Introduce NGFloatingObject

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/ng/ng_layout_input_node.h"
 #include "core/layout/ng/ng_physical_box_fragment.h"
@@ skipping 69 matching lines @@
 
   void UpdateLayoutBox(NGPhysicalBoxFragment* fragment,
                        const NGConstraintSpace* constraint_space);
 
  private:
   // This is necessary for interop between old and new trees -- after our parent
   // positions us, it calls this function so we can store the position on the
   // underlying LayoutBox.
   void PositionUpdated();
 
+  void FloatPositionUpdated(LayoutObject* parent);

[ikilpatrick, 2017/01/20 00:03:17]

maybe additional comment here or within the function.

[Gleb Lanbin, 2017/01/20 00:45:27]

Done.

+
   bool CanUseNewLayout();
   bool HasInlineChildren();
 
   // After we run the layout algorithm, this function copies back the geometry
   // data to the layout box.
   void CopyFragmentDataToLayoutBox(const NGConstraintSpace&);
 
   // We can either wrap a layout_box_ or a style_/next_sibling_/first_child_
   // combination.
   LayoutBox* layout_box_;
   RefPtr<ComputedStyle> style_;
   Member<NGBlockNode> next_sibling_;
   Member<NGLayoutInputNode> first_child_;
   Member<NGLayoutCoordinator> layout_coordinator_;
   // TODO(mstensho): An input node may produce multiple fragments, so this
   // should probably be renamed to last_fragment_ or something like that, since
   // the last fragment is all we care about when resuming layout.
   Member<NGPhysicalBoxFragment> fragment_;
 };
 
 DEFINE_TYPE_CASTS(NGBlockNode,
                   NGLayoutInputNode,
                   node,
                   node->Type() == NGLayoutInputNode::kLegacyBlock,
                   node.Type() == NGLayoutInputNode::kLegacyBlock);
 
 }  // namespace blink
 
 #endif  // NGBlockNode