*** DO NOT LAND *** Attempt to understand Regions complexity

Source/core/rendering/RenderReplica.cpp

Index: Source/core/rendering/RenderReplica.cpp
diff --git a/Source/core/rendering/RenderReplica.cpp b/Source/core/rendering/RenderReplica.cpp
index d7885c279094e452cb80df9c7907d20909f9415a..5b2bb6141bbe08951c389aa01103f7a1316d7824 100644
--- a/Source/core/rendering/RenderReplica.cpp
+++ b/Source/core/rendering/RenderReplica.cpp
@@ -84,7 +84,7 @@ void RenderReplica::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
         // Turn around and paint the parent layer. Use temporary clipRects, so that the layer doesn't end up caching clip rects
         // computing using the wrong rootLayer
         RenderLayer* rootPaintingLayer = layer()->transform() ? layer()->parent() : layer()->enclosingTransformedAncestor();
-        LayerPaintingInfo paintingInfo(rootPaintingLayer, paintInfo.rect, PaintBehaviorNormal, LayoutSize(), 0, paintInfo.renderRegion);
+        LayerPaintingInfo paintingInfo(rootPaintingLayer, paintInfo.rect, PaintBehaviorNormal, LayoutSize(), 0);
         PaintLayerFlags flags = PaintLayerHaveTransparency | PaintLayerAppliedTransform | PaintLayerTemporaryClipRects | PaintLayerPaintingReflection;
         layer()->parent()->paintLayer(paintInfo.context, paintingInfo, flags);
     } else if (paintInfo.phase == PaintPhaseMask)