Div having contentEditable and display:grid cannot be edited if it is empty.

Source/core/rendering/RenderFlexibleBox.cpp

Index: Source/core/rendering/RenderFlexibleBox.cpp
diff --git a/Source/core/rendering/RenderFlexibleBox.cpp b/Source/core/rendering/RenderFlexibleBox.cpp
index 9eba7ef763a2200cda43c56f12184b06563e5cfb..4db50d14b5ed83e5d8b734871b1f2801ab310527 100644
--- a/Source/core/rendering/RenderFlexibleBox.cpp
+++ b/Source/core/rendering/RenderFlexibleBox.cpp
@@ -661,9 +661,7 @@ void RenderFlexibleBox::layoutFlexItems(bool relayoutChildren)
         // a line because all our children might be out of flow positioned.
         // Instead of just checking if we have a line, make sure the flexbox
         // has at least a line's worth of height to cover this case.
-        LayoutUnit minHeight = borderAndPaddingLogicalHeight()
-            + lineHeight(true, isHorizontalWritingMode() ? HorizontalLine : VerticalLine, PositionOfInteriorLineBoxes)
-            + scrollbarLogicalHeight();
+        LayoutUnit minHeight = minimumLogicalHeightForEmptyLine();
         if (size().height() < minHeight)
             setLogicalHeight(minHeight);
     }