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diff --git a/Source/WebKit2/WebProcess/WebPage/ViewGestureGeometryCollector.cpp b/Source/WebKit2/WebProcess/WebPage/ViewGestureGeometryCollector.cpp
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+++ b/Source/WebKit2/WebProcess/WebPage/ViewGestureGeometryCollector.cpp
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+/*
+ * Copyright (C) 2013, 2014 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.
+ */
+
+#include "config.h"
+#include "ViewGestureGeometryCollector.h"
+
+#include "ViewGestureGeometryCollectorMessages.h"
+#include "WebCoreArgumentCoders.h"
+#include "WebFrame.h"
+#include "WebPage.h"
+#include "WebProcess.h"
+#include <WebCore/Frame.h>
+#include <WebCore/FrameView.h>
+#include <WebCore/HTMLImageElement.h>
+#include <WebCore/HitTestResult.h>
+#include <WebCore/ImageDocument.h>
+#include <WebCore/RenderView.h>
+
+#if PLATFORM(IOS)
+#include "SmartMagnificationControllerMessages.h"
+#endif
+
+#if PLATFORM(MAC)
+#include "ViewGestureControllerMessages.h"
+#endif
+
+using namespace WebCore;
+
+namespace WebKit {
+
+ViewGestureGeometryCollector::ViewGestureGeometryCollector(WebPage& webPage)
+    : m_webPage(webPage)
+#if PLATFORM(MAC)
+    , m_renderTreeSizeNotificationThreshold(0)
+#endif
+{
+    WebProcess::singleton().addMessageReceiver(Messages::ViewGestureGeometryCollector::messageReceiverName(), m_webPage.pageID(), *this);
+}
+
+ViewGestureGeometryCollector::~ViewGestureGeometryCollector()
+{
+    WebProcess::singleton().removeMessageReceiver(Messages::ViewGestureGeometryCollector::messageReceiverName(), m_webPage.pageID());
+}
+
+void ViewGestureGeometryCollector::dispatchDidCollectGeometryForSmartMagnificationGesture(FloatPoint origin, FloatRect targetRect, FloatRect visibleContentRect, bool isReplacedElement, double viewportMinimumScale, double viewportMaximumScale)
+{
+#if PLATFORM(MAC)
+    m_webPage.send(Messages::ViewGestureController::DidCollectGeometryForSmartMagnificationGesture(origin, targetRect, visibleContentRect, isReplacedElement, viewportMinimumScale, viewportMaximumScale));
+#endif
+#if PLATFORM(IOS)
+    m_webPage.send(Messages::SmartMagnificationController::DidCollectGeometryForSmartMagnificationGesture(origin, targetRect, visibleContentRect, isReplacedElement, viewportMinimumScale, viewportMaximumScale));
+#endif
+}
+
+void ViewGestureGeometryCollector::collectGeometryForSmartMagnificationGesture(FloatPoint origin)
+{
+    FloatRect visibleContentRect = m_webPage.mainFrameView()->unobscuredContentRectIncludingScrollbars();
+
+    if (m_webPage.mainWebFrame()->handlesPageScaleGesture())
+        return;
+
+    IntPoint originInContentsSpace = m_webPage.mainFrameView()->windowToContents(roundedIntPoint(origin));
+    HitTestResult hitTestResult = HitTestResult(originInContentsSpace);
+
+    m_webPage.mainFrameView()->renderView()->hitTest(HitTestRequest(), hitTestResult);
+    Node* node = hitTestResult.innerNode();
+    if (!node) {
+        dispatchDidCollectGeometryForSmartMagnificationGesture(FloatPoint(), FloatRect(), FloatRect(), false, 0, 0);
+        return;
+    }
+
+    bool isReplaced;
+    FloatRect renderRect;
+    double viewportMinimumScale;
+    double viewportMaximumScale;
+
+    computeZoomInformationForNode(*node, origin, renderRect, isReplaced, viewportMinimumScale, viewportMaximumScale);
+    dispatchDidCollectGeometryForSmartMagnificationGesture(origin, renderRect, visibleContentRect, isReplaced, viewportMinimumScale, viewportMaximumScale);
+}
+
+void ViewGestureGeometryCollector::computeZoomInformationForNode(Node& node, FloatPoint& origin, FloatRect& renderRect, bool& isReplaced, double& viewportMinimumScale, double& viewportMaximumScale)
+{
+    renderRect = node.renderRect(&isReplaced);
+    if (node.document().isImageDocument()) {
+        if (HTMLImageElement* imageElement = static_cast<ImageDocument&>(node.document()).imageElement()) {
+            if (&node != imageElement) {
+                renderRect = imageElement->renderRect(&isReplaced);
+                FloatPoint newOrigin = origin;
+                if (origin.x() < renderRect.x() || origin.x() > renderRect.maxX())
+                    newOrigin.setX(renderRect.x() + renderRect.width() / 2);
+                if (origin.y() < renderRect.y() || origin.y() > renderRect.maxY())
+                    newOrigin.setY(renderRect.y() + renderRect.height() / 2);
+                origin = newOrigin;
+            }
+            isReplaced = true;
+        }
+    }
+#if PLATFORM(MAC)
+    viewportMinimumScale = 0;
+    viewportMaximumScale = std::numeric_limits<double>::max();
+#else
+    viewportMinimumScale = m_webPage.minimumPageScaleFactor();
+    viewportMaximumScale = m_webPage.maximumPageScaleFactor();
+#endif
+}
+
+#if PLATFORM(MAC)
+void ViewGestureGeometryCollector::collectGeometryForMagnificationGesture()
+{
+    FloatRect visibleContentRect = m_webPage.mainFrameView()->unobscuredContentRectIncludingScrollbars();
+    bool frameHandlesMagnificationGesture = m_webPage.mainWebFrame()->handlesPageScaleGesture();
+    m_webPage.send(Messages::ViewGestureController::DidCollectGeometryForMagnificationGesture(visibleContentRect, frameHandlesMagnificationGesture));
+}
+
+void ViewGestureGeometryCollector::mainFrameDidLayout()
+{
+    if (m_renderTreeSizeNotificationThreshold && m_webPage.renderTreeSize() >= m_renderTreeSizeNotificationThreshold) {
+        m_webPage.send(Messages::ViewGestureController::DidHitRenderTreeSizeThreshold());
+        m_renderTreeSizeNotificationThreshold = 0;
+    }
+}
+#endif
+
+} // namespace WebKit
+