Add NGLogicalOrigin and NGLogicalLeader parameters to NGLayoutOpportunityIterator.

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

Index: third_party/WebKit/Source/core/layout/ng/ng_units.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_units.h b/third_party/WebKit/Source/core/layout/ng/ng_units.h
index 1f4b0f619675f42d576168e947bc35bb16df4211..3f1b9b44a618cfd19719288c37b192bdf0269f5c 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_units.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_units.h
@@ -51,6 +51,18 @@ struct NGLogicalOffset {
   bool operator==(const NGLogicalOffset& other) const;
 };
 
+// Origin (in logical coordinates) for a fragment or inline content.
+struct NGLogicalOrigin {
+  LayoutUnit inline_offset;
+  LayoutUnit block_offset;
+};
+
+// Leader point (in logical coordinates) for a text fragment.
+struct NGLogicalLeader {
+  LayoutUnit inline_offset;
+  LayoutUnit block_offset;
+};
+
 // NGPhysicalOffset is the position of a rect (typically a fragment) relative to
 // its parent rect in the physical coordinate system.
 struct NGPhysicalOffset {