Move rendering/RenderBox to layout/LayoutBox.

Source/core/editing/iterators/TextIterator.cpp

Index: Source/core/editing/iterators/TextIterator.cpp
diff --git a/Source/core/editing/iterators/TextIterator.cpp b/Source/core/editing/iterators/TextIterator.cpp
index f8fb80a915829c08276c8a260af99bc0cbbb14c1..cab99b0f4f67cf14a54dfdbc46f00d196aeee96e 100644
--- a/Source/core/editing/iterators/TextIterator.cpp
+++ b/Source/core/editing/iterators/TextIterator.cpp
@@ -836,7 +836,7 @@ static bool shouldEmitExtraNewlineForNode(Node* node)
         || node->hasTagName(pTag)) {
         LayoutStyle* style = r->style();
         if (style) {
-            int bottomMargin = toRenderBox(r)->collapsedMarginAfter();
+            int bottomMargin = toLayoutBox(r)->collapsedMarginAfter();
             int fontSize = style->fontDescription().computedPixelSize();
             if (bottomMargin * 2 >= fontSize)
                 return true;