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

Source/core/dom/Position.cpp

Index: Source/core/dom/Position.cpp
diff --git a/Source/core/dom/Position.cpp b/Source/core/dom/Position.cpp
index c8394477a865f0e02c933b9951c704ddbe171fc9..2cd26a4e3b4c6dde8833ad678dcc9a810b2f3df7 100644
--- a/Source/core/dom/Position.cpp
+++ b/Source/core/dom/Position.cpp
@@ -855,7 +855,7 @@ bool Position::isCandidate() const
     if (isHTMLHtmlElement(*m_anchorNode))
         return false;
 
-    if (renderer->isLayoutBlockFlow() || renderer->isFlexibleBox()) {
+    if (renderer->isLayoutBlockFlow() || renderer->isFlexibleBox() || renderer->isLayoutGrid()) {
         if (toLayoutBlock(renderer)->logicalHeight() || isHTMLBodyElement(*m_anchorNode)) {
             if (!Position::hasRenderedNonAnonymousDescendantsWithHeight(renderer))
                 return atFirstEditingPositionForNode() && !Position::nodeIsUserSelectNone(deprecatedNode());