Merge back LayoutLayerModelObject into RenderBoxModelObject

Source/core/paint/BoxPainter.cpp

Index: Source/core/paint/BoxPainter.cpp
diff --git a/Source/core/paint/BoxPainter.cpp b/Source/core/paint/BoxPainter.cpp
index a87ed3e52c1c107ae8de9700a882f534265d4f8a..15bb8273e3ef1318c8718d1bec9d8cfef88d34d7 100644
--- a/Source/core/paint/BoxPainter.cpp
+++ b/Source/core/paint/BoxPainter.cpp
@@ -622,7 +622,7 @@ static inline int getSpaceBetweenImageTiles(int areaSize, int tileSize)
     return space;
 }
 
-void BoxPainter::calculateBackgroundImageGeometry(RenderBoxModelObject& obj, const LayoutLayerModelObject* paintContainer, const FillLayer& fillLayer, const LayoutRect& paintRect,
+void BoxPainter::calculateBackgroundImageGeometry(RenderBoxModelObject& obj, const RenderBoxModelObject* paintContainer, const FillLayer& fillLayer, const LayoutRect& paintRect,
     BackgroundImageGeometry& geometry, LayoutObject* backgroundObject)
 {
     LayoutUnit left = 0;