[LayoutNG] Use NGLogical[Offset|Size] for NGFragment

third_party/WebKit/Source/core/layout/ng/geometry/ng_logical_size.h

Index: third_party/WebKit/Source/core/layout/ng/geometry/ng_logical_size.h
diff --git a/third_party/WebKit/Source/core/layout/ng/geometry/ng_logical_size.h b/third_party/WebKit/Source/core/layout/ng/geometry/ng_logical_size.h
index 448cd9d0bd9c0eef3ef6b236fcd4f549882fd807..9757dbc288ab4b9299d48d3c884b101d2d15560a 100644
--- a/third_party/WebKit/Source/core/layout/ng/geometry/ng_logical_size.h
+++ b/third_party/WebKit/Source/core/layout/ng/geometry/ng_logical_size.h
@@ -6,6 +6,7 @@
 #define NGLogicalSize_h
 
 #include "core/CoreExport.h"
+#include "core/layout/ng/geometry/ng_box_strut.h"
 #include "core/layout/ng/ng_writing_mode.h"
 #include "platform/LayoutUnit.h"
 
@@ -25,13 +26,19 @@ struct CORE_EXPORT NGLogicalSize {
   LayoutUnit block_size;
 
   NGPhysicalSize ConvertToPhysical(NGWritingMode mode) const;
-  bool operator==(const NGLogicalSize& other) const;
 
   bool IsEmpty() const {
     return inline_size == LayoutUnit() || block_size == LayoutUnit();
   }
+
+  bool operator==(const NGLogicalSize& other) const;
 };
 
+inline NGLogicalSize operator+(const NGLogicalSize& a, const NGBoxStrut& b) {
+  return NGLogicalSize(a.inline_size + b.InlineSum(),
+                       a.block_size + b.BlockSum());
+}
+
 CORE_EXPORT std::ostream& operator<<(std::ostream&, const NGLogicalSize&);
 
 }  // namespace blink