[CSS Grid Layout] Vertical rectangles not recognized as valid grid areas

Source/core/css/parser/CSSPropertyParser.cpp

Index: Source/core/css/parser/CSSPropertyParser.cpp
diff --git a/Source/core/css/parser/CSSPropertyParser.cpp b/Source/core/css/parser/CSSPropertyParser.cpp
index 89f31400a1c047514cc60219657d6f2a1bcab1c2..b3494c25b59f4320b1da53e23d960d0d3795d1bf 100644
--- a/Source/core/css/parser/CSSPropertyParser.cpp
+++ b/Source/core/css/parser/CSSPropertyParser.cpp
@@ -3708,7 +3708,7 @@ PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseGridTemplateAreas()
 
                 // The following checks test that the grid area is a single filled-in rectangle.
                 // 1. The new row is adjacent to the previously parsed row.
-                if (rowCount != gridCoordinate.rows.initialPositionIndex + 1)
+                if (rowCount != gridCoordinate.rows.finalPositionIndex + 1)
                     return nullptr;
 
                 // 2. The new area starts at the same position as the previously parsed area.