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

Source/core/rendering/RenderBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. 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
@@ skipping 1564 matching lines @@
     if (!shouldCheckForInvalidationAfterLayout())
         return;
 
     bool establishesNewRepaintContainer = isRepaintContainer();
     const RenderLayerModelObject& newRepaintContainer = *adjustCompositedContainerForSpecialAncestors(establishesNewRepaintContainer ? this : &repaintContainer);
     // FIXME: This assert should be re-enabled when we move repaint to after compositing update. crbug.com/360286
     // ASSERT(&newRepaintContainer == containerForRepaint());
 
     const LayoutRect oldRepaintRect = previousRepaintRect();
     const LayoutPoint oldPositionFromRepaintContainer = previousPositionFromRepaintContainer();
-    setPreviousRepaintRect(clippedOverflowRectForRepaint(&newRepaintContainer));
+    setPreviousRepaintRect(boundsRectForRepaint(&newRepaintContainer));
     setPreviousPositionFromRepaintContainer(positionFromRepaintContainer(&newRepaintContainer));
 
     // If we are set to do a full repaint that means the RenderView will be
     // invalidated. We can then skip issuing of invalidations for the child
     // renderers as they'll be covered by the RenderView.
     if (view()->doingFullRepaint() && this != view()) {
         LayoutStateMaintainer statePusher(*this, isTableRow() ? LayoutSize() : locationOffset());
         RenderObject::repaintTreeAfterLayout(newRepaintContainer);
         return;
     }
@@ skipping 3092 matching lines @@
         return 0;
 
     if (!layoutState && !flowThreadContainingBlock())
         return 0;
 
     RenderBlock* containerBlock = containingBlock();
     return containerBlock->offsetFromLogicalTopOfFirstPage() + logicalTop();
 }
 
 } // namespace WebCore