Implement mapAncestorToLocal for LayoutSVG{ModelObject,Block}

third_party/WebKit/Source/core/layout/svg/LayoutSVGBlock.cpp

 /*
  * Copyright (C) 2006 Apple Computer, Inc.
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 71 matching lines @@
 
     LayoutBlock::styleDidChange(diff, oldStyle);
     SVGResourcesCache::clientStyleChanged(this, diff, styleRef());
 }
 
 void LayoutSVGBlock::mapLocalToAncestor(const LayoutBoxModelObject* ancestor, TransformState& transformState, MapCoordinatesFlags, bool* wasFixed, const PaintInvalidationState* paintInvalidationState) const
 {
     SVGLayoutSupport::mapLocalToAncestor(this, ancestor, transformState, wasFixed, paintInvalidationState);
 }
 
+void LayoutSVGBlock::mapAncestorToLocal(const LayoutBoxModelObject* ancestor, TransformState& transformState, MapCoordinatesFlags) const
+{
+    if (this == ancestor)
+        return;
+    SVGLayoutSupport::mapAncestorToLocal(*this, ancestor, transformState);
+}
+
 const LayoutObject* LayoutSVGBlock::pushMappingToContainer(const LayoutBoxModelObject* ancestorToStopAt, LayoutGeometryMap& geometryMap) const
 {
     return SVGLayoutSupport::pushMappingToContainer(this, ancestorToStopAt, geometryMap);
 }
 
 LayoutRect LayoutSVGBlock::clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* paintInvalidationState) const
 {
     return SVGLayoutSupport::clippedOverflowRectForPaintInvalidation(*this, paintInvalidationContainer, paintInvalidationState);
 }
 
@@ skipping 13 matching lines @@
 void LayoutSVGBlock::invalidateTreeIfNeeded(PaintInvalidationState& paintInvalidationState)
 {
     if (!shouldCheckForPaintInvalidation(paintInvalidationState))
         return;
 
     ForceHorriblySlowRectMapping slowRectMapping(&paintInvalidationState);
     LayoutBlockFlow::invalidateTreeIfNeeded(paintInvalidationState);
 }
 
 } // namespace blink