
+
+namespace WebCore {
+
+class HTMLTrackElement;
+class LoadableTextTrack;
+
+class LoadableTextTrackClient : public TextTrackClient {
+public:
+    virtual ~LoadableTextTrackClient() { }
+    
+    virtual bool canLoadUrl(LoadableTextTrack*, const KURL&) { return false; }
+    virtual void loadingCompleted(LoadableTextTrack*, bool /* loadingFailed */) { }
+};
+
+class LoadableTextTrack : public TextTrack, private TextTrackLoaderClient {
+public:
+    static PassRefPtr<LoadableTextTrack> create(HTMLTrackElement* track, const String& kind, const String& label, const String& language, bool isDefault)
+    {
+        return adoptRef(new LoadableTextTrack(track, kind, label, language, isDefault));
+    }
+    virtual ~LoadableTextTrack();
+
+    void scheduleLoad(const KURL&);
+
+    virtual void clearClient();
+
+    size_t trackElementIndex();
+    HTMLTrackElement* trackElement() { return m_trackElement; }
+
+    virtual void fireCueChangeEvent();
+
+private:
+    // TextTrackLoaderClient
+    virtual bool shouldLoadCues(TextTrackLoader*) { return true; }
+    virtual void newCuesAvailable(TextTrackLoader*);
+    virtual void cueLoadingStarted(TextTrackLoader*);
+    virtual void cueLoadingCompleted(TextTrackLoader*, bool loadingFailed);
+
+    LoadableTextTrack(HTMLTrackElement*, const String& kind, const String& label, const String& language, bool isDefault);
+
+    void loadTimerFired(Timer<LoadableTextTrack>*);
+
+    HTMLTrackElement* m_trackElement;
+    Timer<LoadableTextTrack> m_loadTimer;
+    OwnPtr<TextTrackLoader> m_loader;
+    KURL m_url;
+    bool m_isDefault;
+};
+} // namespace WebCore
+
+#endif
+#endif