[LayoutNG] Move NGInlineNode data to NGInlineNodeData.

third_party/WebKit/Source/core/layout/ng/layout_ng_block_flow.cc

 // 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.
 
 #include "core/layout/ng/layout_ng_block_flow.h"
 
 #include "core/layout/LayoutAnalyzer.h"
 #include "core/layout/ng/ng_constraint_space.h"
 #include "core/layout/ng/ng_fragment.h"
 
@@ skipping 34 matching lines @@
     SetLogicalTop(computed_values.position_);
   }
 
   for (auto& descendant : result->OutOfFlowDescendants())
     descendant->UseOldOutOfFlowPositioning();
 
   UpdateAfterLayout();
   ClearNeedsLayout();
 }
 
+NGInlineNodeData& LayoutNGBlockFlow::GetNGInlineNodeData() const {
+  DCHECK(ng_inline_node_data_);
+  return *ng_inline_node_data_.get();
+}
+
+void LayoutNGBlockFlow::ResetNGInlineNodeData() {
+  ng_inline_node_data_ = WTF::MakeUnique<NGInlineNodeData>();
+}
+
 }  // namespace blink