Implement a Hit Test Cache.

Source/core/layout/svg/LayoutSVGImage.cpp

 /*
  * Copyright (C) 2006 Alexander Kellett <lypanov@kde.org>
  * Copyright (C) 2006 Apple Computer, Inc.
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2007, 2008, 2009 Rob Buis <buis@kde.org>
  * Copyright (C) 2009 Google, Inc.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 151 matching lines @@
 
     PointerEventsHitRules hitRules(PointerEventsHitRules::SVG_IMAGE_HITTESTING, result.hitTestRequest(), style()->pointerEvents());
     bool isVisible = (style()->visibility() == VISIBLE);
     if (isVisible || !hitRules.requireVisible) {
         FloatPoint localPoint;
         if (!SVGLayoutSupport::transformToUserSpaceAndCheckClipping(this, localToParentTransform(), pointInParent, localPoint))
             return false;
 
         if (hitRules.canHitFill || hitRules.canHitBoundingBox) {
             if (m_objectBoundingBox.contains(localPoint)) {
-                updateHitTestResult(result, roundedLayoutPoint(localPoint));
+                updateHitTestResult(result, roundedLayoutPoint(localPoint), boundingRect(result.hitTestLocation().point()));
                 return true;
             }
         }
     }
 
     return false;
 }
 
 void LayoutSVGImage::imageChanged(WrappedImagePtr, const IntRect*)
 {
@@ skipping 17 matching lines @@
 
 void LayoutSVGImage::addFocusRingRects(Vector<LayoutRect>& rects, const LayoutPoint&) const
 {
     // this is called from paint() after the localTransform has already been applied
     LayoutRect contentRect = LayoutRect(paintInvalidationRectInLocalCoordinates());
     if (!contentRect.isEmpty())
         rects.append(contentRect);
 }
 
 } // namespace blink