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diff --git a/Source/WebKit2/WebProcess/WebPage/ViewGestureGeometryCollector.h b/Source/WebKit2/WebProcess/WebPage/ViewGestureGeometryCollector.h
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+++ b/Source/WebKit2/WebProcess/WebPage/ViewGestureGeometryCollector.h
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+/*
+ * Copyright (C) 2013 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. 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 ViewGestureGeometryCollector_h
+#define ViewGestureGeometryCollector_h
+
+#include "MessageReceiver.h"
+#include <wtf/RunLoop.h>
+
+namespace WebCore {
+class FloatPoint;
+class FloatRect;
+class Node;
+}
+
+namespace WebKit {
+
+class WebPage;
+
+class ViewGestureGeometryCollector : private IPC::MessageReceiver {
+public:
+    ViewGestureGeometryCollector(WebPage&);
+    ~ViewGestureGeometryCollector();
+
+    void mainFrameDidLayout();
+
+private:
+    // IPC::MessageReceiver.
+    void didReceiveMessage(IPC::Connection&, IPC::Decoder&) override;
+
+    // Message handlers.
+    void collectGeometryForSmartMagnificationGesture(WebCore::FloatPoint origin);
+
+#if PLATFORM(MAC)
+    void collectGeometryForMagnificationGesture();
+    void setRenderTreeSizeNotificationThreshold(uint64_t size) { m_renderTreeSizeNotificationThreshold = size; }
+
+    void renderTreeSizeNotificationTimerFired();
+#endif
+
+    void dispatchDidCollectGeometryForSmartMagnificationGesture(WebCore::FloatPoint origin, WebCore::FloatRect targetRect, WebCore::FloatRect visibleContentRect, bool isReplacedElement, double viewportMinimumScale, double viewportMaximumScale);
+    void computeZoomInformationForNode(WebCore::Node&, WebCore::FloatPoint& origin, WebCore::FloatRect& renderRect, bool& isReplaced, double& viewportMinimumScale, double& viewportMaximumScale);
+
+    WebPage& m_webPage;
+
+#if PLATFORM(MAC)
+    uint64_t m_renderTreeSizeNotificationThreshold;
+#endif
+};
+
+} // namespace WebKit
+
+#endif // ViewGestureGeometryCollector