[LayoutNG] Refactor main-loop of block layout algorithm.

third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.h

Index: third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.h b/third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.h
index 1ca009956329ba579eea408887ba52609da840a3..ae697ca92989c53d76e8391dbf45f9528762d669 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.h
@@ -31,6 +31,10 @@ class CORE_EXPORT NGLayoutInputNode
 
   bool IsFloating() const { return IsBlock() && Style().IsFloating(); }
 
+  bool IsOutOfFlowPositioned() const {
+    return IsBlock() && Style().HasOutOfFlowPosition();
+  }
+
   virtual ~NGLayoutInputNode(){};
 
   // Performs layout on this input node, will return the layout result.