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

Source/core/rendering/RenderBox.h

Index: Source/core/rendering/RenderBox.h
diff --git a/Source/core/rendering/RenderBox.h b/Source/core/rendering/RenderBox.h
index 8dd3ebfe602a2094c9b300190f8f9e9ba03f3865..78c418079e72b4327278825c5b4d602f350027c0 100644
--- a/Source/core/rendering/RenderBox.h
+++ b/Source/core/rendering/RenderBox.h
@@ -108,6 +108,12 @@ public:
     int pixelSnappedLogicalHeight() const { return style()->isHorizontalWritingMode() ? pixelSnappedHeight() : pixelSnappedWidth(); }
     int pixelSnappedLogicalWidth() const { return style()->isHorizontalWritingMode() ? pixelSnappedWidth() : pixelSnappedHeight(); }
 
+    LayoutUnit minimumLogicalHeightForEmptyLine() const
+    {
+        return borderAndPaddingLogicalHeight() + scrollbarLogicalHeight()
+            + lineHeight(true, isHorizontalWritingMode() ? HorizontalLine : VerticalLine, PositionOfInteriorLineBoxes);
+    }

[rune, 2015/02/26 10:38:50]

You should now use this method in RenderFlexibleBox::layoutFlexItems as well.

[changseok, 2015/02/26 11:28:54]

O.K

+
     void setLogicalLeft(LayoutUnit left)
     {
         if (style()->isHorizontalWritingMode())