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

Source/core/rendering/RenderReplaced.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011-2012. 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 529 matching lines @@
 
 LayoutRect RenderReplaced::selectionRectForRepaint(const RenderLayerModelObject* repaintContainer, bool clipToVisibleContent)
 {
     ASSERT(!needsLayout());
 
     if (!isSelected())
         return LayoutRect();
 
     LayoutRect rect = localSelectionRect();
     if (clipToVisibleContent)
-        computeRectForRepaint(repaintContainer, rect);
+        adjustRectToRepaintBackingCoords(repaintContainer, rect);
     else
         rect = localToContainerQuad(FloatRect(rect), repaintContainer).enclosingBoundingBox();
 
     return rect;
 }
 
 LayoutRect RenderReplaced::localSelectionRect(bool checkWhetherSelected) const
 {
     if (checkWhetherSelected && !isSelected())
         return LayoutRect();
@@ skipping 57 matching lines @@
     // for repainting to avoid selection painting glitches.
     LayoutRect r = isSelected() ? localSelectionRect() : visualOverflowRect();
 
     RenderView* v = view();
     if (!RuntimeEnabledFeatures::repaintAfterLayoutEnabled() && v) {
         // FIXME: layoutDelta needs to be applied in parts before/after transforms and
         // repaint containers. https://bugs.webkit.org/show_bug.cgi?id=23308
         r.move(v->layoutDelta());
     }
 
-    computeRectForRepaint(repaintContainer, r);
+    adjustRectToRepaintBackingCoords(repaintContainer, r);
     return r;
 }
 
 }