[LayoutNG] WIP on storing layout output in the legacy tree for multicol.

third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.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 NGBlockLayoutAlgorithm_h
 #define NGBlockLayoutAlgorithm_h
 
 #include "core/CoreExport.h"
 #include "core/layout/ng/geometry/ng_margin_strut.h"
 #include "core/layout/ng/ng_block_break_token.h"
@@ skipping 18 matching lines @@
   // @param space The constraint space which the algorithm should generate a
   //              fragment within.
   // @param break_token The break token from which the layout should start.
   NGBlockLayoutAlgorithm(NGBlockNode* node,
                          NGConstraintSpace* space,
                          NGBlockBreakToken* break_token = nullptr);
 
   Optional<MinMaxContentSize> ComputeMinMaxContentSize() const override;
   virtual RefPtr<NGLayoutResult> Layout() override;
 
+ protected:
+  NGFragmentBuilder builder_;
+  NGConstraintSpaceBuilder space_builder_;
+
+  NGBoxStrut border_and_padding_;
+  LayoutUnit content_size_;
+  LayoutUnit max_inline_size_;
+
  private:
   NGBoxStrut CalculateMargins(NGLayoutInputNode* child,
                               const NGConstraintSpace& space);
 
   // Creates a new constraint space for the current child.
   RefPtr<NGConstraintSpace> CreateConstraintSpaceForChild(NGLayoutInputNode*);
   void PrepareChildLayout(NGLayoutInputNode*);
   void FinishChildLayout(NGLayoutInputNode*,
                          NGConstraintSpace*,
                          RefPtr<NGLayoutResult>);
 
   // Final adjustments before fragment creation. We need to prevent the
   // fragment from crossing fragmentainer boundaries, and rather create a break
   // token if we're out of space.
   void FinalizeForFragmentation();
 
   // Calculates logical offset for the current fragment using either
   // {@code content_size_} when the fragment doesn't know it's offset
   // or {@code known_fragment_offset} if the fragment knows it's offset
   // @return Fragment's offset relative to the fragment's parent.
   NGLogicalOffset CalculateLogicalOffset(
       const WTF::Optional<NGLogicalOffset>& known_fragment_offset);
 
   // Updates the fragment's BFC offset if it's not already set.
   void UpdateFragmentBfcOffset(const NGLogicalOffset& offset);
 
-  NGFragmentBuilder builder_;
-  NGConstraintSpaceBuilder space_builder_;
-
-  NGBoxStrut border_and_padding_;
-  LayoutUnit content_size_;
-  LayoutUnit max_inline_size_;
   // MarginStrut for the previous child.
   NGMarginStrut curr_margin_strut_;
   NGLogicalOffset curr_bfc_offset_;
   NGBoxStrut curr_child_margins_;
 };
 
 }  // namespace blink
 
 #endif  // NGBlockLayoutAlgorithm_h