Store repaint rects in the coordinate space of their backing GraphicsLayer.

Source/core/rendering/svg/RenderSVGText.h

 /*
  * Copyright (C) 2006 Apple Computer, Inc.
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) Research In Motion Limited 2010-2012. 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 50 matching lines @@
     virtual bool isSVGText() const OVERRIDE { return true; }
 
     virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE;
     virtual bool nodeAtFloatPoint(const HitTestRequest&, HitTestResult&, const FloatPoint& pointInParent, HitTestAction) OVERRIDE;
     virtual PositionWithAffinity positionForPoint(const LayoutPoint&) OVERRIDE;
 
     virtual void layout() OVERRIDE;
 
     virtual void absoluteQuads(Vector<FloatQuad>&, bool* wasFixed) const OVERRIDE;
 
-    virtual void computeRectForRepaint(const RenderLayerModelObject* repaintContainer, LayoutRect&, bool fixed = false) const OVERRIDE;
+    virtual void mapRectToRepaintBacking(const RenderLayerModelObject* repaintContainer, LayoutRect&, bool fixed = false) const OVERRIDE;
 
     virtual void addChild(RenderObject* child, RenderObject* beforeChild = 0) OVERRIDE;
     virtual void removeChild(RenderObject*) OVERRIDE;
     virtual void willBeDestroyed() OVERRIDE;
 
     virtual FloatRect objectBoundingBox() const OVERRIDE { return frameRect(); }
     virtual FloatRect strokeBoundingBox() const OVERRIDE;
 
     virtual const AffineTransform& localToParentTransform() const OVERRIDE { return m_localTransform; }
     virtual RootInlineBox* createRootInlineBox() OVERRIDE;
 
     virtual RenderBlock* firstLineBlock() const OVERRIDE;
     virtual void updateFirstLetter() OVERRIDE;
 
     bool shouldHandleSubtreeMutations() const;
 
     bool m_needsReordering : 1;
     bool m_needsPositioningValuesUpdate : 1;
     bool m_needsTransformUpdate : 1;
     bool m_needsTextMetricsUpdate : 1;
     SVGTextLayoutAttributesBuilder m_layoutAttributesBuilder;
     Vector<SVGTextLayoutAttributes*> m_layoutAttributes;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderSVGText, isSVGText());
 
 }
 
 #endif