Move rendering/RenderObject to layout/LayoutObject.

Source/core/editing/CompositeEditCommand.cpp

 /*
  * Copyright (C) 2005, 2006, 2007, 2008 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 853 matching lines @@
     return placeholder.release();
 }
 
 PassRefPtrWillBeRawPtr<HTMLBRElement> CompositeEditCommand::addBlockPlaceholderIfNeeded(Element* container)
 {
     if (!container)
         return nullptr;
 
     document().updateLayoutIgnorePendingStylesheets();
 
-    RenderObject* renderer = container->renderer();
+    LayoutObject* renderer = container->renderer();
     if (!renderer || !renderer->isRenderBlockFlow())
         return nullptr;
 
     // append the placeholder to make sure it follows
     // any unrendered blocks
     RenderBlockFlow* block = toRenderBlockFlow(renderer);
     if (block->size().height() == 0 || (block->isListItem() && toRenderListItem(block)->isEmpty()))
         return appendBlockPlaceholder(container);
 
     return nullptr;
@@ skipping 613 matching lines @@
 }
 
 void CompositeEditCommand::trace(Visitor* visitor)
 {
     visitor->trace(m_commands);
     visitor->trace(m_composition);
     EditCommand::trace(visitor);
 }
 
 } // namespace blink