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diff --git a/Source/WebCore/page/SuspendableTimer.h b/Source/WebCore/page/SuspendableTimer.h
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+++ b/Source/WebCore/page/SuspendableTimer.h
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+/*
+ * Copyright (C) 2008 Apple 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. ``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 SuspendableTimer_h
+#define SuspendableTimer_h
+
+#include "ActiveDOMObject.h"
+#include "Timer.h"
+
+namespace WebCore {
+
+class SuspendableTimer : public TimerBase, public ActiveDOMObject {
+public:
+    SuspendableTimer(ScriptExecutionContext*);
+    virtual ~SuspendableTimer();
+
+    // ActiveDOMObject
+    virtual bool hasPendingActivity() const;
+    virtual void stop();
+    virtual bool canSuspend() const;
+    virtual void suspend(ReasonForSuspension);
+    virtual void resume();
+
+private:
+    virtual void fired() = 0;
+
+    double m_nextFireInterval;
+    double m_repeatInterval;
+#if !ASSERT_DISABLED
+    bool m_suspended;
+#endif
+};
+
+} // namespace WebCore
+
+#endif // SuspendableTimer_h
+