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diff --git a/Source/WebCore/page/FrameActionScheduler.h b/Source/WebCore/page/FrameActionScheduler.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:
+ *  * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``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 FrameActionScheduler_h
+#define FrameActionScheduler_h
+
+#include <wtf/FastAllocBase.h>
+#include <wtf/Noncopyable.h>
+#include <wtf/OwnPtr.h>
+#include <wtf/PassOwnPtr.h>
+#include <wtf/Vector.h>
+
+namespace WebCore {
+
+class Node;
+class Event;
+
+class FrameAction {
+    WTF_MAKE_FAST_ALLOCATED;
+    WTF_MAKE_NONCOPYABLE(FrameAction);
+public:
+    FrameAction() {}
+    virtual ~FrameAction() {}
+    virtual void fire() = 0;
+};
+
+class FrameActionScheduler {
+public:
+    FrameActionScheduler();
+    ~FrameActionScheduler();
+
+    bool isEmpty() const;
+    bool isScheduled() const { return 0 < m_enqueueActions; }
+    void clear();
+    void pause();
+    void resume();
+
+    void scheduleAction(PassOwnPtr<FrameAction>);
+    void scheduleEvent(PassRefPtr<Event>, PassRefPtr<Node>);
+
+private:
+    void dispatch();
+
+    unsigned m_enqueueActions;
+    Vector< OwnPtr<FrameAction> > m_scheduledActions;
+};
+
+} // namespace WebCore
+
+#endif // FrameActionScheduler_h