[LayoutNG] Add NGLayoutInputNode::ShowNodeTree

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

Index: third_party/WebKit/Source/core/layout/ng/inline/ng_inline_item.h
diff --git a/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_item.h b/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_item.h
index 3d0365e81af55b3227472f7c4bb4e27ac5a1864f..850fb691f21f463087c6d9e5ac2efabaa3f9842f 100644
--- a/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_item.h
+++ b/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_item.h
@@ -64,6 +64,7 @@ class NGInlineItem {
   }
 
   NGInlineItemType Type() const { return static_cast<NGInlineItemType>(type_); }
+  const char* NGInlineItemTypeToString(int val) const;
 
   NGLayoutInlineShapeOptions ShapeOptions() const {
     return static_cast<NGLayoutInlineShapeOptions>(shape_options_);
@@ -99,6 +100,8 @@ class NGInlineItem {
   void AssertOffset(unsigned offset) const;
   void AssertEndOffset(unsigned offset) const;
 
+  String ToString() const;
+
  private:
   unsigned start_offset_;
   unsigned end_offset_;