Move rendering/RenderObject to layout/LayoutObject.

Source/core/rendering/RenderMultiColumnSet.cpp

Index: Source/core/rendering/RenderMultiColumnSet.cpp
diff --git a/Source/core/rendering/RenderMultiColumnSet.cpp b/Source/core/rendering/RenderMultiColumnSet.cpp
index 4cdd392c3c387bef9018f69955c415b2a7872a6b..653403ee5fe2a9094e87ab9954200c9cd92540bd 100644
--- a/Source/core/rendering/RenderMultiColumnSet.cpp
+++ b/Source/core/rendering/RenderMultiColumnSet.cpp
@@ -51,7 +51,7 @@ RenderMultiColumnSet* RenderMultiColumnSet::createAnonymous(RenderFlowThread* fl
 
 RenderMultiColumnSet* RenderMultiColumnSet::nextSiblingMultiColumnSet() const
 {
-    for (RenderObject* sibling = nextSibling(); sibling; sibling = sibling->nextSibling()) {
+    for (LayoutObject* sibling = nextSibling(); sibling; sibling = sibling->nextSibling()) {
         if (sibling->isRenderMultiColumnSet())
             return toRenderMultiColumnSet(sibling);
     }
@@ -60,7 +60,7 @@ RenderMultiColumnSet* RenderMultiColumnSet::nextSiblingMultiColumnSet() const
 
 RenderMultiColumnSet* RenderMultiColumnSet::previousSiblingMultiColumnSet() const
 {
-    for (RenderObject* sibling = previousSibling(); sibling; sibling = sibling->previousSibling()) {
+    for (LayoutObject* sibling = previousSibling(); sibling; sibling = sibling->previousSibling()) {
         if (sibling->isRenderMultiColumnSet())
             return toRenderMultiColumnSet(sibling);
     }