Move rendering/RenderObject to layout/LayoutObject.

Source/core/layout/LayerStackingNode.cpp

Index: Source/core/layout/LayerStackingNode.cpp
diff --git a/Source/core/layout/LayerStackingNode.cpp b/Source/core/layout/LayerStackingNode.cpp
index 67e5eca5c8487866a421bdfa41b155e3312335cd..3e5216afceaca965140458e54dfe128337d7f1bd 100644
--- a/Source/core/layout/LayerStackingNode.cpp
+++ b/Source/core/layout/LayerStackingNode.cpp
@@ -156,7 +156,7 @@ void LayerStackingNode::rebuildZOrderLists()
     // The renderers of top layer elements are children of the view, sorted in top layer stacking order.
     if (layer()->isRootLayer()) {
         RenderView* view = renderer()->view();
-        for (RenderObject* child = view->firstChild(); child; child = child->nextSibling()) {
+        for (LayoutObject* child = view->firstChild(); child; child = child->nextSibling()) {
             Element* childElement = (child->node() && child->node()->isElementNode()) ? toElement(child->node()) : 0;
             if (childElement && childElement->isInTopLayer()) {
                 Layer* layer = toLayoutLayerModelObject(child)->layer();