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diff --git a/WebCore/plugins/win/PluginMessageThrottlerWin.h b/WebCore/plugins/win/PluginMessageThrottlerWin.h
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+++ b/WebCore/plugins/win/PluginMessageThrottlerWin.h
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+/*
+ * Copyright (C) 2006, 2007, 2008 Apple Inc. All Rights Reserved.
+ * Copyright (C) 2008 Collabora, Ltd. 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 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 PluginMessageThrottlerWin_h
+#define PluginMessageThrottlerWin_h
+
+#include "Timer.h"
+
+#include <windows.h>
+
+namespace WebCore {
+    class PluginView;
+
+    struct PluginMessage {
+        HWND hWnd;
+        UINT msg;
+        WPARAM wParam;
+        LPARAM lParam;
+
+        struct PluginMessage* next;
+    };
+
+    class PluginMessageThrottlerWin {
+    public:
+        PluginMessageThrottlerWin(PluginView*);
+        ~PluginMessageThrottlerWin();
+
+        void appendMessage(HWND, UINT msg, WPARAM, LPARAM);
+
+    private:
+        void messageThrottleTimerFired(Timer<PluginMessageThrottlerWin>*);
+        PluginMessage* allocateMessage();
+        bool isInlineMessage(PluginMessage* message);
+        void freeMessage(PluginMessage* message);
+
+        PluginView* m_pluginView;
+        PluginMessage* m_back;
+        PluginMessage* m_front;
+
+        static const int NumInlineMessages = 4;
+        PluginMessage m_inlineMessages[NumInlineMessages];
+        PluginMessage* m_freeInlineMessages;
+
+        Timer<PluginMessageThrottlerWin> m_messageThrottleTimer;
+    };
+
+} // namespace WebCore
+
+#endif // PluginMessageThrottlerWin_h