[LayoutNG] Add box fragments to line boxes when needed

third_party/WebKit/Source/core/layout/ng/ng_fragment.h

Index: third_party/WebKit/Source/core/layout/ng/ng_fragment.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_fragment.h b/third_party/WebKit/Source/core/layout/ng/ng_fragment.h
index 87d0ed3e20c490b4364b6790f060716e1147dffa..4c43104f3236eaa1a6b5cd134ef02329b5c03967 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_fragment.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_fragment.h
@@ -6,6 +6,7 @@
 #define NGFragment_h
 
 #include "core/CoreExport.h"
+#include "core/layout/ng/geometry/ng_logical_offset.h"
 #include "core/layout/ng/ng_physical_fragment.h"
 #include "core/layout/ng/ng_writing_mode.h"
 #include "platform/LayoutUnit.h"
@@ -31,6 +32,7 @@ class CORE_EXPORT NGFragment {
   // Returns the offset relative to the parent fragment's content-box.
   LayoutUnit InlineOffset() const;
   LayoutUnit BlockOffset() const;
+  NGLogicalOffset Offset() const;
 
   NGPhysicalFragment::NGFragmentType Type() const;