Add scrollbar logical width while computing intrinsic logical width

Source/core/rendering/RenderGrid.cpp

Index: Source/core/rendering/RenderGrid.cpp
diff --git a/Source/core/rendering/RenderGrid.cpp b/Source/core/rendering/RenderGrid.cpp
index 0f5c1b684c9ff5ca5411928a447295ab000b7ff4..9b2fa9009d02e02da0050114200def5b1da764a3 100644
--- a/Source/core/rendering/RenderGrid.cpp
+++ b/Source/core/rendering/RenderGrid.cpp
@@ -388,7 +388,9 @@ void RenderGrid::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, Layo
         minLogicalWidth += minTrackBreadth;
         maxLogicalWidth += maxTrackBreadth;
 
-        // FIXME: This should add in the scrollbarWidth (e.g. see RenderFlexibleBox).
+        LayoutUnit scrollbarWidth = intrinsicScrollbarLogicalWidth();
+        maxLogicalWidth += scrollbarWidth;
+        minLogicalWidth += scrollbarWidth;
     }
 }