Merge back LayoutLayerModelObject into RenderBoxModelObject

Source/core/layout/compositing/LayerCompositor.cpp

 /*
  * Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 428 matching lines @@
         }
         break;
     case RemoveOwnCompositedLayerMapping:
     // PutInSquashingLayer means you might have to remove the composited layer mapping first.
     case PutInSquashingLayer:
         if (layer->hasCompositedLayerMapping()) {
             // If we're removing the compositedLayerMapping from a reflection, clear the source GraphicsLayer's pointer to
             // its replica GraphicsLayer. In practice this should never happen because reflectee and reflection
             // are both either composited, or not composited.
             if (layer->isReflection()) {
-                Layer* sourceLayer = toLayoutLayerModelObject(layer->renderer()->parent())->layer();
+                Layer* sourceLayer = toLayoutBoxModelObject(layer->renderer()->parent())->layer();
                 if (sourceLayer->hasCompositedLayerMapping()) {
                     ASSERT(sourceLayer->compositedLayerMapping()->mainGraphicsLayer()->replicaLayer() == layer->compositedLayerMapping()->mainGraphicsLayer());
                     sourceLayer->compositedLayerMapping()->mainGraphicsLayer()->setReplicatedByLayer(0);
                 }
             }
 
             layer->clearCompositedLayerMapping();
             compositedLayerMappingChanged = true;
         }
 
@@ skipping 701 matching lines @@
     } else if (graphicsLayer == m_scrollLayer.get()) {
         name = "LocalFrame Scrolling Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace blink