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

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

Index: third_party/WebKit/Source/core/layout/ng/geometry/ng_physical_offset.h
diff --git a/third_party/WebKit/Source/core/layout/ng/geometry/ng_physical_offset.h b/third_party/WebKit/Source/core/layout/ng/geometry/ng_physical_offset.h
index 5c4818cc3e4c24b98127f669c1e26d079ad4f732..d81cb81e5479972ee5fee1a9df4d68fd7ea3eb1f 100644
--- a/third_party/WebKit/Source/core/layout/ng/geometry/ng_physical_offset.h
+++ b/third_party/WebKit/Source/core/layout/ng/geometry/ng_physical_offset.h
@@ -7,10 +7,13 @@
 
 #include "core/CoreExport.h"
 
+#include "core/layout/ng/ng_writing_mode.h"
 #include "platform/LayoutUnit.h"
 
 namespace blink {
 
+struct NGLogicalOffset;
+
 // NGPhysicalOffset is the position of a rect (typically a fragment) relative to
 // its parent rect in the physical coordinate system.
 struct CORE_EXPORT NGPhysicalOffset {
@@ -20,6 +23,8 @@ struct CORE_EXPORT NGPhysicalOffset {
   LayoutUnit left;
   LayoutUnit top;
 
+  NGLogicalOffset ConvertToLogical(NGWritingMode mode) const;
+
   NGPhysicalOffset operator+(const NGPhysicalOffset& other) const;
   NGPhysicalOffset& operator+=(const NGPhysicalOffset& other);