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diff --git a/Source/WebKit2/UIProcess/gtk/GestureController.h b/Source/WebKit2/UIProcess/gtk/GestureController.h
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+++ b/Source/WebKit2/UIProcess/gtk/GestureController.h
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+/*
+ * Copyright (C) 2014 Igalia S.L.
+ *
+ * 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 GestureController_h
+#define GestureController_h
+
+#if HAVE(GTK_GESTURES)
+
+#include <WebCore/FloatPoint.h>
+#include <wtf/Noncopyable.h>
+#include <wtf/RunLoop.h>
+#include <wtf/glib/GRefPtr.h>
+
+typedef union _GdkEvent GdkEvent;
+typedef struct _GdkEventSequence GdkEventSequence;
+typedef struct _GtkGesture GtkGesture;
+
+namespace WebKit {
+class WebPageProxy;
+
+class GestureController {
+    WTF_MAKE_NONCOPYABLE(GestureController);
+
+public:
+    GestureController(WebPageProxy&);
+
+    bool isProcessingGestures() const;
+    bool handleEvent(const GdkEvent*);
+
+private:
+    class Gesture {
+    public:
+        bool isActive() const;
+        void handleEvent(const GdkEvent*);
+
+    protected:
+        Gesture(GtkGesture*, WebPageProxy&);
+
+        GRefPtr<GtkGesture> m_gesture;
+        WebPageProxy& m_page;
+    };
+
+    class DragGesture final : public Gesture {
+    public:
+        DragGesture(WebPageProxy&);
+
+    private:
+        void handleDrag(const GdkEvent*, double x, double y);
+        void handleTap(const GdkEvent*);
+        void longPressFired();
+
+        static void begin(DragGesture*, double x, double y, GtkGesture*);
+        static void update(DragGesture*, double x, double y, GtkGesture*);
+        static void end(DragGesture*, GdkEventSequence*, GtkGesture*);
+
+        WebCore::FloatPoint m_start;
+        WebCore::FloatPoint m_offset;
+        RunLoop::Timer<DragGesture> m_longPressTimeout;
+        GRefPtr<GtkGesture> m_longPress;
+        bool m_inDrag;
+    };
+
+    class ZoomGesture final : public Gesture {
+    public:
+        ZoomGesture(WebPageProxy&);
+
+    private:
+        WebCore::IntPoint center() const;
+        void handleZoom();
+
+        static void begin(ZoomGesture*, GdkEventSequence*, GtkGesture*);
+        static void scaleChanged(ZoomGesture*, double scale, GtkGesture*);
+
+        gdouble m_initialScale;
+        gdouble m_scale;
+        WebCore::IntPoint m_initialPoint;
+        WebCore::IntPoint m_viewPoint;
+        RunLoop::Timer<ZoomGesture> m_idle;
+    };
+
+    DragGesture m_dragGesture;
+    ZoomGesture m_zoomGesture;
+};
+
+} // namespace WebKit
+
+#endif // HAVE(GTK_GESTURES)
+
+#endif // GestureController_h