[LayoutNG] PODify NGLayoutInputNode and sub-classes.

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NGBlockNode_h
 #define NGBlockNode_h
 
 #include "core/CoreExport.h"
 #include "core/layout/LayoutBox.h"
 #include "core/layout/ng/ng_layout_input_node.h"
 #include "core/layout/ng/ng_physical_box_fragment.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
-class ComputedStyle;
 class LayoutObject;
 class NGBreakToken;
 class NGConstraintSpace;
 class NGLayoutResult;
 struct NGLogicalOffset;
 struct MinMaxContentSize;
 
 // Represents a node to be laid out.
 class CORE_EXPORT NGBlockNode final : public NGLayoutInputNode {
   friend NGLayoutInputNode;
-
  public:
-  explicit NGBlockNode(LayoutObject*);
-
-  ~NGBlockNode() override;
+  explicit NGBlockNode(LayoutBox*);
 
   RefPtr<NGLayoutResult> Layout(NGConstraintSpace* constraint_space,
-                                NGBreakToken* break_token = nullptr) override;
-  NGLayoutInputNode* NextSibling() override;
-  LayoutObject* GetLayoutObject() const override;
+                                NGBreakToken* break_token = nullptr);
+  NGLayoutInputNode NextSibling() const;
 
   // Computes the value of min-content and max-content for this box.
   // If the underlying layout algorithm's ComputeMinMaxContentSize returns
   // no value, this function will synthesize these sizes using Layout with
   // special constraint spaces -- infinite available size for max content, zero
   // available size for min content, and percentage resolution size zero for
   // both.
-  MinMaxContentSize ComputeMinMaxContentSize() override;
+  MinMaxContentSize ComputeMinMaxContentSize();
 
-  const ComputedStyle& Style() const override;
+  NGLayoutInputNode FirstChild();
 
-  NGLayoutInputNode* FirstChild();
-
-  DECLARE_VIRTUAL_TRACE();
-
-  // Runs layout on layout_box_ and creates a fragment for the resulting
-  // geometry.
+  // Runs layout on the underlying LayoutObject and creates a fragment for the
+  // resulting geometry.
   RefPtr<NGLayoutResult> RunOldLayout(const NGConstraintSpace&);
 
   // Called if this is an out-of-flow block which needs to be
   // positioned with legacy layout.
   void UseOldOutOfFlowPositioning();
 
   // Save static position for legacy AbsPos layout.
   void SaveStaticOffsetForLegacy(const NGLogicalOffset&);
 
   bool CanUseNewLayout() const;
 
-  String ToString() const override;
+  String ToString() const;
 
  private:
   // After we run the layout algorithm, this function copies back the geometry
   // data to the layout box.
   void CopyFragmentDataToLayoutBox(const NGConstraintSpace&, NGLayoutResult*);
-
-  // We can either wrap a layout_box_ or a next_sibling_/first_child_
-  // combination.
-  LayoutBox* layout_box_;
-  Member<NGLayoutInputNode> next_sibling_;
-  Member<NGLayoutInputNode> first_child_;
 };
 
 DEFINE_TYPE_CASTS(NGBlockNode,
                   NGLayoutInputNode,
                   node,
                   node->IsBlock(),
                   node.IsBlock());
 
 }  // namespace blink
 
 #endif  // NGBlockNode