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diff --git a/Source/WebKit2/Platform/RunLoop.h b/Source/WebKit2/Platform/RunLoop.h
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+/*
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
+ * Portions Copyright (c) 2010 Motorola Mobility, 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 RunLoop_h
+#define RunLoop_h
+
+#include <wtf/HashMap.h>
+#include <wtf/PassOwnPtr.h>
+#include <wtf/ThreadSpecific.h>
+#include <wtf/Threading.h>
+#include <wtf/Vector.h>
+#if PLATFORM(GTK)
+typedef struct _GSource GSource;
+typedef struct _GMainLoop GMainLoop;
+typedef struct _GMainContext GMainContext;
+typedef int gboolean;
+#endif
+
+class WorkItem;
+
+class RunLoop {
+public:
+    // Must be called from the main thread.
+    static void initializeMainRunLoop();
+
+    static RunLoop* current();
+    static RunLoop* main();
+
+    void scheduleWork(PassOwnPtr<WorkItem>);
+
+    static void run();
+    void stop();
+
+    class TimerBase {
+        friend class RunLoop;
+    public:
+        TimerBase(RunLoop*);
+        virtual ~TimerBase();
+
+        void startRepeating(double repeatInterval) { start(repeatInterval, true); }
+        void startOneShot(double interval) { start(interval, false); }
+
+        void stop();
+        bool isActive() const;
+
+        virtual void fired() = 0;
+
+    private:
+        void start(double nextFireInterval, bool repeat);
+
+        RunLoop* m_runLoop;
+
+#if PLATFORM(WIN)
+        static void timerFired(RunLoop*, uint64_t ID);
+        uint64_t m_ID;
+        bool m_isRepeating;
+#elif PLATFORM(MAC)
+        static void timerFired(CFRunLoopTimerRef, void*);
+        CFRunLoopTimerRef m_timer;
+#elif PLATFORM(QT)
+        static void timerFired(RunLoop*, int ID);
+        int m_ID;
+        bool m_isRepeating;
+#elif PLATFORM(GTK)
+        static gboolean oneShotTimerFired(RunLoop::TimerBase*);
+        static gboolean repeatingTimerFired(RunLoop::TimerBase*);
+        void resetTimerSource();
+        GSource* m_timerSource;
+#endif
+    };
+
+    template <typename TimerFiredClass>
+    class Timer : public TimerBase {
+    public:
+        typedef void (TimerFiredClass::*TimerFiredFunction)();
+
+        Timer(RunLoop* runLoop, TimerFiredClass* o, TimerFiredFunction f)
+            : TimerBase(runLoop)
+            , m_object(o)
+            , m_function(f)
+        {
+        }
+
+    private:
+        virtual void fired() { (m_object->*m_function)(); }
+
+        TimerFiredClass* m_object;
+        TimerFiredFunction m_function;
+    };
+
+private:
+    friend class WTF::ThreadSpecific<RunLoop>;
+
+    RunLoop();
+    ~RunLoop();
+
+    void performWork();
+    void wakeUp();
+
+    Mutex m_workItemQueueLock;
+    Vector<WorkItem*> m_workItemQueue;
+
+#if PLATFORM(WIN)
+    static bool registerRunLoopMessageWindowClass();
+    static LRESULT CALLBACK RunLoopWndProc(HWND, UINT, WPARAM, LPARAM);
+    LRESULT wndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
+    HWND m_runLoopMessageWindow;
+
+    typedef HashMap<uint64_t, TimerBase*> TimerMap;
+    TimerMap m_activeTimers;
+#elif PLATFORM(MAC)
+    static void performWork(void*);
+    CFRunLoopRef m_runLoop;
+    CFRunLoopSourceRef m_runLoopSource;
+#elif PLATFORM(QT)
+    typedef HashMap<int, TimerBase*> TimerMap;
+    TimerMap m_activeTimers;
+    class TimerObject;
+    TimerObject* m_timerObject;
+#elif PLATFORM(GTK)
+public:
+    static gboolean queueWork(RunLoop*);
+    GMainLoop* mainLoop();
+private:
+    GMainContext* m_runLoopContext;
+    GMainLoop* m_runLoopMain;
+#endif
+};
+
+#endif // RunLoop_h