Move rendering/RenderObject to layout/LayoutObject.

Source/core/rendering/RenderMultiColumnSet.cpp

 /*
  * Copyright (C) 2012 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 33 matching lines @@
 {
     Document& document = flowThread->document();
     RenderMultiColumnSet* renderer = new RenderMultiColumnSet(flowThread);
     renderer->setDocumentForAnonymous(&document);
     renderer->setStyle(RenderStyle::createAnonymousStyleWithDisplay(parentStyle, BLOCK));
     return renderer;
 }
 
 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);
     }
     return 0;
 }
 
 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);
     }
     return 0;
 }
 
 void RenderMultiColumnSet::setLogicalTopInFlowThread(LayoutUnit logicalTop)
 {
     LayoutRect rect = flowThreadPortionRect();
     if (isHorizontalWritingMode())
@@ skipping 550 matching lines @@
 
 void RenderMultiColumnSet::detachRegion()
 {
     if (m_flowThread) {
         m_flowThread->removeRegionFromThread(this);
         m_flowThread = 0;
     }
 }
 
 }