[LayoutNG] PODify NGLayoutInputNode and sub-classes.

third_party/WebKit/Source/core/layout/ng/inline/ng_inline_node_data.h

Index: third_party/WebKit/Source/core/layout/ng/inline/ng_inline_node_data.h
diff --git a/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_node_data.h b/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_node_data.h
index c4ad32ebfc38126bc205b3f35454629cb69509d9..1989c8ac7ef134c7fb659b7246be5f47dcaef5d9 100644
--- a/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_node_data.h
+++ b/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_node_data.h
@@ -11,6 +11,8 @@
 
 namespace blink {
 
+class LayoutBox;
+
 // Data which is required for inline nodes.
 struct CORE_EXPORT NGInlineNodeData {
  private:
@@ -22,6 +24,13 @@ struct CORE_EXPORT NGInlineNodeData {
   String text_content_;
   Vector<NGInlineItem> items_;
 
+  // next_sibling_ is only valid after NGInlineNode::PrepareLayout is called.
+  // Calling NGInlineNode::NextSibling will trigger this.
+  LayoutBox* next_sibling_;
+
+  // start_inline_ must always be reset within the constructor of NGInlineNode.
+  LayoutObject* start_inline_;
+
   // TODO(kojii): This should move to somewhere else when we move PrepareLayout
   // to the correct place.
   bool is_bidi_enabled_ = false;