Move rendering/RenderObject to layout/LayoutObject.

Source/core/rendering/RenderGrid.cpp

Index: Source/core/rendering/RenderGrid.cpp
diff --git a/Source/core/rendering/RenderGrid.cpp b/Source/core/rendering/RenderGrid.cpp
index b7b8ee3c6901d1716ad7373d6fe73a8d09843a39..ce061956a7d7d90d7c92762d3043be32300fda36 100644
--- a/Source/core/rendering/RenderGrid.cpp
+++ b/Source/core/rendering/RenderGrid.cpp
@@ -264,7 +264,7 @@ RenderGrid::~RenderGrid()
 {
 }
 
-void RenderGrid::addChild(RenderObject* newChild, RenderObject* beforeChild)
+void RenderGrid::addChild(LayoutObject* newChild, LayoutObject* beforeChild)
 {
     RenderBlock::addChild(newChild, beforeChild);
 
@@ -276,7 +276,7 @@ void RenderGrid::addChild(RenderObject* newChild, RenderObject* beforeChild)
     return;
 }
 
-void RenderGrid::removeChild(RenderObject* child)
+void RenderGrid::removeChild(LayoutObject* child)
 {
     RenderBlock::removeChild(child);