Move rendering/RenderBox to layout/LayoutBox.

Source/core/layout/LayoutObjectChildList.h

Index: Source/core/layout/LayoutObjectChildList.h
diff --git a/Source/core/layout/LayoutObjectChildList.h b/Source/core/layout/LayoutObjectChildList.h
index cbc640bab7b8d5cb58ad551470c88da84bbb9cda..7bb23a787d2f58cbb720ac6c8a34555997a366a7 100644
--- a/Source/core/layout/LayoutObjectChildList.h
+++ b/Source/core/layout/LayoutObjectChildList.h
@@ -45,7 +45,7 @@ public:
     LayoutObject* firstChild() const { return m_firstChild; }
     LayoutObject* lastChild() const { return m_lastChild; }
 
-    // FIXME: Temporary while RenderBox still exists. Eventually this will just happen during insert/append/remove methods on the child list, and nobody
+    // FIXME: Temporary while LayoutBox still exists. Eventually this will just happen during insert/append/remove methods on the child list, and nobody
     // will need to manipulate firstChild or lastChild directly.
     void setFirstChild(LayoutObject* child) { m_firstChild = child; }
     void setLastChild(LayoutObject* child) { m_lastChild = child; }